Updated on 2024/05/15

写真a

 
FUJITA, Koji
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Climate Science Professor
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Professor

Degree 1

  1. Ph.D (Science) ( Nagoya University ) 

Research Interests 2

  1. glacier

  2. cryosphere

Research Areas 1

  1. Others / Others  / Environmental Dynamic Analysis

Current Research Project and SDGs 3

  1. 水安定同位体をもちいた南極における水循環

  2. Water in arid terrain research

  3. Glacier variations in the Asian Highland

Research History 6

  1. Disaster Prevention Research Institute, Kyoto University   Water Resources Distribution Assessment, Water Resources Research Center   Visiting Professor

    2020.4 - 2022.3

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    Country:Japan

  2. Nagoya University   Graduate School of Environmental Studies   Professor

    2018.4

  3. 44th Japanese Antarctica Research Expedition 44 Wintering at Dome Fuji Station

    2002.11 - 2004.3

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    Country:Japan

  4. Nagoya University   Graduate School of Environmental Studies   Associate Professor

    2001.4 - 2018.3

  5. Graduate School of Environmental Studies, Nagoya University

    2001.4

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    Country:Japan

  6. Insititute for Hydrospheric-Atmospheric Sciences, Nagoya University

    1998.2 - 2001.3

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    Country:Japan

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Education 2

  1. Nagoya University   Graduate School, Division of Natural Science

    - 1998

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    Country: Japan

  2. Kyoto University   Faculty of Science

    - 1992

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    Country: Japan

Professional Memberships 9

  1. Japanese Society of Snow and Ice

  2. International Glaciological Society

  3. American Geophysical Union

  4. Japan Geoscience Union

  5. International Glaciological Society

  6. European Geosciences Union

  7. American Geophysical Union

  8. 日本地球惑星科学連合

  9. 日本雪氷学会

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Committee Memberships 5

  1. 国立極地研究所   氷床コア研究委員会  

    2012.4   

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    Committee type:Academic society

  2. 海外学術調査総括班   海外調査専門委員会  

    2011.4   

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    Committee type:Academic society

  3. 国立極地研究所   南極観測気水圏専門部会  

    2009.4   

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    Committee type:Academic society

  4. 日本雪氷学会   電子情報委員会  

    2007.5 - 2017.5   

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    Committee type:Academic society

  5. 日本雪氷学会   雪氷編集委員会  

    2005.5 - 2017.5   

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    Committee type:Academic society

Awards 5

  1. 日本雪氷学会学術賞

    2014.9   日本雪氷学会  

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    Country:Japan

  2. 日本雪氷学会論文賞(共同)

    2007.9   日本雪氷学会  

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    Country:Japan

  3. 日本雪氷学会平田賞

    2002.9  

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    Country:Japan

  4. 中谷宇吉郎学術奨励賞

    1998.2  

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    Country:Japan

  5. 秩父宮記念学術賞(共同)

    1992  

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    Country:Japan

 

Papers 205

  1. Long-term relationships between summer clouds and aerosols over mid-high latitudes of the Northern Hemisphere Reviewed

    Akihisa Watari, Yoshinori Iizuka, Koji Fujita, Hirohiko Masunaga, Kazuaki Kawamoto

    Scientific Reports   Vol. 14 ( 1 ) page: 9059   2024.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    While the short-term relationship between clouds and aerosols is well known, no adequate data is available to verify the longer-term, annual to decadal, relationship. It is important to quantify the aerosol–cloud interaction (ACI) for mitigating uncertainty in climate prediction. Here the long-term ACI over the mid-to-high latitudes of the Northern Hemisphere was analyzed by using seasonally-resolved ion fluxes reconstructed from a southeastern Greenland ice core (SE-Dome ice core) as aerosol proxies, and satellite-based summer cloud amount between 1982 and 2014. As a result, SO<sub>4</sub><sup>2−</sup> flux in the ice core shows significant positive correlation with total cloud amounts ($${CC}_{T}$$) and cloud droplet concentration ($${N}_{d}$$) in the summer over the southeastern Greenland Sea, implying that the sulfate aerosols may contribute to the variability of $${CC}_{T}$$ via microphysical cloud processes. Significant positive correlations are persistent even under the constrained conditions when cloud formation factors such as relative humidity, air temperature at cloud height, and summer North Atlantic Oscillation are limited within ± 1σ variability. Hence sulfate aerosols should control the interannual variability of summer $${CC}_{T}$$ In terms of decadal changes, $${CC}_{T}$$ was approximately 3–5% higher in the 1960s–1970s than in the 1990s–2000s, which can be explained by changes in the, $${ { {\text{SO } } }_{4 } }^{2-}$$ flux preserved in the SE-Dome ice core.

    DOI: 10.1038/s41598-024-59817-7

    Other Link: https://www.nature.com/articles/s41598-024-59817-7

  2. Modelling runoff components and hydrological processes in glaciated catchments of the inner Tien-Shan, Kyrgyzstan Reviewed International coauthorship

    Sanjar Sadyrov, Kenji Tanaka, Rysbek Satylkanov, Temur Khujanazarov, Yoshiya Touge, Koji Fujita

    Frontiers in Earth Science   Vol. 11   page: 1306476   2024.4

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Frontiers Media SA  

    Accurately quantifying runoff sources and understanding hydrological processes in glaciated mountain basins is essential for effective water resource management in the face of climate change. This study aimed to determine the contributions from various runoff sources in glaciated basins within the inner Tien-Shan mountains of Kyrgyzstan by utilizing integrated land surface, glacier energy-mass balance, and river routing models. To account for local topographic influences on solar radiation and cloud transmissivity processes, gridded meteorological forcing data were downscaled. The integrated models were then evaluated against observed discharge, glacier mass balance, and snow water equivalent, with a focus on the Kara-Batkak glacier reference site. Shortwave radiation correction was particularly important for improving the accuracy of model simulations. The results indicate that the peak glacier melt contribution occurs in July and August, with some basins reaching up to 54%. On an annual basis, the average contribution from glaciers across the basins was found to be 19%, while the ratios of snowmelt and rainfall were 58% and 23%, respectively. This study highlights the utility of integrated modelling approaches in understanding and quantifying runoff components in data-scarce high mountain regions. The incorporation of observed glacier data proved to be crucial for accurately representing hydrological processes under current climatic conditions. These findings underscore the significance of considering glacier dynamics and their influence on water resources to inform effective water management strategies in glaciated mountain basins.

    DOI: 10.3389/feart.2023.1306476

    Web of Science

  3. Anthropogenic Influence on Tropospheric Reactive Bromine Since the Pre‐industrial: Implications for Arctic Ice‐Core Bromine Trends Reviewed International coauthorship

    Shuting Zhai, Joseph R. McConnell, Nathan Chellman, Michel Legrand, Thomas Opel, Hanno Meyer, Lyatt Jaeglé, Kaitlyn Confer, Koji Fujita, Xuan Wang, Becky Alexander

    Geophysical Research Letters   Vol. 51 ( 5 ) page: e2023GL107733   2024.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    Abstract

    Tropospheric reactive bromine (Br<sub>y</sub>) influences the oxidation capacity of the atmosphere by acting as a sink for ozone and nitrogen oxides. Aerosol acidity plays a crucial role in Br<sub>y</sub> abundances through acid‐catalyzed debromination from sea‐salt‐aerosol, the largest global source. Bromine concentrations in a Russian Arctic ice‐core, Akademii Nauk, show a 3.5‐fold increase from pre‐industrial (PI) to the 1970s (peak acidity, PA), and decreased by half to 1999 (present day, PD). Ice‐core acidity mirrors this trend, showing robust correlation with bromine, especially after 1940 (r = 0.9). Model simulations considering anthropogenic emission changes alone show that atmospheric acidity is the main driver of Br<sub>y</sub> changes, consistent with the observed relationship between acidity and bromine. The influence of atmospheric acidity on Br<sub>y</sub> should be considered in interpretation of ice‐core bromine trends.

    DOI: 10.1029/2023GL107733

    Web of Science

  4. Foehn winds influence surface ablation on Glaciar Perito Moreno, Southern Patagonian Icefield Reviewed International coauthorship

    Masahiro Minowa, Pedro Skvarca, Koji Fujita

    Journal of Glaciology     page: 1 - 33   2024.1

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    DOI: 10.1017/jog.2023.106

  5. Quality-controlled meteorological datasets from SIGMA automatic weather stations in northwest Greenland, 2012–2020 Reviewed International journal

    Motoshi Nishimura, Teruo Aoki, Masashi Niwano, Sumito Matoba, Tomonori Tanikawa, Tetsuhide Yamasaki, Satoru Yamaguchi, Koji Fujita

    Earth System Science Data   Vol. 15 ( 11 ) page: 5207 - 5226   2023.11

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus GmbH  

    Abstract. In situ meteorological data are essential to better understand ongoing environmental changes in the Arctic. Here, we present a dataset of quality-controlled meteorological observations from two automatic weather stations in northwest Greenland from July 2012 to the end of August 2020. The stations were installed in the accumulation area on the Greenland Ice Sheet (SIGMA-A site, 1490 m a.s.l.) and near the equilibrium line of the Qaanaaq Ice Cap (SIGMA-B site, 944 m a.s.l.). We describe the two-step sequence of quality-controlling procedures that we used to create increasingly reliable datasets by masking erroneous data records. Those datasets are archived in the Arctic Data archive System (ADS) (SIGMA-A – https://doi.org/10.17592/001.2022041303, Nishimura et al., 2023f; SIGMA-B – https://doi.org/10.17592/001.2022041306, Nishimura et al., 2023c). We analyzed the resulting 2012–2020 time series of air temperature, surface height, and surface albedo and histograms of longwave radiation (a proxy of cloudiness). We found that surface height increased, and no significant albedo decline in summer was observed at the SIGMA-A site. In contrast, high air temperatures and frequent clear-sky conditions in the summers of 2015, 2019, and 2020 at the SIGMA-B site caused significant albedo and surface lowering. Therefore, it appears that these weather condition differences led to the apparent surface height decrease at the SIGMA-B site but not at the SIGMA-A site. We anticipate that this quality-controlling method and these datasets will aid in climate studies of northwest Greenland and will contribute to the advancement of broader polar climate studies.

    DOI: 10.5194/essd-15-5207-2023

    Web of Science

  6. Implications of Snowpack Reactive Bromine Production for Arctic Ice Core Bromine Preservation Reviewed International coauthorship

    Shuting Zhai, William Swanson, Joseph R. McConnell, Nathan Chellman, Thomas Opel, Michael Sigl, Hanno Meyer, Xuan Wang, Lyatt Jaeglé, Jochen Stutz, Jack E. Dibb, Koji Fujita, Becky Alexander

    Journal of Geophysical Research: Atmospheres   Vol. 128 ( 20 ) page: e2023JD039257   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    Abstract

    Snowpack emissions are recognized as an important source of gas‐phase reactive bromine in the Arctic and are necessary to explain ozone depletion events in spring caused by the catalytic destruction of ozone by halogen radicals. Quantifying bromine emissions from snowpack is essential for interpretation of ice‐core bromine. We present ice‐core bromine records since the pre‐industrial (1750 CE) from six Arctic locations and examine potential post‐depositional loss of snowpack bromine using a global chemical transport model. Trend analysis of the ice‐core records shows that only the high‐latitude coastal Akademii Nauk (AN) ice core from the Russian Arctic preserves significant trends since pre‐industrial times that are consistent with trends in sea ice extent and anthropogenic emissions from source regions. Model simulations suggest that recycling of reactive bromine on the snow skin layer (top 1 mm) results in 9–17% loss of deposited bromine across all six ice‐core locations. Reactive bromine production from below the snow skin layer and within the snow photic zone is potentially more important, but the magnitude of this source is uncertain. Model simulations suggest that the AN core is most likely to preserve an atmospheric signal compared to five Greenland ice cores due to its high latitude location combined with a relatively high snow accumulation rate. Understanding the sources and amount of photochemically reactive snow bromide in the snow photic zone throughout the sunlit period in the high Arctic is essential for interpreting ice‐core bromine, and warrants further lab studies and field observations at inland locations.

    DOI: 10.1029/2023JD039257

    Web of Science

    Other Link: https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2023JD039257

  7. SE‐Dome II Ice Core Dating With Half‐Year Precision: Increasing Melting Events From 1799 to 2020 in Southeastern Greenland Reviewed

    Kaoru Kawakami, Yoshinori Iizuka, Mahiro Sasage, Mai Matsumoto, Takeshi Saito, Akira Hori, Sakiko Ishino, Shuji Fujita, Koji Fujita, Keita Takasugi, Takumi Hatakeyama, Saaya Hamamoto, Akihisa Watari, Nao Esashi, Miu Otsuka, Ryu Uemura, Kazuho Horiuchi, Masahiro Minowa, Shohei Hattori, Teruo Aoki, Motohiro Hirabayashi, Kenji Kawamura, Sumito Matoba

    Journal of Geophysical Research: Atmospheres   Vol. 128 ( 20 ) page: e2023JD038874   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    Abstract

    Arctic warming has accelerated surface melting even in the highland areas of the Greenland ice sheet (GrIS). Understanding the relationship between climate and surface melting is essential for improving the estimates of ice‐sheet mass loss due to warming. Here we analyze a 250 m‐long ice core from the southeastern dome of GrIS (SE‐Dome site; 67°19′17″ N, 36°47′03″ W, 3,161 m a.s.l.), where the annual mean temperature is −20.9°C and the accumulation rate is high and there is a large discrepancy among climate models regarding snow accumulation estimates. A time scale was established for 1799–2020 with a half‐year uncertainty using annual counting of H<sub>2</sub>O<sub>2</sub> concentration and five time horizons determined by electrical conductivity, melt events, and tritium concentration. The annual accumulation rate from the ice core shows no significant trend over 221 years and has an average of 1.04 ± 0.20 m w.e. year<sup>−1</sup>. In contrast, the frequency and thickness of refrozen melt layer (ML) have increased over 221 years, and are synchronized with temperature changes in the Arctic. The thickness of MLs correlates positively with the time‐integrated summer temperature anomaly using a reanalysis of air temperature. The in‐situ accumulation records in the southeastern GrIS provide an important basis for correcting reanalysis data such as ERA5, which in turn are valuable for improving regional climate models.

    DOI: 10.1029/2023JD038874

    Web of Science

  8. Land Surface Modeling in the Himalayas: On the Importance of Evaporative Fluxes for the Water Balance of a High‐Elevation Catchment Reviewed International coauthorship

    Pascal Buri, Simone Fatichi, Thomas E. Shaw, Evan S. Miles, Michael J. McCarthy, Catriona L. Fyffe, Stefan Fugger, Shaoting Ren, Marin Kneib, Achille Jouberton, Jakob Steiner, Koji Fujita, Francesca Pellicciotti

    Water Resources Research   Vol. 59 ( 10 ) page: e2022WR033841   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    Abstract

    High Mountain Asia (HMA) is among the most vulnerable water towers globally and yet future projections of water availability in and from its high‐mountain catchments remain uncertain, as their hydrologic response to ongoing environmental changes is complex. Mechanistic modeling approaches incorporating cryospheric, hydrological, and vegetation processes in high spatial, temporal, and physical detail have never been applied for high‐elevation catchments of HMA. We use a land surface model at high spatial and temporal resolution (100 m and hourly) to simulate the coupled dynamics of energy, water, and vegetation for the 350 km<sup>2</sup> Langtang catchment (Nepal). We compare our model outputs for one hydrological year against a large set of observations to gain insight into the partitioning of the water balance at the subseasonal scale and across elevation bands. During the simulated hydrological year, we find that evapotranspiration is a key component of the total water balance, as it causes about the equivalent of 20% of all the available precipitation or 154% of the water production from glacier melt in the basin to return directly to the atmosphere. The depletion of the cryospheric water budget is dominated by snow melt, but at high elevations is primarily dictated by snow and ice sublimation. Snow sublimation is the dominant vapor flux (49%) at the catchment scale, accounting for the equivalent of 11% of snowfall, 17% of snowmelt, and 75% of ice melt, respectively. We conclude that simulations should consider sublimation and other evaporative fluxes explicitly, as otherwise water balance estimates can be ill‐quantified.

    DOI: 10.1029/2022WR033841

    Web of Science

  9. Modelling the development and decay of cryoconite holes in northwestern Greenland Reviewed

    Yukihiko Onuma, Koji Fujita, Nozomu Takeuchi, Masashi Niwano, Teruo Aoki

    The Cryosphere   Vol. 17 ( 8 ) page: 3309 - 3328   2023.8

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus GmbH  

    Abstract. Cryoconite holes (CHs) are water-filled cylindrical holes with cryoconite (dark-coloured sediment) deposited at their bottoms, forming on ablatingice surfaces of glaciers and ice sheets worldwide. Because the collapse of CHs may disperse cryoconite on the ice surface, thereby decreasing theice surface albedo, accurate simulation of the temporal changes in CH depth is essential for understanding ice surface melt. We established a novelmodel that simulates the temporal changes in CH depth using heat budgets calculated independently at the ice surface and CH bottom based onhole-shaped geometry. We evaluated the model with in situ observations of the CH depths on the Qaanaaq ice cap in northwestern Greenland during the2012, 2014, and 2017 melt seasons. The model reproduced the observed depth changes and timing of CH collapse well. Although earlier models haveshown that CH depth tends to be deeper when downward shortwave radiation is intense, our sensitivity tests suggest that deeper CH tends to form whenthe diffuse component of downward shortwave radiation is dominant, whereas CHs tend to be shallower when the direct component is dominant. Inaddition, the total heat flux to the CH bottom is dominated by shortwave radiation transmitted through ice rather than that directly from theCH mouths when the CH is deeper than 0.01 m. Because the shortwave radiation transmitted through ice can reach the CH bottom regardless ofCH diameter, CH depth is unlikely to be correlated with CH diameter. The relationship is consistent with previous observationalstudies. Furthermore, the simulations highlighted that the difference in albedo between ice surface and CH bottom was a key factor for reproducingthe timing of CH collapse. It implies that lower ice surface albedo could induce CH collapse and thus cause further lowering of the albedo. Heatcomponent analysis suggests that CH depth is governed by the balance between the intensity of the diffuse component of downward shortwave radiationand the turbulent heat transfer. Therefore, these meteorological conditions may be important factors contributing to the recent surface darkening ofthe Greenland ice sheet and other glaciers via the redistribution of CHs.

    DOI: 10.5194/tc-17-3309-2023

    Web of Science

  10. A long-term mass-balance reconstruction (1974–2021) and a decadal in situ mass-balance record (2011–2021) of Rikha Samba Glacier, central Himalaya Reviewed International coauthorship

    Tika Ram Gurung, Rijan Bhakta Kayastha, Koji Fujita, Sharad Prasad Joshi, Anna Sinisalo, James D. Kirkham

    Journal of Glaciology   Vol. 69 ( 276 ) page: 723 - 736   2023.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    Abstract

    Despite their importance for regional water resource planning and as indicators of climate change, records of in situ glacier mass balance remain short and spatially sparse in the Himalaya. Here, we present an updated series of in situ mass-balance measurements from Rikha Samba Glacier, Nepal, between 2011 and 2021. The updated in situ mass balance is −0.39 ± 0.32 m w.e. for this period. We use an energy-mass balance model to extend the annual mass-balance series back to 1974. The model is forced using daily meteorological variables from ERA5-Land reanalysis data that is linearly bias-corrected using observations from an automatic weather station situated near the glacier terminus. The modeled mass balance is consistent with the in situ mass-balance series measured 2011–2021 and with previous glaciological and geodetic estimates. The model results indicate a mass balance of −0.56 ± 0.27 m w.e. a<sup>−1</sup> over the reconstruction period of 1974–2021, which is comparable to the mass losses experienced by other Himalayan glaciers during this time. An assessment of the sensitivity of the glacier mass balance to meteorological forcing suggests that a change in temperature of ±1 K has a stronger effect on the calculated mass balance compared to a ±20% change in either precipitation, or relative humidity, or solar radiation.

    DOI: 10.1017/jog.2022.93

    DOI: 10.1017/jog.2022.93

    Web of Science

    Other Link: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022000934

  11. Up-glacier propagation of surface lowering of Yala Glacier, Langtang Valley, Nepal Himalaya Reviewed International coauthorship

    Sojiro Sunako, Koji Fujita, Takeki Izumi, Satoru Yamaguchi, Akiko Sakai, Rijan Bhakta Kayastha

    Journal of Glaciology   Vol. 69 ( 274 ) page: 425 - 432   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    Abstract

    We quantify the surface elevation changes along Yala Glacier in Langtang Valley, Nepal Himalaya, since 1981 using geodetic methods to understand the recent evolution and current state of small debris-free glaciers across the region. We analyse differential global positioning system measurements and aerial stereo imagery that were acquired along Yala Glacier in 2007, 2009, 2012 and 2015 to generate digital elevation models for each calculation period. Continuous surface lowering has mainly been observed across the down-glacier area during the calculation periods, although a large degree of variability exists, with this lowering trend propagating up-glacier in recent years. The area-weighted glacier mass balances range from −0.98 ± 0.27 to −0.26 ± 0.30 m w.e. a<sup>−1</sup> for the five calculation periods (1981–2007, 2007–2009, 2009–2012, 2012–2015 and 2007–2015). These calculated mass-balance data reveal that Yala Glacier has undergone accelerated mass loss since the late 2000s, which is consistent with the results of previous in situ measurement and remote-sensing studies.

    DOI: 10.1017/jog.2022.118

    DOI: 10.1017/jog.2022.118

    Web of Science

    Other Link: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143022001186

  12. Multiscale Processes Leading to Heavy Precipitation in the Eastern Nepal Himalayas Reviewed International coauthorship

    Hidetaka Hirata, Hatsuki Fujinami, Hironari Kanamori, Yota Sato, Masaya Kato, Rijan B. Kayastha, Madan L. Shrestha, Koji Fujita

    Journal of Hydrometeorology   Vol. 24 ( 4 ) page: 641 - 658   2023.4

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Meteorological Society  

    Abstract

    The processes underlying heavy rainfall in the higher elevations of the Himalayas are still not well-known despite its importance. Here, we examine the detailed process causing a heavy rainfall event, observed by our rain gauge network in the Rolwaling valley, eastern Nepal Himalayas, using ERA5 reanalysis and a regional cloud-resolving numerical simulation. Heavy precipitation (112 mm day<sup>−1</sup>) was observed on July 8, 2019, at Dongang (2790 m above sea level). Most of the precipitation (81 mm) occurred during 19–23 local time (LT). The synoptic-scale environment is characterized by a monsoon low-pressure system (LPS) over northeastern India. The LPS lifted moisture upward from the lower troposphere and then horizontally transported it into the eastern Nepal Himalayas within the middle troposphere, increasing the content of the water vapor around Dongang. A mesoscale convective system passed over Dongang around the time of the intense precipitation. Numerical simulation showed surface heat fluxes prevailed under the middle tropospheric (~ 500hPa) southeasterly flow associated with the LPS around a mountain ridge on the upwind side of Dongang until 19 LT, enhancing convective instability. Topographic lifting led to the release of the enhanced instability, which triggered the development of a mesoscale precipitation system. The southeasterly flow pushed the precipitation system northward, which then passed over Dongang during 20–22 LT, resulting in heavy precipitation. Thus, we conclude that the heavy precipitation came from the multiscale processes such as three-dimensional moisture transport driven by the LPS and the diurnal variation in heat fluxes from the land surface.

    DOI: 10.1175/JHM-D-22-0080.1

    DOI: 10.1175/jhm-d-22-0080.1

    Web of Science

    Other Link: https://journals.ametsoc.org/downloadpdf/journals/hydr/aop/JHM-D-22-0080.1/JHM-D-22-0080.1.xml

  13. Evolution of snow algae, from cosmopolitans to endemics, revealed by DNA analysis of ancient ice Reviewed International coauthorship International journal

    Takahiro Segawa, Takahiro Yonezawa, Ryo Matsuzaki, Hiroshi Mori, Ayumi Akiyoshi, Francisco Navarro, Koji Fujita, Vladimir B. Aizen, Zhongqin Li, Shuhei Mano, Nozomu Takeuchi

    The ISME Journal   Vol. 17 ( 4 ) page: 491 - 501   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Recent studies of microbial biogeography have revealed the global distribution of cosmopolitans and dispersal of regional endemics, but little is known about how these processes are affected by microbial evolution. Here, we compared DNA sequences from snow/glacier algae found in an 8000-year-old ice from a glacier in central Asia with those from modern snow samples collected at 34 snow samples from globally distributed sites at the poles and mid-latitudes, to determine the evolutionary relationship between cosmopolitan and endemic phylotypes of snow algae. We further applied a coalescent theory–based demographic model to the DNA sequences. We found that the genus Raphidonema (Trebouxiophyceae) was distributed over both poles and mid-latitude regions and was detected in different ice core layers, corresponding to distinct time periods. Our results indicate that the modern cosmopolitan phylotypes belonging to Raphidonema were persistently present long before the last glacial period. Furthermore, endemic phylotypes originated from ancestral cosmopolitan phylotypes, suggesting that modern regional diversity of snow algae in the cryosphere is a product of microevolution. These findings suggest that the cosmopolitans dispersed across the world and then derived new localized endemics, which thus improves our understanding of microbial community formation by microevolution in natural environments.

    DOI: 10.1038/s41396-023-01359-3

    DOI: 10.1038/s41396-023-01359-3

    Web of Science

    PubMed

    Other Link: https://www.nature.com/articles/s41396-023-01359-3

  14. AsiaPEX: Challenges and Prospects in Asian Precipitation Research Reviewed International coauthorship

    Toru Terao, Shinjiro Kanae, Hatsuki Fujinami, Someshwar Das, A. P. Dimri, Subashisa Dutta, Koji Fujita, Azusa Fukushima, Kyung-Ja Ha, Masafumi Hirose, Jinkyu Hong, Hideyuki Kamimera, Rijan Bhakta Kayastha, Masashi Kiguchi, Kazuyoshi Kikuchi, Hyun Mee Kim, Akio Kitoh, Hisayuki Kubota, Weiquang Ma, Yaoming Ma, Millind Mujumdar, Masato I. Nodzu, Tomonori Sato, Z. Su, Shiori Sugimoto, Hiroshi G. Takahashi, Yuhei Takaya, Shuyu Wang, Kun Yang, Satoru Yokoi, Jun Matsumoto

    Bulletin of the American Meteorological Society   Vol. 104 ( 4 ) page: E884 - E908   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Meteorological Society  

    Abstract

    The Asian Precipitation Experiment (AsiaPEX) was initiated in 2019 to understand terrestrial precipitation over diverse hydroclimatological conditions for improved predictions, disaster reduction, and sustainable development across Asia under the framework of the Global Hydroclimatology Panel (GHP)/Global Energy and Water Exchanges (GEWEX). AsiaPEX is the successor to GEWEX Asian Monsoon Experiment (GAME, 1995-2005) and Monsoon Asian Hydro-Atmosphere Scientific Research and Prediction Initiative (MAHASRI, 2006-2016). While retaining the key objectives of the aforementioned projects, the scientific targets of AsiaPEX focus on land-atmosphere coupling and improvements to the predictability of the Asian hydroclimatological system. AsiaPEX was designed for both fine-scale hydroclimatological processes occurring at the land surface and the integrated Asian hydroclimatological system characterized by multiscale interactions. We adopt six approaches including observation, process studies, scale interactions, high-resolution hydrological modeling, field campaigns, and climate projection, which bridge gaps in research activities conducted in different regions. Collaboration with mesoscale and global modeling researchers is one of the core methods in AsiaPEX. We review these strategies based on the literature and our initial outcomes. These include the estimation and validation of high-resolution satellite precipitation, investigations of extreme rainfall mechanisms, field campaigns over the Maritime Continent and Tibetan Plateau, areas of significant impact on the entire AsiaPEX region, process studies on diurnal to interdecadal scale interactions, and evaluation of the predictabilities of climate models for long-term variabilities. We will conduct integrated observational and modeling initiative, the Asian Monsoon Year (AMY)-II around 2025-2028, whose strategies are the sub-regional observation platforms and integrated global analysis.

    DOI: 10.1175/BAMS-D-20-0220.1

    DOI: 10.1175/bams-d-20-0220.1

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    Other Link: https://journals.ametsoc.org/downloadpdf/journals/bams/aop/BAMS-D-20-0220.1/BAMS-D-20-0220.1.xml

  15. A WIGGLE-MATCHED 297-YR TREE-RING OXYGEN ISOTOPE RECORD FROM THAILAND: INVESTIGATING THE <sup>14</sup>C OFFSET INDUCED BY AIR MASS TRANSPORT FROM THE INDIAN OCEAN Reviewed International coauthorship

    Masaki Sano, Nathsuda Pumijumnong, Koji Fujita, Masataka Hakozaki, Fusa Miyake, Takeshi Nakatsuka

    Radiocarbon   Vol. 65 ( 2 ) page: 505 - 519   2023.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    ABSTRACT

    Regional offsets from Northern Hemisphere radiocarbon (<sup>14</sup>C) calibration curves are widely recognized for monsoon Asia and often hinder accurate <sup>14</sup>C dating. In this paper, we explore the possible linkage between summer monsoon intensity and <sup>14</sup>C offsets using tree-ring δ<sup>18</sup>O and <sup>14</sup>C data from Thailand. We developed a 297-yr floating tree-ring δ<sup>18</sup>O chronology comprising seven teak log-coffin samples from the Ban Rai rock shelter site, northwestern Thailand. The outermost ring of our chronology was estimated to date from 358–383 CE, within a 95.4% (2σ) probability range, based on a total of 10 <sup>14</sup>C measurements that were wiggle-matched against a mixed calibration curve evenly weighted from the IntCal20 and SHCal20 curves. Backward trajectory analysis showed that an intensified (weakened) summer monsoon detected in a modern tree-ring δ<sup>18</sup>O chronology was most likely to be induced by increased (decreased) air mass transport from the tropical Indian Ocean, which is an area of intense upwelling where the <sup>14</sup>C concentration is lower than the atmospheric <sup>14</sup>C level. However, partly because of the limited sample size and dating uncertainty, the direct linkage between the tree-ring δ<sup>18</sup>O series and <sup>14</sup>C records obtained from our teak log-coffin samples could not be statistically verified.

    DOI: 10.1017/RDC.2023.14

    Web of Science

  16. Climate and Surface Mass Balance at Glaciar Perito Moreno, Southern Patagonia Reviewed International coauthorship

    Masahiro Minowa, Pedro Skvarca, Koji Fujita

    Journal of Climate   Vol. 36 ( 2 ) page: 625 - 641   2023.1

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Meteorological Society  

    Abstract

    The mass budget of southern Patagonian glaciers is characterized by an extreme amount of surface ablation. To understand the processes controlling surface mass balance, we analyzed in situ data including meteorological variables and ablation stakes for the 25 years between 1996 and 2020 near the terminus of Glaciar Perito Moreno in southern Patagonia in South America. The mean annual temperature has increased over the study period at a rate of 0.2°C decade<sup>−1</sup>. An energy-balance model was applied to calculate a point surface mass balance, based on meteorological records. The average point surface mass balance is estimated to be −16.3 m water equivalent (w.e.) yr<sup>−1</sup> between 1996 and 2020, decreasing at a rate in the range from −0.4 to −0.9 m w.e. yr<sup>−1</sup> decade<sup>−1</sup>. The greatest contribution to the surface energy balance was due to the sensible heat flux, and its variation drove the surface mass balance variation. The meteorological and surface mass balance records were compared with the Southern Annular Mode and El Niño–Southern Oscillation, which change the atmospheric circulation over southern Patagonia and influence surface mass balance near the terminus of the glacier. Our long-term dataset investigates the detailed meteorological conditions and surface mass balance and their connection with the large-scale climate variability over the last 25 years, reported for the first time in Patagonia.

    DOI: 10.1175/JCLI-D-22-0294.1

    DOI: 10.1175/jcli-d-22-0294.1

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    Other Link: https://journals.ametsoc.org/downloadpdf/journals/clim/36/2/JCLI-D-22-0294.1.xml

  17. Increased oceanic dimethyl sulfide emissions in areas of sea ice retreat inferred from a Greenland ice core Reviewed

    Yutaka Kurosaki, Sumito Matoba, Yoshinori Iizuka, Koji Fujita, Rigen Shimada

    Communications Earth &amp; Environment   Vol. 3 ( 1 ) page: 327   2022.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Ocean phytoplankton are an important source of dimethyl sulfide, which influences marine cloud formation. Model studies suggest that declines in Arctic sea ice may lead to increased dimethyl sulfide emissions, however observational support is lacking. Here, we present a 55-year high-resolution ice core record of methane sulfonic acid flux, an oxidation product of dimethyl sulfide, from the southeast Greenland Ice Sheet. We infer temporal variations in ocean dimethyl sulfide emissions and find that springtime (April–June) fluxes of methane sulfonic acid correlate well with satellite-derived chlorophyll-a concentration in the Irminger Sea. Summertime (July–September) methane sulfonic acid fluxes were 3 to 6 times higher between 2002–2014 than 1972–2001. We attribute this to sea ice retreat day becoming earlier and a coincident increase in chlorophyll-a concentration in the adjacent open coastal waters.

    DOI: 10.1038/s43247-022-00661-w

    DOI: 10.1038/s43247-022-00661-w

    Web of Science

    Other Link: https://www.nature.com/articles/s43247-022-00661-w

  18. Multi-decadal monsoon characteristics and glacier response in High Mountain Asia Reviewed International coauthorship

    T E Shaw, E S Miles, D Chen, A Jouberton, M Kneib, S Fugger, T Ou, H-W Lai, K Fujita, W Yang, S Fatichi, F Pellicciotti

    Environmental Research Letters   Vol. 17 ( 10 ) page: 104001 - 104001   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP Publishing  

    Abstract

    Glacier health across High Mountain Asia (HMA) is highly heterogeneous and strongly governed by regional climate, which is variably influenced by monsoon dynamics and the westerlies. We explore four decades of glacier energy and mass balance at three climatically distinct sites across HMA by utilising a detailed land surface model driven by bias-corrected Weather Research and Forecasting meteorological forcing. All three glaciers have experienced long-term mass losses (ranging from −0.04 ± 0.09 to −0.59 ± 0.20 m w.e. a<sup>−1</sup>) consistent with widespread warming across the region. However, complex and contrasting responses of glacier energy and mass balance to the patterns of the Indian Summer Monsoon were evident, largely driven by the role snowfall timing, amount and phase. A later monsoon onset generates less total snowfall to the glacier in the southeastern Tibetan Plateau during May–June, augmenting net shortwave radiation and affecting annual mass balance (−0.5 m w.e. on average compared to early onset years). Conversely, timing of the monsoon’s arrival has limited impact for the Nepalese Himalaya which is more strongly governed by the temperature and snowfall amount during the core monsoon season. In the arid central Tibetan Plateau, a later monsoon arrival results in a 40 mm (58%) increase of May–June snowfall on average compared to early onset years, likely driven by the greater interaction of westerly storm events. Meanwhile, a late monsoon cessation at this site sees an average 200 mm (192%) increase in late summer precipitation due to monsoonal storms. A trend towards weaker intensity monsoon conditions in recent decades, combined with long-term warming patterns, has produced predominantly negative glacier mass balances for all sites (up to 1 m w.e. more mass loss in the Nepalese Himalaya compared to strong monsoon intensity years) but sub-regional variability in monsoon timing can additionally complicate this response.

    DOI: 10.1088/1748-9326/ac9008

    DOI: 10.1088/1748-9326/ac9008

    Web of Science

    Other Link: https://iopscience.iop.org/article/10.1088/1748-9326/ac9008/pdf

  19. Editorial: Debris-covered glaciers: Formation, governing processes, present status and future directions Invited International coauthorship

    Shukla Aparna, Nicholson Lindsey, Banerjee Argha, Fujita Koji, Quincey Duncan J.

    Frontiers in Earth Science   Vol. 10   2022.9

  20. Land- to lake-terminating transition triggers dynamic thinning of a Bhutanese glacier Reviewed International coauthorship

    Yota Sato, Koji Fujita, Hiroshi Inoue, Akiko Sakai, Karma

    The Cryosphere   Vol. 16 ( 6 ) page: 2643 - 2654   2022.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus GmbH  

    Abstract. There have been rapid increases in both the number andexpansion of the proglacial lakes across High Mountain Asia. However, therelationship between proglacial lakes and glacier dynamics remains unclearin the Himalayan region. Here we present the surface elevation, flow-velocity changes, and proglacial lake expansion of Thorthormi and Luggeglaciers in the Lunana region, Bhutanese Himalaya, during the 2000–2018period using photogrammetry and GPS survey data. The lake expansion andsurface lowering rates and flow-velocity field of Lugge Glacier, alake-terminating glacier, have remained approximately constant since 2000.Conversely, there have been accelerated proglacial lake expansion and a2-fold increase in the thinning rate of Thorthormi Glacier since 2011, aswell as a considerable speed-up in the flow-velocity field(&gt;150 m a−1). We reveal that the lake formation and transition of ThorthormiGlacier from a land- to lake-terminating glacier have triggered glacierspeed-up and rapid thinning via a positive (compressive) to negative(extensional) change in the emergence velocities. This study provides thefirst evidence of dynamic glacier changes that are associated withproglacial lake formation across the Himalayan region.

    DOI: 10.5194/tc-16-2643-2022

    DOI: 10.5194/tc-16-2643-2022

    Web of Science

    Other Link: https://tc.copernicus.org/articles/16/2643/2022/tc-16-2643-2022.pdf

  21. Mass Balance of Four Mongolian Glaciers: In-situ Measurements, Long-Term Reconstruction and Sensitivity Analysis Reviewed International coauthorship International journal

    Purevdagva Khalzan, Akiko Sakai, Koji Fujita

    Frontiers in Earth Science   Vol. 9   page: 785306   2022.1

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Frontiers Media SA  

    This study describes the <italic>in situ</italic> observed and modeled mass balances of four representative glaciers in the Mongolian Altai Mountains. Mass-balance stakes and automatic weather stations (AWS) were installed along each glacier to obtain the <italic>in situ</italic> mass balances and meteorological variables. We calibrate the ERA5 meteorological variables using the observed values, then estimate the precipitation parameters to obtain the observed point mass balances using an energy- and mass-balance model. We evaluate the mass-balance profile and glacier-wide mass balance via a mass-balance model using the calibrated ERA5 data and estimated precipitation parameters to fill in the spatial and temporal gaps in the stake networks and AWS measurements. We demonstrate that almost all of the observed mass balances have been in a negative state since 2003. We also reconstruct the long-term mass balances for the 1980–2018 period, which range from −760 to −160 mm water equivalent under the different climatic conditions (annual precipitation varies from 190 to 860 mm). We further evaluate the mass-balance sensitivities to temperature and precipitation changes. We confirm that both sensitivities correlate significantly with the annual precipitation; increased precipitation yields more negative sensitivity to temperature changes and less positive sensitivity to precipitation changes.

    DOI: 10.3389/feart.2021.785306

    Web of Science

  22. Soluble salts in deserts as a source of sulfate aerosols in an Antarctic ice core during the last glacial period Reviewed International journal

    Ryu Uemura, Kosuke Masaka, Yoshinori Iizuka, Motohiro Hirabayashi, Hitoshi Matsui, Risei Matsumoto, Miki Uemura, Koji Fujita, Hideaki Motoyama

    Earth and Planetary Science Letters   Vol. 578   page: 117299 - 117299   2022.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.epsl.2021.117299

    Web of Science

  23. Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya Reviewed International coauthorship International journal

    Akane Tsushima, Morihiro Miyahara, Tetsuhide Yamasaki, Nao Esashi, Yota Sato, Rijan B. Kayastha, Ang J. B. Lama Sherpa, Masaki Sano, Koji Fujita

    Annals of Glaciology   Vol. 62 ( 85-86 ) page: 353 - 359   2021.9

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press (CUP)  

    <title>Abstract</title>We drilled an 81.2-m-long ice core in the accumulation area (5860 m a.s.l.) of Trambau Glacier in the Rolwaling region during October–November 2019. The drilling operation was conducted with a lightweight electro-mechanical drill system after two reconnaissance fieldworks in 2017 and 2018, during which two shallow firn cores were drilled with a hand auger. The drill system and ice core samples were transported by helicopters at a high elevation of 6000 m a.s.l. A further challenging issue was the ice core transportation between Nepal and Japan, as no regular commercial flight was available for the frozen samples. The addition of dry ice imported from India immediately prior to leaving Nepal allowed the ice core samples to be successfully transported to a cold room in Japan, and remain in a frozen state. Stratigraphic observations during the drilling operation suggest the drill site has been affected by melting and refreezing.

    DOI: 10.1017/aog.2021.15

    Web of Science

  24. Anthropogenic Impacts on Tropospheric Reactive Chlorine Since the Preindustrial Reviewed International coauthorship International journal

    Shuting Zhai, Xuan Wang, Joseph R. McConnell, Lei Geng, Jihong Cole‐Dai, Michael Sigl, Nathan Chellman, Tomás Sherwen, Ryan Pound, Koji Fujita, Shohei Hattori, Jonathan M. Moch, Lei Zhu, Mat Evans, Michel Legrand, Pengfei Liu, Daniel Pasteris, Yuk‐Chun Chan, Lee T. Murray, Becky Alexander

    Geophysical Research Letters   Vol. 48 ( 14 ) page: e2021GL093808   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1029/2021GL093808

    Web of Science

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2021GL093808

  25. Twice‐Daily Monsoon Precipitation Maxima in the Himalayas Driven by Land Surface Effects Reviewed International coauthorship International journal

    Hatsuki Fujinami, Koji Fujita, Nobuhiro Takahashi, Tomonori Sato, Hironari Kanamori, Sojiro Sunako, Rijan B. Kayastha

    Journal of Geophysical Research: Atmospheres   Vol. 126 ( 13 )   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1029/2020JD034255

    Web of Science

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020JD034255

  26. Physically Based Summer Temperature Reconstruction From Melt Layers in Ice Cores Reviewed International journal

    Koji Fujita, Sumito Matoba, Yoshinori Iizuka, Nozomu Takeuchi, Akane Tsushima, Yutaka Kurosaki, Teruo Aoki

    Earth and Space Science   Vol. 8 ( 7 )   2021.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    Previous reconstructions of summer temperatures from ice cores have relied on a statistical relationship between a melt layer and temperature observed at nearby stations. This study presents a novel method for reconstructing summer temperatures from melt layers in ice cores using an energy balance model that incorporates heat conduction and meltwater refreezing in the firn. We use the seasonal patterns in the ERA-Interim reanalysis data set for an ice core site to calculate the amounts of refreezing water within the firn under various summer mean temperature (SMT) and annual precipitation conditions, and prepared calibration tables containing these three variables. We then estimate the SMTs from the refreezing amount and annual accumulation, both of which can be obtained from an ice core. We apply this method to four ice cores that were recovered from sites with different climates: two sites on the Greenland Ice Sheet, one in Alaska, and one in Russian Altai. The reconstructed SMTs show comparable variations with those of observed temperatures at nearby stations. The nonlinear relationship between SMT and melt layer thickness differs between sites, indicating that a single linear approximation cannot be employed to estimate SMT. Sensitivity analyses suggest that the annual temperature range, amount of annual precipitation, and firn albedo (which is a time-invariant value in the model) significantly affect the relationship between SMT and melt layer thickness. This new method provides an alternative to existing approaches and yields an independent estimate of SMT from ice cores that have been affected by melting.

    DOI: 10.1029/2020EA001590

    Web of Science

    Scopus

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020EA001590

  27. Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years Reviewed International coauthorship International journal

    Naoko Nagatsuka, Kumiko Goto-Azuma, Akane Tsushima, Koji Fujita, Sumito Matoba, Yukihiko Onuma, Remi Dallmayr, Moe Kadota, Motohiro Hirabayashi, Jun Ogata, Yoshimi Ogawa-Tsukagawa, Kyotaro Kitamura, Masahiro Minowa, Yuki Komuro, Hideaki Motoyama, Teruo Aoki

    Climate of the Past   Vol. 17 ( 3 ) page: 1341 - 1362   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus GmbH  

    Abstract. Our study is the first to demonstrate a
    high-temporal-resolution record of mineral composition in a Greenland ice
    core over the past 100 years. To reconstruct past variations in the sources
    and transportation processes of mineral dust in northwestern Greenland, we
    analysed the morphology and mineralogical composition of dust in the SIGMA-D
    ice core from 1915 to 2013 using scanning electron microscopy (SEM) and
    energy-dispersive X-ray spectroscopy (EDS). The results revealed that the
    ice core dust consisted mainly of silicate minerals and that the composition
    varied substantially on multi-decadal and inter-decadal scales, suggesting
    that the ice core minerals originated from different geological sources in
    different periods during the past 100 years. The multi-decadal variation
    trend differed among mineral types. Kaolinite, which generally formed in
    warm and humid climatic zones, was abundant in colder periods (1950–2004),
    whereas mica, chlorite, feldspars, mafic minerals, and quartz, which
    formed in arid, high-latitude, and local areas, were abundant in warmer
    periods (1915–1949 and 2005–2013). Comparison to Greenland surface
    temperature records indicates that multi-decadal variation in the relative
    abundance of these minerals was likely affected by local temperature changes
    in Greenland. Trajectory analysis shows that the minerals were transported
    mainly from the western coast of Greenland in the two warming periods, which
    was likely due to an increase in dust sourced from local ice-free areas as a
    result of shorter snow/ice cover duration in the Greenland coastal region
    during the melt season caused by recent warming. Meanwhile, ancient deposits
    in northern Canada, which were formed in past warmer climates, seem to be the
    best candidate during the colder period (1950–2004). Our results suggest
    that SEM–EDS analysis can detect variations in ice core dust sources during
    recent periods of low dust concentration.

    DOI: 10.5194/cp-17-1341-2021

    Web of Science

  28. Ice Cliff Dynamics of Debris-Covered Trakarding Glacier in the Rolwaling Region, Nepal Himalaya Reviewed International coauthorship International journal

    Yota Sato, Koji Fujita, Hiroshi Inoue, Sojiro Sunako, Akiko Sakai, Akane Tsushima, Evgeny A. Podolskiy, Rakesh Kayastha, Rijan B. Kayastha

    Frontiers in Earth Science   Vol. 9   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Frontiers Media SA  

    Ice cliffs can act as “hot spots” for melt on debris-covered glaciers and promote local glacier mass loss. Repeat high-resolution remote-sensing data are therefore required to monitor the role of ice cliff dynamics in glacier mass loss. Here we analyze high-resolution aerial photogrammetry data acquired during the 2007, 2018, and 2019 post-monsoon seasons to delineate and monitor the morphology, distribution, and temporal changes of the ice cliffs across the debris-covered Trakarding Glacier in the eastern Nepal Himalaya. We generate an ice cliff inventory from the 2018 and 2019 precise terrain data, with ice cliffs accounting for 4.7 and 6.1% of the debris-covered area, respectively. We observe large surface lowering (&amp;gt;2.0 m a<sup>−1</sup>) where there is a denser distribution of ice cliffs. We also track the survival, formation, and disappearance of ice cliffs from 2018 to 2019, and find that ∼15% of the total ice cliff area is replaced by new ice cliffs. Furthermore, we observe the overall predominance of northwest-facing ice cliffs, although we do observe spatial heterogeneities in the aspect variance of the ice cliffs (ice cliffs face in similar/various directions). Many new ice cliffs formed across the stagnant middle sections of the glacier, coincident with surface water drainage and englacial conduit intake observations. This spatial relationship between ice cliffs and the glacier hydrological system suggests that these englacial and supraglacial hydrological systems play a significant role in ice cliff formation.

    DOI: 10.3389/feart.2021.623623

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  29. Projected land ice contributions to twenty-first-century sea level rise Reviewed International coauthorship International journal

    Tamsin L. Edwards, Sophie Nowicki, Ben Marzeion, Regine Hock, Heiko Goelzer, Hélène Seroussi, Nicolas C. Jourdain, Donald A. Slater, Fiona E. Turner, Christopher J. Smith, Christine M. McKenna, Erika Simon, Ayako Abe-Ouchi, Jonathan M. Gregory, Eric Larour, William H. Lipscomb, Antony J. Payne, Andrew Shepherd, Cécile Agosta, Patrick Alexander, Torsten Albrecht, Brian Anderson, Xylar Asay-Davis, Andy Aschwanden, Alice Barthel, Andrew Bliss, Reinhard Calov, Christopher Chambers, Nicolas Champollion, Youngmin Choi, Richard Cullather, Joshua Cuzzone, Christophe Dumas, Denis Felikson, Xavier Fettweis, Koji Fujita, Benjamin K. Galton-Fenzi, Rupert Gladstone, Nicholas R. Golledge, Ralf Greve, Tore Hattermann, Matthew J. Hoffman, Angelika Humbert, Matthias Huss, Philippe Huybrechts, Walter Immerzeel, Thomas Kleiner, Philip Kraaijenbrink, Sébastien Le clec’h, Victoria Lee, Gunter R. Leguy, Christopher M. Little, Daniel P. Lowry, Jan-Hendrik Malles, Daniel F. Martin, Fabien Maussion, Mathieu Morlighem, James F. O’Neill, Isabel Nias, Frank Pattyn, Tyler Pelle, Stephen F. Price, Aurélien Quiquet, Valentina Radić, Ronja Reese, David R. Rounce, Martin Rückamp, Akiko Sakai, Courtney Shafer, Nicole-Jeanne Schlegel, Sarah Shannon, Robin S. Smith, Fiammetta Straneo, Sainan Sun, Lev Tarasov, Luke D. Trusel, Jonas Van Breedam, Roderik van de Wal, Michiel van den Broeke, Ricarda Winkelmann, Harry Zekollari, Chen Zhao, Tong Zhang, Thomas Zwinger

    Nature   Vol. 593 ( 7857 ) page: 74 - +   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Efficient statistical emulation of melting land ice under various climate scenarios to 2100 indicates a contribution from melting land ice to sea level increase of at least 13 centimetres sea level equivalent.The land ice contribution to global mean sea level rise has not yet been predicted(1) using ice sheet and glacier models for the latest set of socio-economic scenarios, nor using coordinated exploration of uncertainties arising from the various computer models involved. Two recent international projects generated a large suite of projections using multiple models(2-8), but primarily used previous-generation scenarios(9) and climate models(10), and could not fully explore known uncertainties. Here we estimate probability distributions for these projections under the new scenarios(11,12) using statistical emulation of the ice sheet and glacier models. We find that limiting global warming to 1.5 degrees Celsius would halve the land ice contribution to twenty-first-century sea level rise, relative to current emissions pledges. The median decreases from 25 to 13 centimetres sea level equivalent (SLE) by 2100, with glaciers responsible for half the sea level contribution. The projected Antarctic contribution does not show a clear response to the emissions scenario, owing to uncertainties in the competing processes of increasing ice loss and snowfall accumulation in a warming climate. However, under risk-averse (pessimistic) assumptions, Antarctic ice loss could be five times higher, increasing the median land ice contribution to 42 centimetres SLE under current policies and pledges, with the 95th percentile projection exceeding half a metre even under 1.5 degrees Celsius warming. This would severely limit the possibility of mitigating future coastal flooding. Given this large range (between 13 centimetres SLE using the main projections under 1.5 degrees Celsius warming and 42 centimetres SLE using risk-averse projections under current pledges), adaptation planning for twenty-first-century sea level rise must account for a factor-of-three uncertainty in the land ice contribution until climate policies and the Antarctic response are further constrained.

    DOI: 10.1038/s41586-021-03302-y

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    PubMed

    Other Link: http://www.nature.com/articles/s41586-021-03302-y

  30. Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control Reviewed International coauthorship International journal

    Shohei Hattori, Yoshinori Iizuka, Becky Alexander, Sakiko Ishino, Koji Fujita, Shuting Zhai, Tomás Sherwen, Naga Oshima, Ryu Uemura, Akinori Yamada, Nozomi Suzuki, Sumito Matoba, Asuka Tsuruta, Joel Savarino, Naohiro Yoshida

    Science Advances   Vol. 7 ( 19 ) page: eabd4610 - eabd4610   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Association for the Advancement of Science (AAAS)  

    After the 1980s, atmospheric sulfate reduction is slower than the dramatic reductions in sulfur dioxide (SO<sub>2</sub>) emissions. However, a lack of observational evidence has hindered the identification of causal feedback mechanisms. Here, we report an increase in the oxygen isotopic composition of sulfate (<inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><m:semantics definitionURL="" encoding=""><m:mrow><m:msup><m:mi mathvariant="normal">Δ</m:mi><m:mn>17</m:mn></m:msup><m:msub><m:mi mathvariant="normal">O</m:mi><m:mrow><m:msubsup><m:mi mathvariant="normal">SO</m:mi><m:mn>4</m:mn><m:mrow><m:mn>2</m:mn><m:mo>−</m:mo></m:mrow></m:msubsup></m:mrow></m:msub></m:mrow><m:annotation encoding="" /></m:semantics></m:math></inline-formula>) in a Greenland ice core, implying an enhanced role of acidity-dependent in-cloud oxidation by ozone (up to 17 to 27%) in sulfate production since the 1960s. A global chemical transport model reproduces the magnitude of the increase in observed <inline-formula><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><m:semantics definitionURL="" encoding=""><m:mrow><m:msup><m:mi mathvariant="normal">Δ</m:mi><m:mn>17</m:mn></m:msup><m:msub><m:mi mathvariant="normal">O</m:mi><m:mrow><m:msubsup><m:mi mathvariant="normal">SO</m:mi><m:mn>4</m:mn><m:mrow><m:mn>2</m:mn><m:mo>−</m:mo></m:mrow></m:msubsup></m:mrow></m:msub></m:mrow><m:annotation encoding="" /></m:semantics></m:math></inline-formula> with a 10 to 15% enhancement in the conversion efficiency from SO<sub>2</sub> to sulfate in Eastern North America and Western Europe. With an expected continued decrease in atmospheric acidity, this feedback will continue in the future and partially hinder air quality improvements.

    DOI: 10.1126/sciadv.abd4610

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    PubMed

  31. SIGMAと関連プロジェクトによるグリーンランド氷床上の大気・雪氷・雪氷微生物研究 - ArCS IIプロジェクトへのつながり -. Reviewed

    青木輝夫, 的場澄人, 庭野匡思, 朽木勝幸, 谷川朋範, 竹内望, 山口悟, 本山秀明, 藤田耕史, 山崎哲秀, 飯塚芳徳, 堀雅裕, 島田利元, 植竹淳, 永塚尚子, 大沼友貴彦, 橋本明弘, 石元裕史, 田中泰宙, 大島長, 梶野瑞王, 足立光司, 黒﨑豊, 杉山慎, 津滝俊, 東久美子, 八久保晶弘, 川上薫, 木名瀨健

    雪氷   Vol. 83 ( 2 ) page: 169 - 191   2021.3

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  32. Increasing dust emission from ice free terrain in southeastern Greenland since 2000 Reviewed International journal

    Tomomi Amino, Yoshinori Iizuka, Sumito Matoba, Rigen Shimada, Naga Oshima, Toshitaka Suzuki, Takuto Ando, Teruo Aoki, Koji Fujita

    Polar Science   Vol. 27   page: 100599 - 100599   2021.3

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    DOI: 10.1016/j.polar.2020.100599

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  33. SIGMA及び関連プロジェクトによるグリーンランド氷床上の大気・雪氷・雪氷微生物研究 : ArCSⅡプロジェクトへのつながり (極地雪氷特集)

    青木 輝夫, 的場 澄人, 庭野 匡思, 朽木 勝幸, 谷川 朋範, 竹内 望, 山口 悟, 本山 秀明, 藤田 耕史, 山崎 哲秀, 飯塚 芳徳, 堀 雅裕, 島田 利元, 植竹 淳, 永塚 尚子, 大沼 友貴彦, 橋本 明弘, 石元 裕史, 田中 泰宙, 大島 長, 梶野 瑞王, 足立 光司, 黒﨑 豊, 杉山 慎, 津滝 俊, 東 久美子, 八久保 晶弘, 川上 薫, 木名瀨 健

    雪氷 : journal of the Japanese Society of Snow and Ice   Vol. 83 ( 2 ) page: 169 - 191   2021.3

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    Language:Japanese   Publisher:日本雪氷学会  

    CiNii Books

  34. 氷床表面質量収支の実態とそのモデリングの試み:2020年夏最新版. Reviewed

    庭野匡思, 青木輝夫, 橋本明弘, 大島長, 梶野瑞王, 大沼友貴彦, 藤田耕史, 山口悟, 島田利元, 竹内望, 津滝俊, 本山秀明, 石井正好, 杉山慎, 平沢尚彦, 阿部彩子

    雪氷   Vol. 83 ( 1 ) page: 27 - 50   2021.1

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  35. Review of the current polar ice sheet surface mass balance and its modelling: the 2020 summer edition

    庭野匡思, 青木輝夫, 青木輝夫, 橋本明弘, 大島長, 梶野瑞王, 大沼友貴彦, 藤田耕史, 山口悟, 島田利元, 竹内望, 津滝俊, 津滝俊, 本山秀明, 石井正好, 杉山慎, 平沢尚彦, 阿部彩子, 阿部彩子

    雪氷   Vol. 83 ( 1 )   2021

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  36. Ice Core Drilling and the Related Observations at SE-Dome site, southeastern Greenland Ice Sheet Reviewed

    Yoshinori IIZUKA, Sumito MATOBA, Masahiro MINOWA, Tetsuhide YAMASAKI, Kaoru KAWAKAMI, Ayako KAKUGO, Morihiro MIYAHARA, Akihiro HASHIMOTO, Masashi NIWANO, Tomonori TANIKAWA, Koji FUJITA, Teruo AOKI

    Bulletin of Glaciological Research   Vol. 39   page: 1 - 12   2021

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japanese Society of Snow and Ice  

    DOI: 10.5331/bgr.21R01

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  37. The Second Deep Ice Coring at Dome Fuji, Antarctica Reviewed International coauthorship

    Antarctic Record   Vol. 64 ( 64 ) page: 284 - 329   2020.12

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    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: 10.15094/00016228

    CiNii Books

  38. GrSMBMIP: intercomparison of the modelled 1980–2012 surface mass balance over the Greenland Ice Sheet Reviewed International coauthorship International journal

    Xavier Fettweis, Stefan Hofer, Uta Krebs-Kanzow, Charles Amory, Teruo Aoki, Constantijn J. Berends, Andreas Born, Jason E. Box, Alison Delhasse, Koji Fujita, Paul Gierz, Heiko Goelzer, Edward Hanna, Akihiro Hashimoto, Philippe Huybrechts, Marie-Luise Kapsch, Michalea D. King, Christoph Kittel, Charlotte Lang, Peter L. Langen, Jan T. M. Lenaerts, Glen E. Liston, Gerrit Lohmann, Sebastian H. Mernild, Uwe Mikolajewicz, Kameswarrao Modali, Ruth H. Mottram, Masashi Niwano, Brice Noël, Jonathan C. Ryan, Amy Smith, Jan Streffing, Marco Tedesco, Willem Jan van de Berg, Michiel van den Broeke, Roderik S. W. van de Wal, Leo van Kampenhout, David Wilton, Bert Wouters, Florian Ziemen, Tobias Zolles

    The Cryosphere   Vol. 14 ( 11 ) page: 3935 - 3958   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus GmbH  

    Abstract. Observations and models agree that the Greenland Ice Sheet (GrIS)
    surface mass balance (SMB) has decreased since the end of the 1990s due to
    an increase in meltwater runoff and that this trend will accelerate in the
    future. However, large uncertainties remain, partly due to different
    approaches for modelling the GrIS SMB, which have to weigh physical
    complexity or low computing time, different spatial and temporal
    resolutions, different forcing fields, and different ice sheet
    topographies and extents, which collectively make an inter-comparison
    difficult. Our GrIS SMB model intercomparison project (GrSMBMIP) aims to
    refine these uncertainties by intercomparing 13 models of four types which
    were forced with the same ERA-Interim reanalysis forcing fields, except for
    two global models. We interpolate all modelled SMB fields onto a common ice
    sheet mask at 1 km horizontal resolution for the period 1980–2012 and score
    the outputs against (1) SMB estimates from a combination of gravimetric
    remote sensing data from GRACE and measured ice discharge; (2) ice cores,
    snow pits and in situ SMB observations; and (3) remotely sensed bare ice extent
    from MODerate-resolution Imaging Spectroradiometer (MODIS). Spatially, the
    largest spread among models can be found around the margins of the ice
    sheet, highlighting model deficiencies in an accurate representation of the
    GrIS ablation zone extent and processes related to surface melt and runoff.
    Overall, polar regional climate models (RCMs) perform the best compared to
    observations, in particular for simulating precipitation patterns. However,
    other simpler and faster models have biases of the same order as RCMs
    compared with observations and therefore remain useful tools for long-term
    simulations or coupling with ice sheet models. Finally, it is interesting to
    note that the ensemble mean of the 13 models produces the best estimate of
    the present-day SMB relative to observations, suggesting that biases are not
    systematic among models and that this ensemble estimate can be used as a
    reference for current climate when carrying out future model developments.
    However, a higher density of in situ SMB observations is required,
    especially in the south-east accumulation zone, where the model spread can
    reach 2 m w.e. yr−1 due to large discrepancies in modelled snowfall accumulation.

    DOI: 10.5194/tc-14-3935-2020

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  39. Partitioning the Uncertainty of Ensemble Projections of Global Glacier Mass Change Reviewed International coauthorship International journal

    Ben Marzeion, Regine Hock, Brian Anderson, Andrew Bliss, Nicolas Champollion, Koji Fujita, Matthias Huss, Walter W. Immerzeel, Philip Kraaijenbrink, Jan‐Hendrik Malles, Fabien Maussion, Valentina Radić, David R. Rounce, Akiko Sakai, Sarah Shannon, Roderik Wal, Harry Zekollari

    Earth's Future   Vol. 8 ( 7 ) page: e2019EF001470   2020.7

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    DOI: 10.1029/2019EF001470

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2019EF001470

  40. The influence of water percolation through crevasses on the thermal regime of a Himalayan mountain glacier Reviewed International coauthorship International journal

    Adrien Gilbert, Anna Sinisalo, Tika R. Gurung, Koji Fujita, Sudan B. Maharjan, Tenzing C. Sherpa, Takehiro Fukuda

    The Cryosphere   Vol. 14 ( 4 ) page: 1273 - 1288   2020.4

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    Abstract. In cold and arid climates, small glaciers with cold accumulation
    zones are often thought to be entirely cold based. However, scattering in
    ground-penetrating radar (GPR) measurements on the Rikha Samba Glacier in
    the Nepal Himalayas suggests a large amount of temperate ice that seems to
    be influenced by the presence of crevassed areas. We used a coupled
    thermo-mechanical model forced by a firn model accounting for firn heating
    to interpret the observed thermal regime. Using a simple energy conservation
    approach, we show that the addition of water percolation and refreezing in
    crevassed areas explains these observations. Model experiments show that
    both steady and transient thermal regimes are significantly affected by
    latent heat release in crevassed areas. This makes half of the glacier base
    temperate, resulting in an ice dynamic mainly controlled by basal friction
    instead of ice deformation. The timescale of thermal regime change, in
    response to atmospheric warming, is also greatly diminished, with a
    potential switch from cold to temperate basal ice in 50–60 years in the
    upper part of the glacier instead of the 100–150 years that it would take
    without the effect of the crevasses. This study highlights the crucial role
    of water percolation through the crevasses on the thermal regime of glaciers
    and validates a simple method to account for it in glacier thermo-mechanical
    models.

    DOI: 10.5194/tc-14-1273-2020

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  41. Contrasting thinning patterns between lake- and land-terminating glaciers in the Bhutanese Himalaya Reviewed International coauthorship International journal

    Tsutaki, Shun, Fujita, Koji, Nuimura, Takayuki, Sakai, Akiko, Sugiyama, Shin, Komori, Jiro, Tshering, Phuntsho

    CRYOSPHERE   Vol. 13 ( 10 ) page: 2733 - 2750   2019.10

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    Despite the importance of glacial lake development in ice dynamics and glacier thinning, in situ and satellite-based measurements from lake-terminating glaciers are sparse in the Bhutanese Himalaya, where a number of proglacial lakes exist. We acquired in situ and satellite-based observations across lake- and land-terminating debris-covered glaciers in the Lunana region, Bhutanese Himalaya. A repeated differential global positioning system survey reveals that thickness change of the debris-covered ablation area of the lake-terminating Lugge Glacier (-4.67 +/- 0.07 m a(-1)) is more than 3 times more negative than that of the land-terminating Thorthormi Glacier (-1 40 +/- 0.07 m a(-1)) for the 2004-2011 period. The surface flow velocities decrease down-glacier along Thorthormi Glacier, whereas they increase from the upper part of the ablation area to the terminus of Lugge Glacier. Numerical experiments using a two-dimensional ice flow model demonstrate that the rapid thinning of Lugge Glacier is driven by both a negative surface mass balance and dynamically induced ice thinning. However, the thinning of Thorthormi Glacier is minimised by a longitudinally compressive flow regime. Multiple supraglacial ponds on Thorthormi Glacier have been expanding since 2000 and have merged into a single proglacial lake, with the glacier terminus detaching from its terminal moraine in 2011. Numerical experiments suggest that the thinning of Thorthormi Glacier will accelerate with continued proglacial lake development.

    DOI: 10.5194/tc-13-2733-2019

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  42. Mass balance of Trambau Glacier, Rolwaling region, Nepal Himalaya: in-situ observations, long-term reconstruction and mass-balance sensitivity Reviewed International coauthorship International journal

    Sunako, Sojiro, Fujita, Koji, Sakai, Akiko, Kayastha, Rijan B.

    JOURNAL OF GLACIOLOGY   Vol. 65 ( 252 ) page: 605 - 616   2019.8

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    We conducted a mass-balance study of debris-free Trambau Glacier in the Rolwaling region, Nepal Himalaya, which is accessible to 6000 m a.s.l., to better understand mass-balance processes and the effect of precipitation on these processes on high-elevation Himalayan glaciers. Continuous in situ meteorological and mass-balance observations that spanned the three melt seasons from May 2016 are reported. An energy- and mass-balance model is also applied to evaluate its performance and sensitivity to various climatic conditions. Glacier-wide mass balances ranging from -0.34 +/- 0.38 m w.e. in 2016 to -0.82 +/- 0.53 m w.e. in 2017/18 are obtained by combining the observations with model results for the areas above the highest stake. The estimated long-term glacier mass balance, which is reconstructed using the ERA-Interim data calibrated with in situ data, is -0.65 +/- 0.39 m w.e. a(-1) for the 1980-2018 period. A significant correlation with annual precipitation (r = 0.77, p < 0.001) is observed, whereas there is no discernible correlation with summer mean air temperature. The results indicate the continuous mass loss of Trambau Glacier over the last four decades, which contrasts with the neighbouring Mera Glacier in balance.

    DOI: 10.1017/jog.2019.37

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  43. Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials Reviewed International journal

    Goto-Azuma K, Hirabayashi M, Motoyama H, Miyake T, Kuramoto T, Uemura R, Igarashi M, Iizuka Y, Sakurai T, Horikawa S, Suzuki K, Suzuki T, Fujita K, Kondo Y, Hattori S, Fujii Y

    Nature Communications   Vol. 10 ( 1 ) page: 324   2019.7

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    © 2019, The Author(s). Marine biogenic sulphur affects Earth’s radiation budget and may be an indicator of primary productivity in the Southern Ocean, which is closely related to atmospheric CO2 variability through the biological pump. Previous ice-core studies in Antarctica show little climate dependence of marine biogenic sulphur emissions and hence primary productivity, contradictory to marine sediment records. Here we present new 720,000-year ice core records from Dome Fuji in East Antarctica and show that a large portion of non-sea-salt sulphate, which was traditionally used as a proxy for marine biogenic sulphate, likely originates from terrestrial dust during glacials. By correcting for this, we make a revised calculation of biogenic sulphate and find that its flux is reduced in glacial periods. Our results suggest reduced dimethylsulphide emissions in the Antarctic Zone of the Southern Ocean during glacials and provide new evidence for the coupling between climate and the Southern Ocean sulphur cycle.

    DOI: 10.1038/s41467-019-11128-6

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  44. Influence of summer sublimation on δD, δ<sup>18</sup>O and δ<sup>17</sup>O in precipitation, East Antarctica, and implications for climate reconstruction from ice cores Reviewed International coauthorship International journal

    Pang HX, Hou SG, Landais A, Masson-Delmotte V, Jouzel J, Steen-Larsen HC, Risi C, Zhang WB, Wu SY, Li YS, An CL, Wang YT, Prie F, Minster B, Falourd S, Stenni B, Scarchilli C, Fujita K, Grigioni P

    Journal of Geophysical Research: Atmospheres   Vol. 124 ( 13 ) page: 7339 - 7358   2019.7

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    DOI: 10.1029/2018JD030218

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  45. Viscoelastic modeling of nocturnal thermal fracturing in a Himalayan debris-covered glacier Reviewed International coauthorship International journal

    Podolskiy EA, Fujita K, Sunako S, Sato Y

    Journal of Geophysical Research: Earth Surface   Vol. 124 ( 6 ) page: 1485 - 1515   2019.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union (AGU)  

    DOI: 10.1029/2018JF004848

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2018JF004848

  46. Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: validation, sources, and implications on glacier runoff Reviewed International coauthorship

    Santra S, Verma S, Fujita K, Chakraborty I, Boucher O, Takemura T, Burkhart JF, Matt F, Sharma M

    Atmospheric Chemistry and Physics   Vol. 19 ( 4 ) page: 2441 - 2460   2019.2

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    DOI: 10.5194/acp-19-2441-2019

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  47. Assessment for paleoclimatic utility of biomass burning tracers in SE-Dome ice core, Greenland Reviewed International coauthorship

    Fahmida Parvin, Osamu Seki, Koji Fujita, Yoshinori Iizuka, Sumito Matoba, Takuto Ando, Ken Sawada

    Atmospheric Environment   Vol. 196   page: 86 - 94   2019.1

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    © 2018 The Authors We provide continuous records of biomass burning molecular tracers (levoglucosan and dehydroabietic acid) in a Greenland ice core collected from the Southeastern Dome (the SE-Dome ice core) over the past several decades to assess the paleoclimatic utility of these tracers in Greenland ice cores. An air mass backward-trajectory analysis indicates that eastern Canada is likely the primary source region of the biomass burning tracers. Comparisons of levoglucosan and dehydroabietic acid data in the SE-Dome ice core and area burned (vegetation fire) events in Canada suggests that the biomass burning tracers in the ice core document most of the pronounced biomass burning events in eastern Canada over the past several decades, confirming that analyses of biomass burning molecular tracers in Greenland ice cores are useful to reconstruct the frequency of significant biomass burning events in a local region. However, our study also highlights that the wind pattern when the biomass burning occurs is decisive for the registration of a biomass burning event in an ice core even though long-term changes in the wind regime associated with decadal-scale climate oscillations do not significantly influence the transport and deposition of biomass burning tracers on the Greenland ice sheet.

    DOI: 10.1016/j.atmosenv.2018.10.012

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  48. Annual layer counting using pollen grains of the Grigoriev ice core from the Tien Shan Mountains, central Asia Reviewed International coauthorship International journal

    Takeuchi N, Sera S, Fujita K, Aizen VB, Kubota J

    Arctic, Antarctic, and Alpine Research   Vol. 51 ( 1 ) page: 299 - 312   2019

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    Pollen grains are commonly found in ice cores, particularly those from mountain glaciers at low to middle latitudes. Because the release of pollen from flowers has a seasonality and varies among the plant species, pollen concentrations in ice cores are useful for distinguishing annual or seasonal layers and inferring past vegetation near glaciers. We analyzed major pollen grains in an 87-m-deep ice core drilled at the top of the Grigoriev Ice Cap (4563 m.a.s.l.) in the Tien Shan Mountains, Kyrgyz Republic. Microscopy showed that mainly five pollen taxa were contained in the ice core. Their abundance fluctuated with the depth of the core, indicating their seasonal deposition on the ice cap, while the seasonality of the stable isotopes was not particularly clear because of melting and refreezing signatures. Based on the pollen profiles, annual layers were determined back in time to 1780 AD at a depth of 63.6 m; at greater depth, they could not be distinguished due to ice layer thinning in the glacier. The pollen assemblages have gradually changed during the last 220 years and were particularly distinctive in the deeper part, suggesting the drastic change of vegetation in this region during the Holocene.

    DOI: 10.1080/15230430.2019.1638202

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  49. Status and Change of the Cryosphere in the Extended Hindu Kush Himalaya Region Invited Reviewed International coauthorship

    Bolch Tobias, Shea Joseph M., Liu Shiyin, Azam Farooq M., Gao Yang, Gruber Stephan, Immerzeel Walter W., Kulkarni Anil, Li Huilin, Tahir Adnan A., Zhang Guoqing, Zhang Yinsheng, Bannerjee Argha, Berthier Etienne, Brun Fanny, Kaab Andreas, Kraaijenbrink Phillip, Moholdt Geir, Nicholson Lindsey, Pepin Nicholas, Racoviteanu Adina, Fujita Koji

    HINDU KUSH HIMALAYA ASSESSMENT: MOUNTAINS, CLIMATE CHANGE, SUSTAINABILITY AND PEOPLE     page: 209 - 255   2019

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    DOI: 10.1007/978-3-319-92288-1_7

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  50. Nocturnal thermal fracturing of a Himalayan debris-covered glacier revealed by ambient seismic noise Reviewed International coauthorship

    Podolskiy EA, Fujita K, Sunako S, Tsushima A, Kayastha RB

    Geophysical Research Letters   Vol. 45 ( 18 ) page: 9699 - 9709   2018.9

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    DOI: 10.1029/2018GL079653

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  51. Demographic analysis of cyanobacteria based on the mutation rates estimated from an ancient ice core Reviewed International coauthorship

    Takahiro Segawa, Nozomu Takeuchi, Koji Fujita, Vladimir B. Aizen, Eske Willerslev, Takahiro Yonezawa

    Heredity   Vol. 120 ( 6 ) page: 562 - 573   2018.6

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    Despite the crucial role of cyanobacteria in various ecosystems, little is known about their evolutionary histories, especially microevolutionary dynamics, because of the lack of knowledge regarding their mutation rates. Here we directly estimated cyanobacterial mutation rates based on ancient DNA analyses of ice core samples collected from Kyrgyz Republic that dates back to ~12,500 cal years before present. We successfully sequenced the 16S rRNA and 16S-23S internal transcribed spacer (ITS) region. Two cyanobacterial operational taxonomic units (OTUs) were detected from the ancient ice core samples, and these OTUs are shared with those from the modern glacier surface. The mutation rate of ITS region was estimated by comparing ancient and modern populations, and were at the magnitude of 10-7substitutions/sites/year. By using a model selection framework, we also demonstrated that the ancient sequences from the ice sample were not contaminated from modern samples. Bayesian demographic analysis based on coalescent theory revealed that cyanobacterial population sizes increased over Asia regions during the Holocene. Thus, our results enhance our understanding of the enigmatic timescale of cyanobacterial microevolution, which has the potential to elucidate the environmental responses of cyanobacteria to the drastic climatic change events of the Quaternary.

    DOI: 10.1038/s41437-017-0040-3

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  52. Use of Water Balance and Tracer-Based Approaches to Monitor Groundwater Recharge in the Hyper-Arid Gobi Desert of Northwestern China Reviewed International coauthorship

    Akiyama T, Kubota J, Fujita K, Tsujimura M, Nakawo M, Avtar R, Kharrazi A

    Environments   Vol. 5 ( 5 ) page: 55 - 15   2018.5

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    The groundwater recharge mechanism in the hyper-arid Gobi Desert of Northwestern China was analyzed using water balance and tracer-based approaches. Investigations of evaporation, soil water content, and their relationships with individual rainfall events were conducted from April to August of 2004. Water sampling of rainwater, groundwater, and surface water was also conducted. During this period, 10 precipitation events with a total amount of 41.5 mm, including a maximum of 28.9 mm, were observed. Evaporation during the period was estimated to be 33.1 mm. Only the soil water, which was derived from the heaviest precipitation, remained in the vadose zone. This is because a dry surface layer, which was formed several days after the heaviest precipitation event, prevented evaporation. Prior to that, the heaviest precipitation rapidly infiltrated without being affected by evaporation. This is corroborated by the isotopic evidence that both the heaviest precipitation and the groundwater retained no trace of significant kinetic evaporation. Estimated δ-values of the remaining soil water based on isotopic fractionation and its mass balance theories also demonstrated no trace of kinetic fractionation in the infiltration process. Moreover, stable isotopic compositions of the heaviest precipitation and the groundwater were very similar. Therefore, we concluded that the high-intensity precipitation, which rapidly infiltrated without any trace of evaporation, was the main source of the groundwater.

    DOI: 10.3390/environments5050055

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  53. Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years Reviewed International coauthorship

    Ryu Uemura, Hideaki Motoyama, Valérie Masson-Delmotte, Jean Jouzel, Kenji Kawamura, Kumiko Goto-Azuma, Shuji Fujita, Takayuki Kuramoto, Motohiro Hirabayashi, Takayuki Miyake, Hiroshi Ohno, Koji Fujita, Ayako Abe-Ouchi, Yoshinori Iizuka, Shinichiro Horikawa, Makoto Igarashi, Keisuke Suzuki, Toshitaka Suzuki, Yoshiyuki Fujii

    Nature Communications   Vol. 9 ( 1 ) page: 961   2018.3

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    The δD temperature proxy in Antarctic ice cores varies in parallel with CO2 through glacial cycles. However, these variables display a puzzling asynchrony. Well-dated records of Southern Ocean temperature will provide crucial information because the Southern Ocean is likely key in regulating CO2 variations. Here, we perform multiple isotopic analyses on an Antarctic ice core and estimate temperature variations at this site and in the oceanic moisture source over the past 720,000 years, which extend the longest records by 300,000 years. Antarctic temperature is affected by large variations in local insolation that are induced by obliquity. At the obliquity periodicity, the Antarctic and ocean temperatures lag annual mean insolation. Further, the magnitude of the phase lag is minimal during low eccentricity periods, suggesting that secular changes in the global carbon cycle and the ocean circulation modulate the phase relationship among temperatures, CO2 and insolation in the obliquity frequency band.

    DOI: 10.1038/s41467-018-03328-3

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  54. NHM-SMAP: Spatially and temporally high-resolution nonhydrostatic atmospheric model coupled with detailed snow process model for Greenland Ice Sheet Reviewed

    Masashi Niwano, Teruo Aoki, Akihiro Hashimoto, Sumito Matoba, Satoru Yamaguchi, Tomonori Tanikawa, Koji Fujita, Akane Tsushima, Yoshinori Iizuka, Rigen Shimada, Masahiro Hori

    Cryosphere   Vol. 12 ( 2 ) page: 635 - 655   2018.2

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    To improve surface mass balance (SMB) estimates for the Greenland Ice Sheet (GrIS), we developed a 5ĝ€̄km resolution regional climate model combining the Japan Meteorological Agency Non-Hydrostatic atmospheric Model and the Snow Metamorphism and Albedo Process model (NHM-SMAP) with an output interval of 1ĝ€̄h, forced by the Japanese 55-year reanalysis (JRA-55). We used in situ data to evaluate NHM-SMAP in the GrIS during the 2011-2014 mass balance years. We investigated two options for the lower boundary conditions of the atmosphere: an offline configuration using snow, firn, and ice albedo, surface temperature data from JRA-55, and an online configuration using values from SMAP. The online configuration improved model performance in simulating 2ĝ€̄m air temperature, suggesting that the surface analysis provided by JRA-55 is inadequate for the GrIS and that SMAP results can better simulate physical conditions of snow/firn/ice. It also reproduced the measured features of the GrIS climate, diurnal variations, and even a strong mesoscale wind event. In particular, it successfully reproduced the temporal evolution of the GrIS surface melt area extent as well as the record melt event around 12 July 2012, at which time the simulated melt area extent reached 92.4ĝ€̄%. Sensitivity tests showed that the choice of calculation schemes for vertical water movement in snow and firn has an effect as great as 200ĝ€̄Gtĝ€̄year-1 in the GrIS-wide accumulated SMB estimates
    a scheme based on the Richards equation provided the best performance.

    DOI: 10.5194/tc-12-635-2018

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    Scopus

  55. Review of the status and mass changes of Himalayan-Karakoram glaciers Reviewed International coauthorship

    Mohd Farooq Azam, Patrick Wagnon, Etienne Berthier, Christian Vincent, Koji Fujita, Jeffrey S. Kargel

    Journal of Glaciology   Vol. 64 ( 243 ) page: 61 - 74   2018.2

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    We present a comprehensive review of the status and changes in glacier length (since the 1850s), area and mass (since the 1960s) along the Himalayan-Karakoram (HK) region and their climate-change context. A quantitative reliability classification of the field-based mass-balance series is developed. Glaciological mass balances agree better with remotely sensed balances when we make an objective, systematic exclusion of likely flawed mass-balance series. The Himalayan mean glaciological mass budget was similar to the global average until 2000, and likely less negative after 2000. Mass wastage in the Himalaya resulted in increasing debris cover, the growth of glacial lakes and possibly decreasing ice velocities. Geodetic measurements indicate nearly balanced mass budgets for Karakoram glaciers since the 1970s, consistent with the unchanged extent of supraglacial debris-cover. Himalayan glaciers seem to be sensitive to precipitation partly through the albedo feedback on the short-wave radiation balance. Melt contributions from HK glaciers should increase until 2050 and then decrease, though a wide range of present-day area and volume estimates propagates large uncertainties in the future runoff. This review reflects an increasing understanding of HK glaciers and highlights the remaining challenges.

    DOI: 10.1017/jog.2017.86

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    Scopus

  56. A 60 Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland Reviewed

    Yoshinori Iizuka, Ryu Uemura, Koji Fujita, Shohei Hattori, Osamu Seki, Chihiro Miyamoto, Toshitaka Suzuki, Naohiro Yoshida, Hideaki Motoyama, Sumito Matoba

    Journal of Geophysical Research: Atmospheres   Vol. 123 ( 1 ) page: 574 - 589   2018.1

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    ©2017. American Geophysical Union. All Rights Reserved. The Southeastern Greenland Dome (SE-Dome) has both a high elevation and a high accumulation rate (1.01 m we yr−1), which are suitable properties for reconstructing past environmental changes with a high time resolution. For this study, we measured the major ion fluxes in a 90 m ice core drilled from the SE-Dome region in 2015 and present the records of annual ion fluxes from 1957 to 2014. From 1970 to 2010, the trend of nonsea-salt (nss) SO42− flux decreases, whereas that for NH4+ increases, tracking well with the anthropogenic SOx and NH3 emissions mainly from North America. The result suggests that these fluxes reflect histories of the anthropogenic SOx and NH3 emissions. In contrast, the decadal trend of NO3− flux differs from the decreasing trend of anthropogenic NOx emissions. Although the cause of this discrepancy remains unclear, it may be related to changes in particle formation processes and chemical scavenging rates caused by an increase in sea salt and dust and/or a decrease in nssSO42−. We also find a high average NO3− flux (1.13 mmol m−2 yr−1) in the ice core, which suggests a negligible effect from postdepositional NO3− loss. Thus, the SE-Dome region is an excellent location for reconstructing nitrate fluxes. Over a decadal time scale, our NO3− flux record is similar to those from other ice cores in Greenland high-elevation sites, suggesting that NO3− concentration records from these ice cores are reliable.

    DOI: 10.1002/2017JD026733

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  57. Surface lowering of the debris-covered area of Kanchenjunga Glacier in the eastern Nepal Himalaya since 1975, as revealed by Hexagon KH-9 and ALOS satellite observations Reviewed

    Damodar Lamsal, Koji Fujita, Akiko Sakai

    CRYOSPHERE   Vol. 11 ( 6 ) page: 2815 - 2827   2017.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:COPERNICUS GESELLSCHAFT MBH  

    This study presents the geodetic mass balance of Kanchenjunga Glacier, one of the largest debris-covered glaciers in the easternmost Nepal Himalaya, which possesses a negative mass balance of -0.18 +/- 0.17mw.e.a(-1) for the 1975-2010 study period, estimated using digital elevation models (DEMs) generated from Hexagon KH-9 and ALOS PRISM stereo images. Accurate DEMs, with a relative uncertainty of +/- 5.5 m, were generated from the intensive and manual editing of triangulated irregular network (TIN) models on a stereo MirrorTM/3D Monitor. The glacier ice-flow velocity field was also calculated using a feature-tracking method that was applied to two ALOS orthoimages taken in 2010. The elevation differences between the two DEMs highlight considerable surface lowering across the debriscovered area, and a slight thickening in the accumulation area of Kanchenjunga Glacier between 1975 and 2010. The magnitude and gradient of surface lowering are similar among the six glacier tributaries, even though they are situated at different elevations, which may reflect variations in the iceflow velocity field. The pattern of surface lowering correlates well with the ice-flow velocity field over the debriscovered portion of the main tributary, suggesting that the glacier dynamics significantly affect surface lowering by altering the emergence velocity along the glacier, particularly in the compressive ablation area. Surface-lowering patterns partially correspond to the supraglacial pond area fraction of the glacier, with enhanced surface lowering observed in areas that possess a larger pond area fraction. These findings support the hypothesis that supraglacial ponds may intensify ice wastage and play a key role in the heterogeneous surface lowering of debris-covered glaciers. The estimated mass loss of Kanchenjunga Glacier is moderate compared with other debris-covered glaciers in neighboring Himalayan regions, which may be due to the lower pond area fraction of Kanchenjunga Glacier relative to other glaciers.

    DOI: 10.5194/tc-11-2815-2017

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  58. Seasonal-Scale Dating of a Shallow Ice Core From Greenland Using Oxygen Isotope Matching Between Data and Simulation Reviewed

    Ryoto Furukawa, Ryu Uemura, Koji Fujita, Jesper Sjolte, Kei Yoshimura, Sumito Matoba, Yoshinori Iizuka

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 122 ( 20 ) page: 10873 - 10887   2017.10

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    A precise age scale based on annual layer counting is essential for investigating past environmental changes from ice core records. However, subannual scale dating is hampered by the irregular intraannual variabilities of oxygen isotope (delta O-18) records. Here we propose a dating method based on matching the delta O-18 variations between ice core records and records simulated by isotope-enabled climate models. We applied this method to a new delta O-18 record from an ice core obtained from a dome site in southeast Greenland. The close similarity between the delta O-18 records from the ice core and models enables correlation and the production of a precise age scale, with an accuracy of a few months. A missing delta O-18 minimum in the 1995/1996 winter is an example of an indistinct delta O-18 seasonal cycle. Our analysis suggests that the missing delta O-18 minimum is likely caused by a combination of warm air temperature, weak moisture transport, and cool ocean temperature. Based on the age scale, the average accumulation rate from 1960 to 2014 is reconstructed as 1.02 m yr(-1) in water equivalent. The annual accumulation rate shows an increasing trend with a slope of 3.6 mm yr(-1), which is mainly caused by the increase in the autumn accumulation rate of 2.6 mm yr(-1). This increase is likely linked to the enhanced hydrological cycle caused by the decrease in Arctic sea ice area. Unlike the strong seasonality of precipitation amount in the ERA reanalysis data in the southeast dome region, our reconstructed accumulation rate suggests a weak seasonality.

    DOI: 10.1002/2017JD026716

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  59. Contrasting glacier responses to recent climate change in high-mountain Asia Reviewed

    Akiko Sakai, Koji Fujita

    SCIENTIFIC REPORTS   Vol. 7 ( 1 ) page: 13717   2017.10

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    Recent studies of Asian glaciers have shown that glaciers in eastern Karakoram and West Kunlun have been slightly gaining mass while those in nearby Jammu Kashmir and Himalayas are losing mass, at rates of more than 0.5 m w.e.yr(-1) and about 0.3 m w.e.yr-1, respectively. Two possible explanations have been proposed for this difference in glacier behaviour: spatial heterogeneity in climate change (climatic forcing) or differing glacier responses to climate change (glacier response). However, neither explanation has strong supporting evidence. Here, we examine the glacial response by calculating the mass-balance sensitivity to temperature change in high-mountain Asia. In support of the glacier-response explanation, we find a strong correlation between observed glacier surface-elevation changes and mass-balance sensitivity of glaciers. The high coefficient of determination (R-2 = 0.61) suggests that spatially heterogeneous mass-balance sensitivity has more explanatory power than regionally different climate change for the recent contrasting glacier fluctuations in the high mountain Asia.

    DOI: 10.1038/s41598-017-14256-5

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    PubMed

  60. Downwasting of the debris-covered area of Lirung Glacier in Langtang Valley, Nepal Himalaya, from 1974 to 2010 Reviewed

    Takayuki Nuimura, Koji Fujita, Akiko Sakai

    QUATERNARY INTERNATIONAL   Vol. 455   page: 93 - 101   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Despite the widespread shrinkage of debris-covered Himalayan glaciers in recent decades, the underlying processes driving these changes are poorly understood. This study presents recent mass-balance data for the debris-covered area of Lirung Glacier in Langtang Valley, Nepal Himalaya, constrained using multi-temporal, remotely sensed digital elevation models calibrated to in situ GPS survey data, and surface-flow velocity data from phase-only correlation. The results indicate surface lowering of between -1.3 and -1.8 m a(-1) during the study period ( 1974-2010), with accelerated glacier thinning after 2000. Similarly, we observed a decline in emergence velocity in the upper debris-covered area since 2000. We argue that this deceleration plays a key role in surface lowering, in contrast to declining surface mass balance, which we suggest is a residual effect of emergence velocity and surface lowering. Taken together, our findings indicate that the recent increase in surface lowering is attributable to the declining flux of ice from the upper to lower debris-covered areas of Lirung Glacier. Furthermore, this pattern suggests that downwasting of the upper debris-covered area will be augmented by a positive feedback between surface lowering and decelerated flow velocity. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.

    DOI: 10.1016/j.quaint.2017.06.066

    Web of Science

  61. Topographic controls on the debris-cover extent of glaciers in the Eastern Himalayas: Regional analysis using a novel high-resolution glacier inventory Reviewed

    Sunal Ojha, Koji Fujita, Akiko Sakai, Hiroto Nagai, Damodar Lamsal

    QUATERNARY INTERNATIONAL   Vol. 455   page: 82 - 92   2017.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    To better understand the influence of topography on the formation of Himalayan debris-covered glaciers, we manually digitized 5301 glaciers, covering an area of 5691 +/- 893 km(2), from high-resolution Advanced Land Observing Satellite imagery, and identified 842 debris-covered glaciers with a debris-covered area of 3839 +/- 753 km(2). This estimation of the debris-covered area of these glaciers is a novel approach in the Eastern Himalayas. We investigated the relationship between the debris-covered area and the corresponding potential debris supply (PDS) slopes for the debris-covered glaciers across the region. The PDS slopes on the southern side show better correlation with their debris-covered area formation than those situated on the northern side of the Himalayan barrier, with this correlation weakening toward the western massifs. Further investigation showed that PDS slopes oriented SE to Wexert a stronger control on the formation of debris-covered areas, which is related to the diurnal freezeethaw cycle on the southern slope of the mountain barrier. (C) 2017 Elsevier Ltd and INQUA. All rights reserved.

    DOI: 10.1016/j.quaint.2017.08.007

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  62. Evaluating the Scale and Potential of GLOF in the Bhutan Himalayas Using a Satellite-Based Integral Glacier-Glacial Lake Inventory Reviewed

    Hiroto Nagai, Jinro Ukita, Chiyuki Narama, Koji Fujita, Akiko Sakai, Takeo Tadono, Tsutomu Yamanokuchi, Nobuhiro Tomiyama

    GEOSCIENCES   Vol. 7 ( 3 ) page: 77   2017.9

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    A comprehensive glacier-glacial lake inventory was developed for the Bhutan Himalayas based on satellite observations between 1987-1990 and 2006-2011. In total, 733 lakes (covering 82.6 km(2)) were delineated between 4000 and 6000 m a.s.l. and their relationships to associated glaciers were documented. Using this new inventory, the scale and potential for glacial lake outburst flooding (GLOF) based on multiple criteria was examined. This included a history of connectivity characteristics of glacial lakes to mother glaciers, potential flood volumes, and debris-cover of mother glaciers in addition to the conventional criteria of expansion rate and lake size. The majority of the lakes with high expansion rates (more than double in size) and large areas (> 0.1 km(2)) met the conditions of being continuously in contact with a mother debris-covered glacier for nearly 20 years. Based on these multiple criteria, two lakes were identified as having potential for large-scale GLOF. Potentially dangerous glacial lakes listed in the International Centre for Integrated Mountain Development (ICIMOD) study were re-visited, and some overlaps with the glacier-glacial lake inventory were found.

    DOI: 10.3390/geosciences7030077

    Web of Science

  63. Debris-covered glacier anomaly? Morphological factors controlling changes in the mass balance, surface area, terminus position, and snow line altitude of Himalayan glaciers Reviewed

    Franco Salerno, Sudeep Thakuri, Gianni Tartari, Takayuki Nnimura, Sojiro Sunako, Akiko Sakai, Koji Fujita

    EARTH AND PLANETARY SCIENCE LETTERS   Vol. 471   page: 19 - 31   2017.8

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    What are the main morphological factors that control the heterogeneous responses of debris covered glaciers to climate change in the southern central Himalaya? A debate is open whether thinning rates on debris covered glaciers are comparable to those of debris free ones. Previous studies have adopted a deterministic approach, which is indispensable, but is also limiting in that only a few glaciers can be monitored. In this context, we propose a statistical analysis based on a wider glacier population as a complement to these deterministic studies. We analysed 28 glaciers situated on the southern slopes of Mt. Everest in the central southern Himalaya during the period 1992-2008. This study combined data compiled by three distinct studies for a common period and population of glaciers for use in a robust statistical analysis. Generally, surface gradient was the main morphological factor controlling the features and responses of the glaciers to climate change. In particular, the key points that emerged are as follows. 1) Reduced downstream surface gradient is responsible for increased glacier thinning. 2) The development of supraglacial ponds is a further controlling factor of glacier thinning: where supraglacial ponds develop, the glaciers register further surface lowering. 3) Debris coverage and thickness index were not found to be significantly responsible for the development of supraglacial ponds, changes in elevation, or shifts in snow line altitude. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.epsl.2017.04.039

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  64. Anomalous winter-snow-amplified earthquake-induced disaster of the 2015 Langtang avalanche in Nepal Reviewed

    Koji Fujita, Hiroshi Inoue, Takeki Izumi, Satoru Yamaguchi, Ayako Sadakane, Sojiro Sunako, Kouichi Nishimura, WalterW. Immerzeel, Joseph M. Shea, Rijan B. Kayastha, Takanobu Sawagaki, David F. Breashears, Hiroshi Yagi, Akiko Sakai

    NATURAL HAZARDS AND EARTH SYSTEM SCIENCES   Vol. 17 ( 5 ) page: 749 - 764   2017.5

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    Coseismic avalanches and rockfalls, as well as their simultaneous air blast and muddy flow, which were induced by the 2015 Gorkha earthquake in Nepal, destroyed the village of Langtang. In order to reveal volume and structure of the deposit covering the village, as well as sequence of the multiple events, we conducted an intensive in situ observation in October 2015. Multitemporal digital elevation models created from photographs taken by helicopter and unmanned aerial vehicles reveal that the deposit volumes of the primary and succeeding events were 6.81 +/- 1.54 x 10(6) and 0.84 +/- 0.92 x 10(6) m(3), respectively. Visual investigations of the deposit and witness statements of villagers suggest that the primary event was an avalanche composed mostly of snow, while the collapsed glacier ice could not be dominant source for the total mass. Succeeding events were multiple rockfalls which may have been triggered by aftershocks. From the initial deposit volume and the area of the upper catchment, we estimate an average snow depth of 1.82 +/- 0.46m in the source area. This is consistent with anomalously large snow depths (1.28-1.52 m) observed at a neighboring glacier (4800-5100ma.s.l.), which accumulated over the course of four major snowfall events between October 2014 and the earthquake on 25 April 2015. Considering long-term observational data, probability density functions, and elevation gradients of precipitation, we conclude that this anomalous winter snow was an extreme event with a return interval of at least 100 years. The anomalous winter snowfall may have amplified the disastrous effects induced by the 2015 Gorkha earthquake in Nepal.

    DOI: 10.5194/nhess-17-749-2017

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  65. State dependence of climatic instability over the past 720,000 years from Antarctic ice cores and climate modeling Reviewed

    Kenji Kawamura, Ayako Abe-Ouchi, Hideaki Motoyama, Yutaka Ageta, Shuji Aoki, Nobuhiko Azuma, Yoshiyuki Fujii, Koji Fujita, Shuji Fujita, Kotaro Fukui, Teruo Furukawa, Atsushi Furusaki, Kumiko Goto-Azuma, Ralf Greve, Motohiro Hirabayashi, Takeo Hondoh, Akira Hori, Shinichiro Horikawa, Kazuho Horiuchi, Makoto Igarashi, Yoshinori Iizuka, Takao Kameda, Hiroshi Kanda, Mika Kohno, Takayuki Kuramoto, Yuki Matsushi, Morihiro Miyahara, Takayuki Miyake, Atsushi Miyamoto, Yasuo Nagashima, Yoshiki Nakayama, Takakiyo Nakazawa, Fumio Nakazawa, Fumihiko Nishio, Ichio Obinata, Rumi Ohgaito, Akira Oka, Jun'ichi Okuno, Junichi Okuyama, Ikumi Oyabu, Frederic Parrenin, Frank Pattyn, Fuyuki Saito, Takashi Saito, Takeshi Saito, Toshimitsu Sakurai, Kimikazu Sasa, Hakime Seddik, Yasuyuki Shibata, Kunio Shinbori, Keisuke Suzuki, Toshitaka Suzuki, Akiyoshi Takahashi, Kunio Takahashi, Shuhei Takahashi, Morimasa Takata, Yoichi Tanaka, Ryu Uemura, Genta Watanabe, Okitsugu Watanabe, Tetsuhide Yamasaki, Kotaro Yokoyama, Masakazu Yoshimori, Takayasu Yoshimoto

    SCIENCE ADVANCES   Vol. 3 ( 2 ) page: e1600446   2017.2

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    Climatic variabilities on millennial and longer time scales with a bipolar seesaw pattern have been documented in paleoclimatic records, but their frequencies, relationships with mean climatic state, and mechanisms remain unclear. Understanding the processes and sensitivities that underlie these changes will underpin better understanding of the climate system and projections of its future change. We investigate the long-term characteristics of climatic variability using a new ice-core record from Dome Fuji, East Antarctica, combined with an existing long record from the Dome C ice core. Antarctic warming events over the past 720,000 years are most frequent when the Antarctic temperature is slightly below average on orbital time scales, equivalent to an intermediate climate during glacial periods, whereas interglacial and fully glaciated climates are unfavourable for a millennial-scale bipolar seesaw. Numerical experiments using a fully coupled atmosphere-ocean general circulation model with freshwater hosing in the northern North Atlantic showed that climate becomes most unstable in intermediate glacial conditions associated with large changes in sea ice and the Atlantic Meridional Overturning Circulation. Model sensitivity experiments suggest that the prerequisite for the most frequent climate instabilitywith bipolar seesaw pattern during the late Pleistocene era is associated with reduced atmospheric CO2 concentration via global cooling and sea ice formation in the North Atlantic, in addition to extended Northern Hemisphere ice sheets.

    DOI: 10.1126/sciadv.1600446

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    PubMed

  66. A firn densification process in the high accumulation dome of southeastern Greenland Reviewed

    Yoshinori Iizuka, Atsushi Miyamoto, Akira Hori, Sumito Matoba, Ryoto Furukawa, Takeshi Saito, Shuji Fujita, Motohiro Hirabayashi, Satoru Yamaguchi, Koji Fujita, Nozomu Takeuchi

    ARCTIC ANTARCTIC AND ALPINE RESEARCH   Vol. 49 ( 1 ) page: 13 - 27   2017.2

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    We examine a firn core from a dome in southeast Greenland that exhibits distinct firn densification. The ice was-20.9 degrees C at 20 m depth, and the core gives an average accumulation rate of 1.0 m w.e. yr(-1) in water equivalent. However, the close-off density of 830 kg m(-3) occurs at 83.4-86.8 m depth, which is about 20-m shallower than that obtained from two empirical models. Where the density p &gt; 750 kg m(-3), the densification appears faster than that from the empirical models. As a result, compared to the empirical coefficient, the actual compactive viscosity coefficient is nonlinear and decreases at p &gt; 750 kg m(-3), indicating that the fun with a higher density is softer than that from the empirical result. We argue here that the high accumulation rate creates a high overburden pressure in a short time. Thus, the relative softness of the firn may arise from (1) there being not enough time to form bonds between grains as strong as those in a lower accumulation-rate area, and similarly, (2) the dislocation density in the firn being relatively high.

    DOI: 10.1657/AAAR0016-034

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  67. Precipitation regime and stable isotopes at Dome Fuji, East Antarctica Reviewed

    Dittmann A, Schlosser E, Masson-Delmotte V, Powers JG, Manning KW, Werner M, Fujita K

    Atmospheric Chemistry and Physics   Vol. 16 ( 11 ) page: 6883-6900   2016.6

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    DOI: 10.5194/acp-16-6883-2016

  68. Glacier area shrinkage in eastern Nepal Himalaya since 1992 using high-resolution inventories from aerial photographs and ALOS satellite images Reviewed

    Ojha S, Fujita K, Asahi K, Sakai A, Lamsal D, Nuimura T, Nagai H

    Journal of Glaciology   Vol. 62 ( 233 ) page: 512-524   2016.4

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    DOI: 10.1017/jog.2016.61

  69. Abrupt and moderate climate changes in the mid-latitudes of Asia during the Holocene Reviewed

    Aizen EM, Aizen VB, Takeuchi N, Mayewski PA, Grigholm B, Joswiak DR, Nikitin SA, Fujita K, Nakawo M, Zapf A, Schwikowski M

    Journal of Glaciology   Vol. 62 ( 233 ) page: 411-439   2016.4

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    DOI: 10.1017/jog.2016.34

  70. Inconsistent relations among major ions and water stable isotopes in Antarctic snow under different accumulation environments Reviewed

    Hoshina Y, Fujita K, Iizuka Y, Motoyama H

    Polar Science   Vol. 10 ( 1 ) page: 1-10   2016.3

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    DOI: 10.1016/j.polar.2015.12.003

  71. Heterogeneity in supraglacial debris thickness and its role in glacier mass changes of the Mount Gongga Reviewed

    Zhang Y, Hirabayashi Y, Fujita K, Liu SY, Liu Q

    Science China Earth Sciences   Vol. 59 ( 1 ) page: 170-184   2016.1

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    DOI: 10.1007/s11430-015-5118-2

  72. Geomorphic and geologic controls of geohazards induced by Nepal's 2015 Gorkha earthquake Reviewed

    Kargel JS, Leonard GJ, Shugar DH, Haritashya UK, Bevington A, Fielding EJ, Fujita K, Geertsema M, Miles ES, Steiner J, Anderson E, Bajracharya S, Bawden GW, Breashears DF, Byers A, Collins B, Dhital MR, Donnellan A, Evans TL, Geai ML, Glasscoe MT, Green D, Gurung DR, Heijenk R, Hilborn A, Hudnut K, Huyck C, Immerzeel WW, Jian LM, Jibson R, Kääb A, Khanal NR, Kirschbaum D, Kraaijenbrink PDA, Lamsal D, Liu SY, Lv MY, McKinney D, Nahirnick NK, Nan ZT, Ojha S, Olsenholler J, Painter TH, Pleasants M, Pratima KC, Yuan QI, Raup BH, Regmi D, Rounce DR, Sakai A, Shangguan DH, Shea JM, Shrestha AB, Shukla A, Stumm D, van der Kooij M, Voss K, Wang X, Weihs B, Wolfe D, Wu LZ, Yao XJ, Yoder MR, Young N

    Science   Vol. 351 ( 6269 ) page: aac8353   2016.1

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    DOI: 10.1126/science.aac8353

  73. Comparison of multiple glacier inventories with a new inventory derived from high-resolution ALOS imagery in the Bhutan Himalaya Reviewed

    Nagai H, Fujita K, Sakai A, Nuimura T, Tadono T

    The Cryosphere   Vol. 10 ( 1 ) page: 65-85   2016.1

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    DOI: 10.5194/tc-10-65-2016

  74. First in situ record of decadal glacier mass balance (2003-2014) from the Bhutan Himalaya Reviewed

    Tshering P, Fujita K

    Annals of Glaciology,   Vol. 57 ( 71 ) page: 289-294   2016.1

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    DOI: 10.3189/2016AoG71A036

  75. Historically unprecedented global glacier decline in the early 21st century Reviewed

    Zemp M, Frey H, Gärtner-Roer I, Nussbaumer SU, Hoelzle M, Paul F, Haeberli W, Denzinger F, Ahlstrøm AP, Anderson B, Bajracharya S, Baroni C, Braun LN, Cáceres BE, Casassa G, Cobos G, Dávila LR, Delgado Granados H, Demuth MN, Espizua L, Fischer A, Fujita K, Gadek B, Ghazanfar A, Hagen JO, Holmlund P, Karimi N, Li ZQ, Pelto M, Pitte P, Popovnin VV, Portocarrero CA, Prinz R, Sangewar CV, Severskiy I, Sigurðsson O, Soruco A, Usubaliev R, Vincent C

    Journal of Glaciology,   Vol. 61 ( 228 ) page: 745-761   2015.8

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    DOI: 10.3189/2015JoG15J017

  76. Climate regime of Asian glaciers revealed by GAMDAM Glacier Inventory Reviewed

    Sakai A, Nuimura T, Fujita K, Takenaka S, Nagai H, Lamsal D

    The Cryosphere   Vol. 9   page: 865-880   2015.5

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    DOI: 10.5194/tc-9-865-2015

  77. The GAMDAM glacier inventory: a quality controlled inventory of Asian glaciers Reviewed

    Nuimura T, Sakai A, Taniguchi K, Nagai H, Lamsal D, Tsutaki S, Kozawa A, Hoshina Y, Takenaka S, Omiya S, Tsunematsu K, Tshering P, Fujita K

    The Cryosphere,   Vol. 9   page: 849-864   2015.5

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    DOI: 10.5194/tc-9-849-2015

  78. The disappearance of glaciers in the Tien Shan Mountains in Central Asia at the end of Pleistocene Reviewed

    Takeuchi N, Fujita K, Aizen VB, Narama C, Yokoyama Y, Okamoto S, Naoki K, Kubota J

    Quaternary Science Reviews   Vol. 103   page: 26-33   2014.9

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    DOI: 10.1016/j.quascirev.2014.09.006

  79. Snow particle speeds in drifting snow Reviewed

    Nishimura K, Yokoyama C, Ito Y, Nemoto M, Naaim-Bouvet F, Bellot H, Fujita K

    Journal of Geophysical Research - Atmospheres   Vol. 119 ( 16 ) page: 9901-9913   2014.8

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    DOI: 10.1002/2014JD021686.

  80. Modelling runoff from a Himalayan debris-covered glacier Reviewed

    Fujita K, Sakai A

    Hydrology and Earth System Sciences   Vol. 18 ( 7 ) page: 2679-2694   2014.7

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    DOI: 10.5194/hess-18-2679-2014

  81. Effect of accumulation rate on water stable isotopes of near-surface snow in inland Antarctica Reviewed

    Hoshina Y, Fujita K, Nakazawa F, Iizuka Y, Miyake T, Hirabayashi M, Kuramoto T, Fujita S, Motoyama H

    Journal of Geophysical Research - Atmospheres   Vol. 119 ( 1 ) page: 274-283   2014.2

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    DOI: 10.1002/2013JD020771

  82. ヒマラヤ氷河スキャンダルとその後 Invited Reviewed

    藤田耕史

    雪氷   Vol. 76 ( 1 ) page: 69-78   2014.1

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  83. 中国西部・七一氷河における表面の雪と氷および降水の化学組成 Reviewed

    三宅隆之, 植竹淳, 的場澄人, 坂井亜規子, 藤田耕史, 藤井理行, Yao TD, 中尾正義

    雪氷   Vol. 76 ( 1 ) page: 105-114   2014.1

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  84. May-September precipitation in the Bhutan Himalaya since 1743 as reconstructed from tree ring cellulose d18O Reviewed

    Sano M, Tshering P, Komori J, Fujita K, Xu C, Nakatsuka T

    Journal of Geophysical Research - Atmospheres   Vol. 118 ( 5 ) page: 8399-8410   2013.8

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    DOI: 10.1002/jgrd.50664

  85. Southwest-facing slopes control the formation of debris-covered glaciers in the Bhutan Himalaya Reviewed

    Nagai H, Fujita K, Nuimura T, Sakai A

    The Cryosphere   Vol. 7 ( 4 ) page: 1303-1314   2013.8

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    DOI: 10.5194/tc-7-1303-2013

  86. Potential flood volume of Himalayan glacial lakes Reviewed

    Fujita K, Sakai A, Takenaka S, Nuimura T, Surazakov AB, Sawagaki T, Yamanokuchi T

    Natural Hazards and Earth System Sciences   Vol. 13 ( 7 ) page: 1827-1839   2013.7

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    DOI: 10.5194/nhess-13-1827-2013

  87. Changes in ice thickness and flow velocity of Yala Glacier, Langtang Himal, Nepal, from 1982 to 2009 Reviewed

    Sugiyama S, Fukui K, Fujita K, Tone K, Yamaguchi S

    Annals of Glaciology   Vol. 54 ( 64 ) page: 157-162   2013.7

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    DOI: 10.3189/2013AoG64A111

  88. Energy and mass balance of the Zhadang Glacier surface, central Tibetan Plateau Reviewed

    Zhang GS, Kang SC, Fujita K, Huintjes E, Xu JQ, Yamazaki T, Haginoya S, Yang W, Scherer D, Schneider C, Yao TD

    Journal of Glaciology   Vol. 59 ( 213 ) page: 137-148   2013.2

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    DOI: 10.3189/2013JoG12J152

  89. DNA analysis for section identification of individual Pinus pollen grains from Belukha glacier, Altai Mountains, Russia Reviewed

    Nakazawa F, Uetake J, Suyama Y, Kaneko R, Takeuchi N, Fujita K, Motoyama H, Imura S, Kanda H

    Environmental Research Letters   Vol. 8 ( 1 ) page: 014032   2013.2

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    DOI: 10.1088/1748-9326/8/1/014032

  90. Modeling glacier behavior under different precipitation seasonalities Reviewed

    Yamaguchi S, Fujita K

    Arctic, Antarctic, and Alpine Research   Vol. 45 ( 1 ) page: 143-152   2013.2

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    DOI: 10.1657/1938-4246-45.1.143

  91. River runoff over 2000 years in the arid Heihe River Basin, northwestern China Invited Reviewed

    Fujita K, Sakai A

    PAGES news   Vol. 20 ( 2 ) page: 76-77   2012.12

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  92. Outline of research project on glacial lake outburst floods in the Bhutan Himalayas Invited Reviewed

    Fujita K, Nishimura K, Komori J, Iwata S, Ukita J, Tadono T, Koike T

    Global Environmental Research   Vol. 16 ( 1 ) page: 3-12   2012.7

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  93. Variation in suspended sediment concentration of supraglacial lakes on debris-covered area of Lirung Glacier in Nepali Himalayas Invited Reviewed

    Takeuchi N, Sakai A, Kohshima S, Fujita K, Nakawo M

    Global Environmental Research   Vol. 16 ( 1 ) page: 95-104   2012.7

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  94. Elevation changes of glaciers revealed by multi-temporal digital elevation models calibrated by GPS survey in the Khumbu region, Nepal Himalayas, 1992-2008 Reviewed

    Nuimura T, Fujita K, Yamaguchi S, Sharma RR

    Journal of Glaciology   Vol. 58 ( 210 ) page: 648-656   2012.5

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    DOI: 10.3189/2012JoG11J061

  95. Variations in discharge from the Qilian mountains, northwest China, and its effect on the agricultural communities of the Heihe basin, over the last two millennia Reviewed

    Sakai A, Inoue M, Fujita K, Narama C, Kubota J, Nakawo M, Yao TD

    Water History   Vol. 4 ( 2 ) page: 177-196   2012.4

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    DOI: 10.1007/s12685-012-0057-8

  96. The state and fate of Himalayan glaciers Reviewed

    Bolch T, Kulkarni A, Kääb A, Huggel C, Paul F, Cogley JG, Frey H, Kargel JS, Fujita K, Scheel M, Stoffel M, Bajracharya S

    Science   Vol. 336 ( 6079 ) page: 310-314   2012.4

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    DOI: 0036-8075/1095-9203

  97. The rates of sea salt sulfatization in the atmosphere and surface snow of inland Antarctica Reviewed

    Iizuka Y, Tsuchimoto A, Hoshina Y, Sakurai T, Hansson M, Karlin T, Fujita K, Nakazawa F, Motoyama H, Fujita S

    Journal of Geophysical Research - Atmospheres   Vol. 117   page: D04308   2012.2

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    DOI: 10.1029/2011JD016378

  98. Distribution of debris thickness and its effect on ice melt at Hailuogou glacier, southeastern Tibetan Plateau, using in situ surveys and ASTER imagery Reviewed

    Zhang Y, Fujita K, Liu SY, Liu Q, Nuimura T

    Journal of Glaciology   Vol. 57 ( 206 ) page: 1147-1157   2011.12

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    DOI: 10.3189/002214311798843331

  99. Spatial and temporal variability of snow accumulation rate on the East Antarctic ice divide between Dome Fuji and EPICA DML Reviewed

    Fujita S, Holmlund P, Andersson I, Brown I, Enomoto H, Fujii Y, Fujita K, Fukui K, Furukawa T, Hansson M, Hara K, Hoshina Y, Igarashi M, Iizuka Y, Imura S, Ingvander S, Karlin T, Motoyama H, Nakazawa F, Oerter H, Sjöberg LE, Sugiyama S, Surdyk S, Ström J, Uemura R, Wilhelms F

    The Cryosphere   Vol. 5 ( 4 ) page: 1057-1081   2011.11

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    DOI: 10.5194/tc-5-1057-2011

  100. Spatially heterogeneous wastage of Himalayan glaciers Reviewed

    Fujita K, Nuimura T

    Proceedings of the National Academy of Sciences of the United States of America   Vol. 108 ( 34 ) page: 14011-14014   2011.8

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    DOI: 10.1073/pnas.1106242108

  101. Glacial lake inventory of Bhutan using ALOS data: Part I: methods and preliminary results Reviewed

    Ukita J, Narama C, Tadono T, Yamanokuchi T, Tomiyama N, Kawamoto S, Abe C, Uda T, Yabuki H, Fujita K, Nishimura K

    Annals of Glaciology   Vol. 52 ( 58 ) page: 65-71   2011.8

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    DOI: 10.3189/172756411797252293

  102. Favorable climatic regime for maintaining the present-day geometry of the Gregoriev Glacier, Inner Tien Shan Reviewed

    Fujita K, Takeuchi N, Nikitin SA, Surazakov AB, Okamoto S, Aizen VB, Kubota J

    The Cryosphere   Vol. 5 ( 3 ) page: 539-549   2011.7

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    DOI: 10.5194/tc-5-539-2011

  103. Temporal changes in elevation of the debris-covered ablation area of Khumbu Glacier in the Nepal Himalaya since 1978 Reviewed

    Nuimura T, Fujita K, Fukui K, Asahi K, Aryal R, Ageta Y

    Arctic, Antarctic, and Alpine Research   Vol. 43 ( 2 ) page: 246-255   2011.5

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    DOI: 10.1657/1938-4246-43.2.246

  104. Establishing the timing of chemical deposition events on Belukha glacier, Altai Mountains, Russia, using pollen analysis Reviewed

    Nakazawa F, Miyake T, Fujita K, Takeuchi N, Uetake J, Fujiki T, Aizen VB, Nakawo M

    Arctic, Antarctic, and Alpine Research   Vol. 43 ( 1 ) page: 66-72   2011.3

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    DOI: 10.1657/1938-4246-43.1.66

  105. Climate Change: Another Antarctic rhythm Invited

    Fujita K

    Nature   Vol. 471 ( 7336 ) page: 45-46   2011.3

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    DOI: 10.1038/471045a

  106. Evidence for propagation of cold-adapted yeast in an ice core from a Siberian Altai glacier Reviewed

    Uetake J, Kohshima S, Nakazawa F, Takeuchi N, Fujita K, Miyake T, Narita H, Aizen VB, Nakawo M

    Journal of Geophysical Research - Biogeosciences   Vol. 116   page: G01019   2011.2

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    DOI: 10.1029/2010JG001337

  107. Reevaluation of the reconstruction of summer temperatures from melt features in Belukha ice cores, Siberian Altai Reviewed

    Okamoto S, Fujita K, Narita H, Uetake J, Takeuchi N, Miyake T, Nakazawa F, Aizen VB, Nikitin SA, Nakawo M

    Journal of Geophysical Research - Atmospheres   Vol. 116   page: D02110   2011.1

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    DOI: 10.1029/2010JD013977

  108. Self-regulated fluctuations in the ablation of a snow patch over four decades Reviewed

    Fujita K, Hiyama K, Iida H, Ageta Y

    Water Resources Research   Vol. 46   page: W11541   2010.11

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    We describe four decades of temporal fluctuations in the ablation of the Hamaguriyuki snow patch in the northern Japan Alps. Annual ablation depth through the melting season shows a significant correlation with the initial depth (at the beginning of the melting season), whereas a less significant correlation is found with a temperature index that is generally believed to correlate well with ablation. The scale effect of the snow patch, which appears to modify the wind speed over the patch, has a more significant effect on snow ablation than does the radiation shadowing effect of surrounding mountains. In the case of a thinner and therefore smaller initial springtime snow patch, the speed of the local wind may be reduced over the snow surface, thereby suppressing ablation, whereas wind speed is not reduced (and ablation is not suppressed) in the case of a thicker snow patch. This self‐regulating feedback means that over the past four decades, the thickness of the snow patch has fluctuated in a manner that is largely independent of summertime temperature. Our findings also suggest that the self‐regulating feedback, which influences ablation, allows some small wind‐drifted glaciers to survive, whereas previous studies reported enhanced accumulation at such glaciers via a similar topographic effect on wind speed and suppressed ablation via the shading effect of surrounding mountains on solar radiation.

  109. Reconstructions of annual discharge and equilibrium line altitude of glaciers at Qilian Shan, northwest China, from 1978 to 2002. Reviewed

    Sakai A, Fujita K, Narama C, Kubota J, Nakawo M, Yao TD

    Hydrological Processes, 24(19), .   Vol. 24 ( 19 ) page: 2798-2806   2010.9

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    Discharge was calculated from a mountainous area, including discharge from glaciers, in the Qilian Shan (Qilian Mountains) of northwest China. The studied Yingluoxia basin is 9983 km2 in area, with glaciers making up 0·3% of the basin. The calculation method was based on the heat balance, requiring only daily temperature and precipitation. Calculated annual discharge from the basin corresponded well with the observed data. Calculated annual discharge from glaciers was 3·6% of the total discharge from the basin.

    The temporal trend of the calculated equilibrium line altitude (ELA) at the July 1st Glacier (western side of the Yingluoxia basin) was similar to that of the observed ELA. The calculated annual mass balance of glaciers within the Yingluoxia basin has a larger negative value than the other glaciers in China, as the ratio of accumulation area to the total glacier area in the Yingluoxia basin is much lower than in neighbouring basins to the west.
    doi:10.1002/hyp.7700

  110. ヒマラヤにおける氷河縮小の実態をさぐる Invited

    藤田耕史

    遺伝   Vol. 64 ( 5 ) page: 68-74   2010.9

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  111. Characteristics of high-precipitation events in Dronning Maud Land, Antarctica. Reviewed

    Schlosser E, Manning KW, Powers JG, Duda MG, Birnbaum G, Fujita K

    Journal of Geophysical Research - Atmospheres   Vol. 115   page: D14107   2010.7

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    High-resolution Antarctic Mesoscale Prediction System archive data were used to investigate high-precipitation events at the deep ice core drilling site Kohnen Station, Dronning Maud Land, Antarctica, during the period 2001–2006. The precipitation is found to be highly episodic, with, on average, approximately eight high-precipitation events per year that can bring more than half of the total annual accumulation. The duration of the events varies between 1 day and about 1 week. On most days in the remaining time of the year, however, daily precipitation sums are about one order of magnitude smaller than that for the high-precipitation events. Synoptic weather patterns causing these events were directly connected to frontal systems of cyclones in only 20% of the 51 investigated cases. The majority of the events occurred in connection with (blocking) anticyclones and correspondingly amplified Rossby waves, which lead to advection of warm, moist air from relatively low latitudes. Possible changes in the seasonality and frequency of these events in a different climate can lead to a bias in ice core properties and might also strongly influence the mass balance of the Antarctic continent and thus global sea level change.
    doi:10.1029/2009JD013410

  112. Estimated impact of black carbon deposition during pre-monsoon season from Nepal Climate Observatory - Pyramid data and snow albedo changes over Himalayan glaciers. Reviewed

    Yasunari TJ, Bonasoni P, Laj P, Fujita K, Vuillermoz E, Marinoni A, Cristofanelli P, Duchi R, Tartari G, Lau KM

    Atmospheric Chemistry and Physics   Vol. 10   page: 6603-6615   2010.7

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    The possible minimal range of reduction in snow surface albedo due to dry deposition of black carbon (BC) in the pre-monsoon period (March–May) was estimated as a lower bound together with the estimation of its accuracy, based on atmospheric observations at the Nepal Climate Observatory – Pyramid (NCO-P) sited at 5079 m a.s.l. in the Himalayan region. A total BC deposition rate was estimated as 2.89 μg m-2 day-1 providing a total deposition of 266 μg m-2 for March–May at the site, based on a calculation with a minimal deposition velocity of 1.0×10-4 m s-1 with atmospheric data of equivalent BC concentration. Main BC size at NCO-P site was determined as 103.1–669.8 nm by correlation analyses between equivalent BC concentration and particulate size distributions in the atmosphere. The BC deposition from the size distribution data was also estimated. It was found that 8.7% of the estimated dry deposition corresponds to the estimated BC deposition from equivalent BC concentration data. If all the BC is deposited uniformly on the top 2-cm pure snow, the corresponding BC concentration is 26.0–68.2 μg kg-1, assuming snow density variations of 195–512 kg m-3 of Yala Glacier close to NCO-P site. Such a concentration of BC in snow could result in 2.0–5.2% albedo reductions. By assuming these albedo reductions continue throughout the year, and then applying simple numerical experiments with a glacier mass balance model, we estimated reductions would lead to runoff increases of 70–204 mm of water. This runoff is the equivalent of 11.6–33.9% of the annual discharge of a typical Tibetan glacier. Our estimates of BC concentration in snow surface for pre-monsoon season is comparable to those at similar altitudes in the Himalayan region, where glaciers and perpetual snow regions begin, in the vicinity of NCO-P. Our estimates from only BC are likely to represent a lower bound for snow albedo reductions, because we used

  113. Formation conditions of supraglacial lakes on debris-covered glaciers in the Himalayas. Reviewed

    Sakai A, Fujita K

    Journal of Glaciology   Vol. 56 ( 195 ) page: 177-181   2010.4

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  114. Multi-decadal ice-velocity and elevation changes of a monsoonal maritime glacier: Hailuogou glacier, China. Reviewed

    Zhang Y, Fujita K, Liu SY, Liu Q, Wang X

    Journal of Glaciology   Vol. 56 ( 195 ) page: 65-74   2010.4

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    Digital elevation models (DEMs) of the ablation area of Hailuogou glacier, China, produced from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data obtained in 2009, differential GPS (DGPS) data surveyed in 2008 and aerial photographs acquired in 1966 and 1989 are differenced to estimate long- and short-term glacier surface elevation change (dh/dt). The mean dh/dt of the ablation area over 43 years (1966-2009) is -1.1 ± 0.4 m a-1. Since 1989 the thinning has accelerated significantly. Ice velocities measured by DGPS at 28 fixed stakes implanted in the ablation area increase with distance from the glacier terminus, ranging from 41.0 m a-1 approaching the glacier terminus to a maximum of 205.0 m a-1 at the base of an icefall. Our results reveal that the overall average ice velocity in the ablation area has undergone significant temporal variability over the past several decades. Changes in glacier surface elevation in the ablation area result from the combined effects of climate change and glacier dynamics, which are driven by different factors for different regions and periods.

  115. A shallow ice core re-drilled on the Dunde Ice Cap, western China: recent changes in the Asian high mountains. Reviewed

    Takeuchi N, Miyake T, Nakazawa F, Narita H, Fujita K, Sakai A, Nakawo M, Fujii Y, Duan KQ, Yao TD

    Environmental Research Letters   Vol. 4   page: 045207   2009.12

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    A 51 m deep ice core was re-drilled on the Dunde Ice Cap of western China in 2002, 15 years after the previous ice core drilling in 1987. Dating by seasonal variations in δ18O and particle concentration showed that this 51 m deep ice core covered approximately the last 150 years. The stratigraphy and density showed that more than 90% of the ice core was refrozen ice layers, which comprised less than 5% of the annual accumulation in the older core. This indicates that the ice cap had experienced a more intense melting since 1987, possibly due to climate warming in this region. Mean net accumulation since the last drilling (2002–1987) was 176 mm a-1, which was considerably smaller than that obtained from the 1987 core (390 mm a-1, 1987–1963), indicating a significant decrease of net accumulation on the ice cap in the more recent period. The δ18O record showed an increasing trend in the late 19th century and the highest in the 1950s, which is consistent with the previous core findings. However, there has been no significant increase in δ18O during the last two decades, in contrast to the warming trends suggested by the melt features and other climate records. This discrepancy may be due to the modification of δ18O records by melt water runoff, percolation, and refreezing on the ice cap. Results strongly suggest recent significant mass loss of glaciers in the Asian high mountains and serious shortage of water supply for local people in this arid region in the near future.

    http://www.iop.org/EJ/abstract/1748-9326/4/4/045207

  116. A snow algal community on the surface and in an ice core of Rikha-Samba Glacier in Western Nepali Himalayas. Reviewed

    Takeuchi N, Fujita K, Nakazawa F, Matoba S, Nakawo M, Rana B

    Bulletin of Glaciological Research   Vol. 27   page: 25-35   2009.12

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  117. Recent changes in Imja Glacial Lake and its damming moraine in the Nepal Himalaya revealed by in-situ surveys and multi-temporal ASTER imagery. Reviewed

    Fujita K, Sakai A, Nuimura T, Yamaguchi S, Sharma RR

    Environmental Research Letters   Vol. 4   page: 045205   2009.11

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  118. Total solar eclipse over Antarctica on 23 November 2003 and its effects on the atmosphere and snow near the ice sheet surface at Dome Fuji. Reviewed

    Kameda T, Fujita K, Sugita O, Hirasawa N, Takahashi S

    Journal of Geophysical Research - Atmospheres   Vol. 114   page: D18115   2009.9

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    The Moon cast a long shadow over Antarctica on 23 November 2003 in a total solar eclipse. The eclipse was observed at Dome Fuji Station, located at the highest point of East Dronning Maud Land, Antarctica, and lasted 1 h 41 min 37 s in a cloudless condition, during which the Sun was completely obscured for 1 min 43 s. This was the first total solar eclipse to be observed in the Antarctic ice sheet. During the eclipse at Dome Fuji, the air temperature at 1.5 m above the snow surface and the subsurface snow temperature decreased by 3.0 K and 1.8 K, respectively. Estimated surface snow temperatures decreased by 4.6 K. Atmospheric pressure and wind direction did not change, but the wind speed possibly decreased by 0.3 m/s with decreasing air temperature; natural variations in wind speed before and after the eclipse made it difficult to identify a true effect of the solar eclipse. Variations of energy components (net shortwave and longwave radiations, sensible and latent heat fluxes, and geothermal heat) during the eclipse were investigated. The total loss of global solar radiation during the eclipse was 0.60 MJ m-2, equaling 1.6% of the total daily global solar radiation. Regional effects of the eclipse due to a reduction of global solar radiation for air temperature and snow temperature ranged from 0.015 to 0.020 K (W m-2)-1. We additionally examined the relation between eclipse obscuration (the fraction of the Sun's surface area occulted by the Moon) and the reduction of global solar radiation from the first to second contacts. The eclipse was also observed from space by the Moderate Resolution Imaging Spectroradiometer (MODIS) sensors onboard NASA's Terra and Aqua satellites. The observational results of this study will contribute to detailed model calculations for clarifying the meteorological effects of eclipses.

    http://www.agu.org/pubs/crossref/2009/2009JD011886.shtml

  119. Simplification of heat balance calculation and its application to the glacier runoff from the July 1st Glacier in northwest China since the 1930s. Reviewed

    Sakai A, Fujita K, Nakawo M, Yao T

    Hydrological Processes   Vol. 23 ( 4 ) page: 585-596   2009.2

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    Since ancient times meltwater from glaciers in mountain zones has been an important water resource in the arid region of northwest China. Meteorological elements for heat balance calculations at the glacier surface were simplified with the aim of simulating discharge fluctuations from the July 1st Glacier over a span of decades. By estimating relative humidity and downward solar radiation from precipitation, heat balance calculations at the glacier can be made using only daily temperature and precipitation, which are easily obtainable. Calculations of daily discharge using the above method during the melting season in 2002 produced a better simulation than those using the conventional positive degree-day (PDD) factor method. (The ablation of glacier during any particular period is assumed to be proportional to the sum of daily mean temperatures above the melting point during that period.)
    We calculated the glacier runoff and mass balance at the July 1st Glacier since 1935 from monthly meteorological data taken near the glacier using the above method. We used three patterns of daily temperature and precipitation to estimate daily meteorological data from monthly or annual data. Calculated mass balance using the patterns of air temperature and precipitation in years when the pressure distributions were similar to its long-term average corresponded well with observed data. Our simulation of the glacier runoff since 1935 also showed good results.

    http://www3.interscience.wiley.com/journal/121574898/abstract

  120. Effect of precipitation seasonality on climatic sensitivity of glacier mass balance. Reviewed

    Fujita K

    Earth and Planetary Science Letters   Vol. 276 ( 1-2 ) page: 14-19   2008.11

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    Numerical calculations are described, aimed at evaluating the influence of precipitation seasonality and seasonality concentration on climatic sensitivity of glacier mass balance. Equilibrium line altitudes (ELAs) are modeled using idealized meteorological variables, and then a warming test (+1 °C) is performed, which revealed that the effects of latitude and the annual precipitation amount are less than those of precipitation seasonality and its concentration. Calculation shows higher sensitivities for the glaciers located in a summer precipitation climate than for those located within a winter-precipitation climate. Difference due to seasonality is enhanced with the seasonality concentration. The present study suggests that the earlier parameterization of glacier mass balance with annual precipitation amount is insufficient to describe the response of glaciers to climate change. Distribution of precipitation seasonality and its concentration suggest that many parts of the world have a summer-precipitation climate but their seasonality concentration is not significant worldwide. On the other hand, an extensive region of Asia and part of the Andes are located in the highly concentrated summer-precipitation climate. This suggests the high sensitivity of glacier mass balance in these regions to climate change.

    http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V61-4TPND5C-1&_user=119029&_coverDate=11/30/2008&_rdoc=3&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235801%232008%23997239998%23701811%23FLA%23display%23Volume)&_cdi=5801&_sort=d&_docanchor=&_ct=25&_acct=C000009318&_version=1&_urlVersion=0&_userid=119029&md5=5e83486055fa5c9d81a457ac60ee1fca

  121. ヒマラヤにおける氷河変動 Invited

    藤田耕史

    豊田自動織機技報   Vol. 56   page: 78-84   2008.9

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  122. Rapid decrease of mass balance observed in the Xiao (Lesser) Dongkemadi Glacier, in the central Tibetan Plateau. Reviewed

    Pu J, Yao T, Yang M, Tian L, Wang N, Ageta Y, Fujita K

    Hydrological Processes   Vol. 22 ( 16 ) page: 2953-2958   2008.7

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    The mass balance of the Xiao (Lesser) Dongkemadi Glacier located in the Tanggula Mountains, of the central Qinghai-Tibetan Plateau has been monitored since 1989. The results show that the mass balance of the glacier has recently shown a deficit trend, and that the glacial terminus was also retreating. Positive mass balance of the glacier was dominant during the period 1989-1993, and the accumulated mass balance reached 970 mm. However, negative mass balance of the glacier has occurred since 1994, except for the large positive mass balance year 1997. The mass balance was -701 mm in 1998, an extremely negative glacier mass balance year. The equilibrium line altitude showed a significant increasing trend. The mass balance of the glacier has changed from a significantly positive mass balance to a strongly negative mass balance since 1994. Meteorological data suggest that the rapid decrease in the mass balance is related to summer season warming.

    http://www3.interscience.wiley.com/journal/116327612/abstract

  123. Influence of precipitation seasonality on glacier mass balance and its sensitivity to climate change. Reviewed

    Fujita K

    Annals of Glaciology   Vol. 48   page: 88-92   2008.6

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    Numerical calculations are described, aimed at evaluating the influence of precipitation seasonality (summer and winter) on glacier mass balance. First, equilibrium-line altitudes (ELAs) are modeled using idealized meteorological variables. Modeled climatic conditions (summer mean temperature and annual precipitation) at the ELA of glaciers located within a winter accumulation pattern confirm the observational results of earlier studies. However, the ELA of glaciers located within a summer accumulation climate pattern locates in a colder environment than that of glaciers located within a winter accumulation climate pattern. This difference is mainly due to the annual snow accumulation and the surface albedo. A warming test (+1K) reveals higher sensitivities for the glaciers located within a summer accumulation pattern than for the glaciers located within a winter accumulation pattern. In a humid environment, a significant decrease in snow accumulation on the glaciers located within a summer accumulation pattern directly causes higher sensitivities. In an arid environment, on the other hand, the decreased summer snow induces accelerated melting by lowering the surface albedo and thus increasing absorption of solar radiation on the glaciers located within a summer accumulation pattern. Both influences are due to significant differences in summer precipitation. This study shows the importance of precipitation seasonality on the climatic sensitivity of glacier mass balance, which in previous studies has been linked only with annual precipitation.

    http://www.ingentaconnect.com/content/igsoc/agl/2008/00000048/00000001/art00013

  124. ドームふじにおける放射観測. Reviewed

    平沢尚彦, 藤田耕史

    南極資料   Vol. 52 ( 特集号 ) page: 170-181   2008.6

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    第44次南極地域観測隊により,2003年2月1日から2004年1月20日の地上放射観測(短波上向き・下向き,長波上向き・下向き)の結果を報告する.放射計ドームの着霜を回避する目的でファン付き放射計を用いた上向き,下向きの長波放射,及び下向きの短波放射は1997年の観測値と比較的近い値を示し,両年の観測の妥当性を示唆した.しかし,ファンのない放射計を用いた上向き短波放射は,極夜前後の1-2カ月において下向き短波放射を上回るなど,異常値を示している.着霜がこの原因の候補の一つであるが,確かめられない.データの修正については今後の課題とする.また,極夜期の上向き・下向き長波放射について,典型的な地表面放射冷却時期と放射冷却が抑制される時期について,事例を示した.

  125. シーロメータにより観察されたドームふじの雲・降雪の鉛直分布と季節変化. Reviewed

    平沢尚彦, 藤田耕史

    南極資料   Vol. 52 ( 特集号 ) page: 159-169   2008.6

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    第44次南極地域観測隊のドームふじ基地におけるシーロメータ観測の結果から,雲及び降雪粒子の鉛直プロファイルの季節変化の概要をまとめ,特徴的な鉛直プロファイルを示した.夏季の2003年2月,12月,及び2004年1月には高度1000m以下に明瞭な雲底が検出される場合が比較的多かった.4月から10月には高度3000mから5000m(標高約7000-9000m)層で夏季より高頻度に雲が観測された.極夜期には高度1500m以下の層でストリーク状の降雪が観測され,これまでの研究と比較し議論した.このストリーク状の降雪は地上に近いほど後方散乱係数が大きくなる特徴を示した.

  126. 水の酸素・水素安定同位体を用いた地球水循環研究と今後の展望. Reviewed

    檜山哲哉, 阿部理, 栗田直幸, 藤田耕史, 池田健一, 橋本重将, 辻村真貴, 山中勤

    水文・水資源学会誌   Vol. 21 ( 2 ) page: 158-176   2008.3

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    水の酸素・水素安定同位体(以下,水の安定同位体)を用いた水循環過程に関する重要な研究および最近の研究のレビューを行った.海水の同位体組成(同位体比)に関する知見,同位体大循環モデルを用いた全球スケールの水循環研究,降水形態による同位体比の差異や局域スケールの降水過程に関する研究,流域スケールでの流出過程,植生に関わる蒸発散過程(蒸発と蒸散の分離)の研究をレビューした.加えて,幅広い時間スケールでの気候変動や水循環変動に関する研究として,氷床コアや雪氷コアを利用した古気候・古環境復元とそれらに水の安定同位体を利用した研究についてもレビューした.最後に,水の安定同位体を利用した水循環研究の今後の展望をまとめた.

    http://www.jstage.jst.go.jp/article/jjshwr/21/2/21_158/_article/-char/ja/

  127. Performance of ASTER and SRTM DEMs, and their potential for assessing glacier lakes in the Lunana region, Bhutan Himalayas. Reviewed

    Fujita K, Suzuki R, Nuimura T, Sakai A

    Journal of Glaciology   Vol. 54 ( 185 ) page: 220-228   2008.3

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  128. 七一氷河を巡る

    藤田耕史

    アジア遊学   Vol. 99   page: 24-27   2007

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  129. Surfacewater-groundwater interaction in the Heihe River basin, Northwestern China. Reviewed

    Akiyama T, Sakai A, Yamazaki Y, Wang G, Fujita K, Nakawo M, Kubota J, Konagaya Y

    Bulletin of Glaciological Research   Vol. 24   page: 87-94   2007

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    River discharge and groundwater level data were collected in the Heihe River basin, which is the second largest inland river in Northwestern China. The surfacewater-groundwater interaction, particularly in the lower desert reaches, was analyzed with the help of isotope data of water collected from the river. In the non-irrigation period, river water, which originated from the groundwater in the middle oasis reaches, was present throughout the period in the lower desert reaches. During this period, the river water recharged the groundwater not only in the riparian forest region located near the river but also in the desert-riparian fringe region located farther away from the river. In the irrigation period, the river was usually dried up in the lower desert reaches. The river water in the lower reaches appeared just after short-term releases from the middle reaches; the groundwater level in the riparian forest region rose rapidly, but it declined again just after the short-term releases finished. Since the mixing ratio of the short-term released discharge to the groundwater in the desert-riparian fringe region was smaller than that in the riparian forest region, the short-term released discharge did not contribute to the groundwater recharge in the desert-riparian fringe region.

  130. * Spatial distribution of thermal properties on debris-covered glaciers in the Himalayas derived from ASTER data. Reviewed

    Suzuki R, Fujita K, Ageta Y

    Bulletin of Glaciological Research   Vol. 24   page: 13-22   2007

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  131. Characteristics and climatic sensitivities of runoff from a cold-type glacier on the Tibetan Plateau. Reviewed

    Fujita K, Ohta T, Ageta Y

    Hydrological Processes   Vol. 21 ( 21 ) page: 2882-2891   2007

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    Model calculations are made in order to understand the characteristics and response to climate change of runoff from a cold glacier on the Tibetan Plateau. Some 20% of meltwater is preserved at the snow-ice boundary due to refreezing, since the glaciers in mid to northern Tibet are sufficiently cooled during the previous winter.
    Sensitivity to alterations in meteorological parameters has revealed that a change in air temperature would cause not only an increase in melting by sensible heat, but also a drastic increase in melting due to lowering of the albedo, since some of the snowfall changes to rainfall. In addition, it was suggested that a decrease in precipitation would cause a lowering of the surface albedo, with a resulting increase in the contribution of glacier runoff to the total runoff of river water. This study shows the first quantitative evaluation of the above effects, though they have been suggested qualitatively. The seasonal sensitivity of glacier runoff was examined by changing the dates given for a meteorological perturbation for a period of only 5 days. It was revealed that changes in both air temperature and precipitation during the melting season strongly affected glacier runoff by changing the surface albedo, though these perturbations only slightly altered the annual averages.

    http://www3.interscience.wiley.com/journal/113508995/abstract

  132. Effect of dust event timing on glacier runoff: sensitivity analysis for a Tibetan glacier. Reviewed

    Fujita K

    Hydrological Processes   Vol. 21 ( 21 ) page: 2892-2896   2007

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    The impact of the timing of dust deposition on glacier runoff was evaluated using a glacier mass-balance model with a newly improved scheme to track a dusted layer in a snow layer of a glacier. The lowering of surface albedo due to the dusted layer appearing leads to a drastic increase of glacier runoff even under the same meteorological conditions. Calculations of seasonal sensitivity, the relationship between dusted date and resulting runoff, have shown that dust deposition during a melting season might cause a drastic mass outflow from a glacier through changing the surface albedo during the melting season.

    http://www3.interscience.wiley.com/journal/113509005/abstract

  133. Topographical survey of end-moraine and dead ice area at the Imja Glacial Lake in 2001 and 2002. Reviewed

    Sakai A, Saito M, Nishimura K, Yamada T, Iizuka Y, Harada K, Kobayashi S, Fujita K, Gurung CB

    Bulletin of Glaciological Research   Vol. 24   page: 29-36   2007

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    A survey was carried out at the end moraine and the dead ice area of the Imja Glacial Lake in October 2001 and in April 2002 using a digital theodolite with a laser distance meter and differential Global Positioning System (d-GPS). The survey points covered the whole dead ice area and end moraine of the Imja Glacier, and map contours were produced at 5 m intervals. This topographical map will be a significant means to analyze the time variation of the dead ice area and end moraine in future re-mapping. Changes in the lake level and the spillway on the dead ice area since 1994 were also analyzed in comparison with the measurements in 1994 by Watanabe et al. (1995).

  134. Meteorological observations during 2002-2004 in Lunana region, Bhutan Himalayas. Reviewed

    Suzuki R, Fujita K, Ageta Y, Naito N, Matsuda Y, Karma

    Bulletin of Glaciological Research   Vol. 24   page: 71-78   2007

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    Meteorological observations were carried out in the Lunana region, Bhutan Himalayas, from September 2002 to October 2004. An automatic weather station (Lugge AWS) was installed at 4524 m a.s.l. on the end moraine of Lugge Glacier. In addition, air temperatures, ground temperatures and relative humidity were observed simultaneously around the AWS from late September to early October in 2003 and 2004 to investigate spatial variation of these components. Characteristics of seasonal and diurnal variations of meteorological elements are shown using the data observed by the AWS. Relatively large spatial variability of surface temperature is shown by the data observed at different sites compared to that of air temperature and relative humidity.

  135. Worldwide shrinkage of glaciers. Invited

    Fujita K

    Japanese Alpine News   Vol. 8   page: 90-96   2007

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  136. Glaciological data collected by the 44th Japanese Antarctic Research Expedition during 2003-2004.

    Kameda T, Fujita K, Sugita O, Hashida G

    JARE Data Reports, National Institute of Polar Research   Vol. 298 (Glaciology 32)   page: 92pp   2007

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  137. Estimation of atmospheric transmissivity of solar radiation from precipitation in the Himalayas and Tibetan Plateau. Reviewed

    Matsuda Y, Fujita K, Ageta Y, Sakai A

    Annals of Glaciology   Vol. 34   page: 344-350   2006

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    Though solar radiation is important for glacier mass-balance simulation, solar radiation data are not always available. As a result of analyzing meteorological data measured in the Himalaya and the Tibetan Plateau, a favorable correlation between precipitation and atmospheric transmissivity of solar radiation is found in terms of monthly values. Monthly mean solar radiation is derived from the relationship between atmospheric transmissivity of solar radiation and precipitation with input of monthly precipitation, latitude, skyline and time. The differences between estimated and observed monthly mean solar radiation are <40 W m-2 in most cases. However, the differences at some sites are significantly large. The error in the estimated solar radiation during the monsoon season can be large when the monthly mean precipitation rate is about 5 mm d-1. Though the error in the estimated solar radiation during the non-monsoon season is generally small due to low precipitation in the Himalaya and the Tibetan Plateau during this season, it can exceed 100 W m-2.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00052

  138. A snow algal community on Akkem Glacier in the Russian Altai Mountains. Reviewed

    Takeuchi N, Uetake J, Fujita K, Aizen VB, Nikitin S

    Annals of Glaciology   Vol. 43   page: 378-384   2006

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    Snow algae are cold-tolerant algae growing on snow and ice and have been reported on glaciers in many parts of the world. Blooms of snow algae can reduce the surface albedo of snow and ice and significantly affect their melting. In addition, snow algae found in ice cores can be potential indicators of the paleo-environment, making them of great interest both to the biology and the geophysics of glaciers. A snow algal community was investigated in 2002 and 2003 on Akkem glacier in the Russian Altai mountains, where no information on its biological community has previously been available. Five species of snow algae including green algae and cyanobacteria were observed on the glacier. Red snow due to a bloom of algae (Chloromonas sp.) was visually apparent in the snow area during our study periods. The total algal cell-volume biomass on the glacier ranged from 97 to 1156 μL m-2, which is equivalent to that reported previously on glaciers in the Himalaya and Alaska. The community structure showed that Mesotaenium berggrenii and/or Ancylonema nordenskioeldii, which are common species on glaciers in the Northern Hemisphere, were dominant in the ice area, while Chloromonas sp. was dominant in the snow area. Such community structures are similar to those on Alaskan and Arctic glaciers but differ from those on Himalayan and Tibetan glaciers, even though the Altai mountains are geographically closer to the Himalaya and Tibet than to Alaska. The difference in algal communities between the Altaic and other glaciers is discussed together with physical and chemical conditions affecting the algae.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00056

  139. Preliminary observations of sub-surface and shallow ice core at July 1st Glacier, China in 2002-2004. Reviewed

    Uetake J, Sakai A, Matsuda Y, Fujita K, Narita H, Matoba S, Duan K, Nakawo M, Yao T

    Bulletin of Glaciological Research   Vol. 23   page: 85-93   2006

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    The albedo reduction on glacier surfaces in past summers due to microbiological activities and mineral particles should be considered to reconstruct precise fluctuation of glacier mass balance. However, there is little knowledge on preservation of the microorganisms and the mineral particles in glacier ice. In particular, influence of superimposed ice formation on these preservations is unknown. As the first step to understand the albedo reduction process and to reconstruct surface albedo changes on glaciers in northwestern China, where superimposed ice formation has an impact on glacier mass balance, we report the glacier surface level changes, seasonal and annual changes of stratigraphy and analyzed results of short ice cores at upper parts of the July 1st Glacier from 2002 to 2004. Surface melting on the glacier was accelerated by dark-colored materials composed of cryoconite and mineral particles. The glacier surface level was lowered year by year and ELA (Equilibrium Line Altitude) was much higher than that in the 1970s and 1980s. An ice core of 1.82m length included five cyanobacterial layers. As cyanobacteria grow during summer, these layers may be useful as markers for summer layers and allow to infer surface albedo changes in the past. Average annual snow mass balance estimated from the cyanobacterial peaks in the core is 313 mm, which corresponds to the annual precipitation observed near the terminus of the July 1st Glacier. These results would open up the possibilities that we could reconstruct past mass balance and albedo effects.

  140. Hydrological observations at July 1st Glacier in northwest China from 2002 to 2004. Reviewed

    Sakai A, Matsuda Y, Fujita K, Duan K, Pu J, Yamaguchi S, Nakawo M, Yao T

    Bulletin of Glaciological Research   Vol. 23   page: 33-39   2006

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    Hydrological observation was carried out at the July 1st Glacier in the Qilian mountains, northwest China, during the glacier melting season from 2002 to 2004. Water discharge was measured using two methods, current meter and salt water. The results of these methods showed a good correspondence. A logger for water level was settled at the glacier terminus in 2002 and at the foot of the end-moraine in 2003 and 2004. Then, variations in discharge were evaluated based on the relationship between discharge and water level. Total observed runoff depth from the basin was 834 mm in 2002. The average value of water budget components, such as precipitation, glacier mass balance, evaporation at the glacier and glacier-free area, were evaluated in 2002 from observation and meteorological data. The results indicated that the discharge from the glacier area was 6 times larger than that of the glacier-free area mainly due to glacier shrinkage.

  141. Meteorological observation at July 1st Glacier in northwest China from 2002 to 2005. Reviewed

    Sakai A, Matsuda Y, Fujita K, Matoba S, Uetake J, Satow K, Duan K, Pu J, Nakawo M, Yao T

    Bulletin of Glaciological Research   Vol. 23   page: 23-31   2006

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    Meteorological observations were carried out at July 1st Glacier (J1G) in Northwest China. An automatic weather station was established at the glacier terminus 4295 m a.s.l. altitude from June 2002 to August 2005. Manual meteorological observations and dust particle counting have also been conducted at the Base Camp during the summers of 2002, 2003 and 2004. The catch ratio of the precipitation was calibrated, separating it into rain and snow depending on the air temperature, which relation has been observed at Base Camp. The calibrated annual precipitation in 2002 was about 340 mm, which was more than 20% above the observed value. Inter-annual variations in the meteorological data revealed that there were remarkable wet calm and cloudy periods during the summer 2002.

  142. * Thirty-year history of glacier melting in the Nepal Himalayas. Reviewed

    Fujita K, Thompson LG, Ageta Y, Yasunari T, Kajikawa Y, Sakai A, Takeuchi N

    Journal of Geophysical Research - Atmospheres   Vol. 111 ( D3 ) page: D03109   2006

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    Two net balance records of neighboring glaciers under different conditions are analyzed to extract temporal variations in glacier melting in the Himalayas. Significant melt was observed every year at one site (wet site), whereas no melt occurred at the second site because of its high elevation (dry site). Accumulation at the wet site of a glacier is estimated from the dry site neighboring another glacier through a measured precipitation record for a short time period. The difference between the estimated accumulation and the net balances at the wet site is obtained as the “melt index," which represents the glacier melting conditions. The melt index with an interannual timescale is significant as a climatic proxy at high elevation since no relationship between stable isotopes and temperature is established and few long-term temperature records are available at high elevations in the Himalayas. The melt index showed a decadal fluctuation with a major amplitude never reported in previous studies with respect to temperature and ice cores analyses in the Himalayas. Ice cores from a site where significant melt occurs every year have not been considered available in reconstructing past climates since climatic signals in ice were disturbed by meltwater infiltration. However, we suggest a new approach to glean temperature information by a combination of wet and dry cores, not obtainable from a good-quality ice core alone.

    http://www.agu.org/pubs/crossref/2006/2005JD005894.shtml

  143. Stable isotopes in daily precipitation at Dome Fuji, East Antarctica. Reviewed

    Fujita K, Abe O

    Geophysical Research Letters   Vol. 33 ( 18 ) page: L18503   2006

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  144. Topographical survey of July 1st Glacier in Qilian Mountains, China. Reviewed

    Fujita K, Sakai A, Matsuda Y, Narama C, Naito N, Yamaguchi S, Hiyama K, Pu J, Yao T, Nakawo M

    Bulletin of Glaciological Research   Vol. 23   page: 63-67   2006

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    In order to evaluate recent glacier shrinkage in the arid region of China, surveys using a global positioning system (GPS) and digital theodolite with laser distance meter were carried out on the July 1st glacier in the Qilian Mountains from 2002 to 2004. Benchmarks and stakes on around the glacier were installed in 2002. A new 2002 map was carefully superposed on a map created in 1975 using a salient moraine ridge and boundary of the accumulation area, since no ground control point was available in the old 1975 map. A retreat of the glacier termini has been detectable since 1956 with a notable retreat occurring between 2002 and 2003. Surface flow velocities were obtained by repeated measurements of a stake network. The new map and benchmarks provide basic information for future survey studies.

  145. Snow algae in a Himalayan ice core: new environmental markers for ice core analyses and their correlation with summer mass balance. Reviewed

    Yoshimura Y, Kohshima S, Takeuchi N, Seko K, Fujita K

    Annals of Glaciology   Vol. 43   page: 148-153   2006

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    Snow algae in a shallow ice core (6.98 m long) from Yala glacier in the Langtang region of Nepal were examined for potential use as environmental markers in ice-core analysis. The ice core, taken at 5350 m a.s.l. in 1994, was estimated to contain 11 annual layers from 1984 to 1994 from the profile of algal biomass. Algal biomass in each annual layer was noted to be correlated with air temperature, and the following two environmental indices which were calculated from air temperature and precipitation at Kyangjing (3920 m a.s.l.), the village nearest to Yala glacier: estimated mean snow-cover thickness (MST) and estimated summer mass balance (SMB). Both parameters reflect snow-cover thickness on algal layers, which would be a major determinant of the light available for algal growth on the glacier. Snow algal biomass in the ice core appears to be a good environmental marker for indicating air temperature and accumulation during summer, which is important for understanding the mass balance of summer-accumulation-type glaciers in this region.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00022

  146. 氷河変動と海水準に関する最近の研究. Reviewed

    藤田耕史

    雪氷   Vol. 68 ( 6 ) page: 625-637   2006

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    地球温暖化のもっとも象徴的な話題ともいえる,氷河縮小と海水準変動について,関連する研究をインベントリー,観測,モデルなどのアプローチ別に紹介し,それぞれの研究の位置づけと問題点,今後の課題を提示する.

  147. Use of ice cores from glaciers with melting for reconstructing mean summer temperature variations. Reviewed

    Nakazawa F, Fujita K

    Annals of Glaciology   Vol. 43   page: 167-171   2006

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    This study examines a new method for reconstructing mean summer temperature variations by using an ice core from a wet-snow zone on a summer-accumulation-type glacier. In July 2001, a 25.1 m deep ice core was recovered from the accumulation area of Sofiyskiy glacier (49°47′ N, 87°43′ E; 3435 m a.s.l.), located in the southern Chuyskiy range of the Russian Altai mountains, and a 4.5 m deep pit was excavated about 50 m northwest of the drill site. The observation site has a positive balance even during summer when melting occurs. The summer balance for each year from 1990 to 2000 was estimated from Pinaceae and Artemisia pollen peaks in these samples. Pinaceae pollen marks spring, whereas Artemisia pollen marks autumn. Moreover, meltwater intrusion did not reach the previous year's accumulation. Thus, the ice between these pollen peaks in the same year was used to estimate a summer balance. The reconstructed summer balance variations were negatively correlated with mean summer temperature variations (r = -0.72, P < 0.05). This study shows that, for summer-accumulation-type glaciers such as Sofiyskiy glacier, the most important climate factor controlling the glacier's surface mass balance is mean summer temperature. Therefore, the summer layer thickness in an ice core can be used as a proxy for reconstructing mean summer temperature variations.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00025

  148. Aeolian dust experiment on climate impact: An overview of Japan-China joint project ADEC. Reviewed

    Mikami M, Shi GY, Uno I, Yabuki S, Iwasaka Y, Yasui M, Aoki T, Tanaka TY, Kurosaki Y, Masuda K, Uchiyama A, Matsuki A, Sakai T, Takemi T, Nakawo M, Seino N, Ishizuka M, Satake S, Fujita K, Hara Y, Kai K, Kanayama S, Hayashi M, Du M, Kanai Y, Yamada Y, Zhang XY, Shen Z, Zhou H, Abe O, Nagai T, Tsutsumi Y, Chiba M, Suzuki J

    Global and Planetary Change   Vol. 52 ( 1-4 ) page: 142-172   2006

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    The Aeolian Dust Experiment on Climate Impact (ADEC) was initiated in April 2000 as a joint five-year Japan–China project. The goal was to understand the impact of aeolian dust on climate via radiative forcing (RF). Field experiments and numerical simulations were conducted from the source regions in northwestern China to the downwind region in Japan in order to understand wind erosion processes temporal and spatial distribution of dust during their long-range transportation chemical, physical, and optical properties of dust and the direct effect of radiative forcing due to dust. For this, three intensive observation periods (IOP) were conducted from April 2002 to April 2004.


    http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VF0-4JVTBVS-1&_user=119029&_coverDate=07/31/2006&_alid=844915395&_rdoc=1&_fmt=high&_orig=search&_cdi=5996&_sort=d&_docanchor=&view=c&_ct=1&_acct=C000009318&_version=1&_urlVersion=0&_userid=119029&md5=9b8a345dbee7ce91ab9e5786e7c8139e

  149. Five decades of shrinkage of the July 1st Glacier, Qilian Mountains, China. Reviewed

    Sakai A, Fujita K, Duan K, Pu J, Nakawo M, Yao T

    Journal of Glaciology   Vol. 52 ( 176 ) page: 11-16   2006

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    A survey of July 1st glacier, Qilian Shan, China, was carried out in 2002. Previously, the glacier's boundary had been recorded in 1956, and further research had been carried out in the mid-1970s and 1980s. Our survey reveals that area shrinkage and surface lowering have accelerated in the past 15 years. Surface elevation changes can result from changes in accumulation, surface melting and emergence velocity. The contributions of these elements to surface lowering are evaluated at the lower part of the glacier from observations of surface velocity, ice thickness and precipitation, and from temperature data near the glacier. Apart from the effect of glacier ice redistribution, our analysis reveals quantitatively that the recent accelerated glacier shrinkage has been caused by increasing temperature. Furthermore, it is established that meltwater discharge from the glacier in the past 17 years has increased due to glacier shrinkage, by about 50% over that from 1975 to 1985.

    http://www.ingentaconnect.com/content/igsoc/jog/2006/00000052/00000176/art00002

  150. Climatic and atmospheric circulation pattern variability from ice-core isotope/geochemistry records (Altai, Tien Shan and Tibet). Reviewed

    Aizen VB, Aizen EM, Joswiak DR, Fujita K, Takeuchi N, Nikitin SA

    Annals of Glaciology   Vol. 43   page: 49-60   2006

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    Several firn/ice cores were recovered from the Siberian Altai (Belukha plateau), central Tien Shan (Inilchek glacier) and the Tibetan Plateau (Zuoqiupu glacier, Bomi) from 1998 to 2003. The comparison analyses of stable-isotope/geochemistry records obtained from these firn/ice cores identified the physical links controlling the climate-related signals at the seasonal-scale variability. The core data related to physical stratigraphy, meteorology and synoptic atmospheric dynamics were the basis for calibration, validation and clustering of the relationships between the firn-/ice-core isotope/geochemistry and snow accumulation, air temperature and precipitation origin. The mean annual accumulation (in water equivalent) was 106 g cm-2 a-1 at Inilchek glacier, 69 g cm-2 a-1 at Belukha and 196 g cm-2 a-1 at Zuoqiupu. The slopes in regression lines between the δ18O ice-core records and air temperature were found to be positive for the Tien Shan and Altai glaciers and negative for southeastern Tibet, where heavy amounts of isotopically depleted precipitation occur during summer monsoons. The technique of coupling synoptic climatology and meteorological data with δ18O and d-excess in firn-core records was developed to determine climate-related signals and to identify the origin of moisture. In Altai, two-thirds of accumulation from 1984 to 2001 was formed from oceanic precipitation, and the rest of the precipitation was recycled over Aral-Caspian sources. In the Tien Shan, 87% of snow accumulation forms by precipitation originating from the Aral-Caspian closed basin, the eastern Mediterranean and Black Seas, and 13% from the North Atlantic.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00009

  151. Concentrations and source variations of n-alkanes in a 21 m-ice core and snow samples at Belukha Glacier, Russian Altai Mountains. Reviewed

    Miyake T, Nakazawa F, Sukugawa H, Takeuchi N, Fujita K, Ohta K, Nakawo M

    Annals of Glaciology   Vol. 43   page: 142-147   2006

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    Ice-core and snow samples collected on Belukha glacier, Russian Altai mountains, were analyzed for n-alkanes by gas chromatography. On the basis of the total concentrations (T-HCs), carbon preference index (CPI) values and the plant wax contributions (WaxCn), it is suggested that mountain glaciers on the Asian continent received higher loading of n-alkanes from natural and anthropogenic sources than the Greenland ice sheet. It appears that the loading and variation of n-alkanes on glaciers in the Altai are approximately the same as those of the mountain in general, because the concentrations, CPI values and WaxCn percentages of n-alkanes in Sofiyskiy glacier, also in the Russian Altai, are at the same levels as or slightly greater than those in ice-core and snow samples from Belukha glacier. It seems that the n-alkanes on Belukha glacier are derived mainly from higher plant wax and petroleum exhaust other than from diesel engines. Vertical profiles of T-HCs and CPI values of n-alkanes show that the non-WaxCn portions and T-HCs have recently increased with a decrease in CPI values on Belukha glacier. A similar trend of n-alkanes was reported for Sofiyskiy glacier, indicating that the influence of human activities has gradually increased around the Altai.

    http://www.ingentaconnect.com/content/igsoc/agl/2006/00000043/00000001/art00021

  152. 名古屋大学地球水循環研究センターにおける水安定同位体組成分析の現状. Reviewed

    地球水循環研究センター水同位体分析システム運営委員会(阿部理, 池田健一, 大田啓一, 栗田直幸, 坂井亜規子, 中尾正義, 中村健治, 檜山哲哉, 藤田耕史, 三野義尚, 三宅隆之, 李在鎔)

    水文・水資源学会誌   Vol. 18 ( 5 ) page: 531-538   2005

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  153. 南極ドームふじ観測拠点での深掘削上の建設-第44次ドームふじ越冬隊による作業-. Reviewed

    亀田貴雄, 大日方一夫, 高橋暁, 谷口健治, 杉田興正, 藤田耕史, 栗崎高士, 中野啓

    南極資料   Vol. 49 ( 2 ) page: 207-243   2005

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    第44次南極地域観測隊ドームふじ越冬隊は2003年1月19日から2004年1月25日までドームふじ観測拠点(南緯77°19′01″,東経39°42′11″; 標高3810 m)に滞在し,雪氷・気象・宙空の観測を実施する一方,新掘削場の建設作業を実施した.この建設作業は43次隊による新掘削場の外装工事を主体した建設作業を引き継ぎ,新掘削場の内装工事を主とした.本稿では深層掘削準備作業として現地にて実施した以下の作業を記述した.ケーシングパイプ引き上げ,掘削孔拡幅,ケーシングパイプ挿入,ウインチ移設(移設用スロープの造成および10 mピット内の整備),床造成,マスト起倒用10 mピットの造成および10 mピット内の整備,ドリル作業室西側の階段造作および旧掘削場の深層ウインチ跡の床張り,机の製作,マストおよび小型門型クレーンの設置,リフター設置,ウインチ稼働テスト,チップ回収機吊り下げ用ウインチの設置,深層ウインチのケーブル巻き換え,深層ドリルの組み立ておよびマスト調整,コア貯蔵用雪洞の拡幅,コア棚の設置および一般設備工事.これらの作業に要した時間は合計で593.5日・人であり,1日平均6時間の作業時間だったので3561時・人となった.また,越冬中に実施した旧掘削場での検層準備および45次ドーム航空隊を主体とした深層掘削作業についても簡潔に記述した.

  154. Determination of amino acids in ice samples. Reviewed

    Nakazawa F, Ohta K, Harada N, Fujita K, Nakawo M

    Bulletin of Glaciological Research   Vol. 22   page: 69-74   2005

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  155. Mass balance of the Qiyi Glacier in the Qilian Mountains: a new observation. Reviewed

    Pu J, Yao T, Duan K, Fujita K, Sakai A, Matsuda Y

    Journal of Glaciology and Geocryology   Vol. 27 ( 2 ) page: 199-204   2005

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  156. A large amount of biogenic surface dust (cryoconite) on a glacier in the Qilian Mountains, China. Reviewed

    Takeuchi N, Matsuda Y, Sakai A, Fujita K

    Bulletin of Glaciological Research   Vol. 22   page: 1-8   2005

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  157. Dating of seasonal snow/firn accumulation layers using pollen analysis. Reviewed

    Nakazawa F, Fujita K, Takeuchi N, Fujiki T, Uetake J, Aizen V, Nakawo M

    Journal of Glaciology   Vol. 51 ( 174 ) page: 483-490   2005

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    Reliable chronologies in ice cores and snow pits from many alpine glaciers in latitudes between 60° N and 60° S are often difficult to establish owing to problems with annual-layer counting. Problems arise from melting, wind erosion and the negligible amount of precipitation in some seasons, all of which tend to obscure the seasonal variations in δ18O and chemical concentrations that are typically used to date ice cores. However, alpine glaciers contain many species of pollen grains that peak at particular times of the year. We used the peaks in Betulaceae, Pinus, Artemisia and a combination of Abies and Picea pollen species to determine the four seasonal layers of a snow pit on Belukha glacier in Russia's Altai Mountains. Comparing the pollen-dated profiles with wind and precipitation records allows us to determine where a seasonal layer is missing. Thus, the pollen-dating method described here may be a useful tool to measure the annual snow deposition on alpine glaciers, even when some seasonal layers are eroded by wind or missing due to negligible precipitation.

    http://www.ingentaconnect.com/content/igsoc/jog/2005/00000051/00000174/art00016

  158. Stable isotope time series and precipitation origin from firn cores and snow samples, Altai glacier, Siberia. Reviewed

    Aizen VB, Aizen EM, Fujita K, Kreutz K, Takeuchi N

    Journal of Glaciology   Vol. 51 ( 175 ) page: 637-654   2005

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    In the summers of 2001 and 2002, glacio-climatological research was performed at 4110-4120 m a.s.l. on the Belukha snow/firn plateau, Siberian Altai. Hundreds of samples from snow pits and a 21 m snow/firn core were collected to establish the annual/seasonal/monthly depth-accumulation scale, based on stable-isotope records, stratigraphic analyses and meteorological and synoptic data. The fluctuations of water stable-isotope records show well-preserved seasonal variations. The δ18O and δD relationships in precipitation, snow pits and the snow/firn core have the same slope to the covariance as that of the global meteoric water line. The origins of precipitation nourishing the Belukha plateau were determined based on clustering analysis of δ18O and d-excess records and examination of synoptic atmospheric patterns. Calibration and validation of the developed clusters occurred at event and monthly timescales with about 15% uncertainty. Two distinct moisture sources were shown: oceanic sources with d-excess <12‰, and the Aral-Caspian closed drainage basin sources with d-excess >12‰. Two-thirds of the annual accumulation was from oceanic precipitation, of which more than half had isotopic ratios corresponding to moisture evaporated over the Atlantic Ocean. Precipitation from the Arctic/Pacific Ocean had the lowest deuterium excess, contributing one-tenth to annual accumulation.

    http://www.ingentaconnect.com/content/igsoc/jog/2005/00000051/00000175/art00013

  159. Application of pollen analysis to dating of ice cores from lower-latitude glaciers. Reviewed

    Nakazawa F, Fujita K, Uetake J, Kohno M, Fujiki T, Arkhipov SM, Kameda T, Suzuki K, Fujii T

    Journal of Geophysical Research - Earth Surface   Vol. 109 ( F4 ) page: F04001   2004

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    Ice cores from temperate regions have long been expected to be useful for understanding local climate trends, but a reliable dating method has proved difficult. Here we show that measurements of pollen using samples with only 10 mL of water can give an accurate measure of the annual ice accumulation. In addition, two major types of pollen allow us to estimate the summer ice accumulation as well as the annual accumulation.

    http://www.agu.org/pubs/crossref/2004/2004JF000125.shtml

  160. Evaporation and percolation effect on melting at debris-covered Lirung Glacier, Nepal Himalayas, 1996. Reviewed

    Sakai A, Fujita K, Kubota J

    Bulletin of Glaciological Research   Vol. 21   page: 9-15   2004

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  161. 中国甘粛省および内蒙古自治区における内陸河川の水質特性. Reviewed

    秋山知宏, 藤田耕史, 中尾正義, 阿部豊, 辻村真貴

    水文・水資源学会誌   Vol. 17 ( 1 ) page: 61-68   2004

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  162. Glaciological observations on the plateau of Belukha Glacier in the Altai Mountains, Russia from 2001 to 2003. Reviewed

    Fujita K, Takeuchi N, Aizen V, Nikitin S

    Bulletin of Glaciological Research   Vol. 21   page: 57-64   2004

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  163. Chemical characteristics in a 22-m ice core at Belukha Glacier, Russia. Reviewed

    Iizuka Y, Fujita K, Matoba M, Fujii Y, Matsuki K, Kohno M, Aizen V

    Polar Meteorology and Glaciology   Vol. 18   page: 114-120   2004

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  164. Glaciological observations on July 1st glacier in Qilian Mountains of west China during summer 2002. Reviewed

    Matsuda Y, Sakai A, Fujita K, Nakawo M, Duan KQ, Pu J, Yao T

    Bulletin of Glaciological Research   Vol. 21   page: 31-36   2004

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  165. チベット高原における寒冷氷河からの流出特性と気候変動に対する応答予測. Reviewed

    藤田耕史, 太田岳史, 上田豊

    水文・水資源学会誌   Vol. 16 ( 2 ) page: 152-161   2003

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  166. Positive degree-day factors for ice ablation on four glaciers in the Nepalese Himalayas and Qinghai-Tibetan Plateau. Reviewed

    Kayastha RB, Ageta Y, Nakawo M, Fujita K, Sakai A, Matsuda Y

    Bulletin of Glaciological Research   Vol. 20   page: 7-14   2003

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  167. Volume change of Imja Glacial Lake in the Nepal Himalayas. Reviewed

    Sakai A, Fujita K, Yamada T

    Disaster Mitigation and Water Management     page: 556-561   2003

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  168. Distribution characteristics and energy balance of ice cliffs on debri-covered glaciers, Nepal Himalaya. Reviewed

    Sakai A, Nakawo M, Fujita K

    Arctic, Antarctic and Alpine Research   Vol. 34 ( 1 ) page: 12-19   2002

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  169. Impact of dust on glacier mass balance of the Tibetan Plateau. Reviewed

    Fujita K

    Journal of Arid Land Studies   Vol. 11 ( 4 ) page: 355-360   2002

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  170. Ice core drilling on the southern slope of Nepal Himalayas. Reviewed

    Fujita K, Nakazawa F, Takeuchi N, Nakawo M, Rana B, Azuma N, Fujii Y

    Memoirs of National Institute of Polar Research Special Issue   Vol. 56   page: 59-66   2002

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  171. The impact of aeolian dust on climate: Sino-Japanese cooperative project ADEC. Reviewed

    Mikami M, Abe O, Du M, Chiba M, Fujita K, Hayashi M, Iwasaka Y, Kai K, Masuda K, Nagai T, Oomoto T, Suzuki J, Uchiyama A, Yabuki S, Yamada Y, Yasui M, Shi G, Zhang X, Shen Z, Wei W, Zhou J

    Journal of Arid Land Studies   Vol. 11 ( 4 ) page: 211-222   2002

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  172. Surface lowering over the ablation area of Lirung Glacier, Nepal Himalayas. Reviewed

    Naito N, Kadota T, Fujita K, Sakai A, Nakawo M

    Bulletin of Glaciological Research   Vol. 19   page: 41-46   2002

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  173. Shrinkage of Glacier AX010 in Shorong region, Nepal Himalayas in the 1990s. Reviewed

    Fujita K, Kadota T, Rana B, Kayastha RB, Ageta Y

    Bulletin of Glaciological Research   Vol. 18   page: 51-54   2001

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  174. Glaciological observations on Rikha Samba Glacier in Hidden Valley, Nepal Himalayas, 1998 and 1999. Reviewed

    Fujita K, Nakazawa F, Rana B

    Bulletin of Glaciological Research   Vol. 18   page: 31-35   2001

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  175. Variation of precipitation d18O in Langtang Valley, Himalayas. Reviewed

    Zhang X, Nakawo M, Fujita K, Yao T, Han J

    Science in China   Vol. D44 ( 9 ) page: 769-778   2001

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  176. Study project on the recent rapid shrinkage of summer-accumulation type glaciers in the Himalayas, 1997-1999. Reviewed

    Ageta Y, Naito N, Nakawo M, Fujita K, Shankar K, Pokhrel AP, Wangda D

    Bulletin of Glaciological Research   Vol. 18   page: 45-49   2001

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  177. アジア高山域における氷河質量収支の特徴と気候変化への応答. Reviewed

    藤田耕史

    雪氷   Vol. 63 ( 2 ) page: 171-179   2001

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  178. Mass balance of Xiao Dongkemadi Glacier on the central Tibetan Plateau from 1989 to 1995. Reviewed

    Fujita K, Ageta Y, Pu J, Yao T

    Annals of Glaciology   Vol. 31   page: 159-163   2000

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    Data on the mass balance of Xiao Dongkemadi glacier in the Tanggula mountains, central Tibetan Plateau, were obtained over 5.5 years from 1989 to1995. These are the first continuous mass-balance data for a continental-type glacier on the Tibetan Plateau, where the glacier accumulates during the summer monsoon (summer-accumulation-type glacier). Mass-balance vs altitude profiles were steeper in the negative than in the positive mass-balance years. This is considered to have resulted from the effect of summer accumulation. The annual mass balance is compared with air temperature, precipitation, and black-body temperature in the area including the glacier, which is calculated from infrared radiation observations by the Japanese Geostationary Meteorological Satellite. It was found that the interannual variation in the glacier mass balance was not closely related to maximum monthly mean air temperature, while it did have a relatively good correlation with maximum monthly mean black-body temperature.

    http://www.ingentaconnect.com/content/igsoc/agl/2000/00000031/00000001/art00026

  179. Seasonal changes in dissolved chemical composition and flux of meltwater draining from Lirung Glacier in the Nepal Himalayas. Reviewed

    Bhatt MP, Masuzawa T, Yamamoto M, Sakai A, Fujita K

    International Association of Hydrological Sciences, (Symposium at Seattle 2000 - Debris-covered glacier)   Vol. 264   page: 277-288   2000

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  180. Himalayan ice core dating with snow algae. Reviewed

    Yoshimura Y, Kohshima S, Takeuchi N, Seko K, Fujita K

    Journal of Glaciology   Vol. 46 ( 153 ) page: 335-340   2000

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    Snow algae in shallow ice cores (7 m long) from Yala Glacier in the Langtang region of Nepal were examined for potential use in ice-core dating. Ice-core samples taken at 5350 m a.s.l. in 1994 contained more than seven species of snow algae. In a vertical profile of the algal biomass, 11 distinct algal layers were observed. Seasonal observation in 1996 at the coring site indicated most algal growth occurred from late spring to late summer. Pit observation in 1991, 1992 and 1994 indicated that algal layer formation takes place annually. δ18O, chemical ions (Na+, Cl-, SO42- and NO3-) and microparticles failed to show any clear seasonal variation, particularly at depths exceeding 2 m, possibly due to heavy meltwater percolation. Snow algae in ice cores would thus appear to be accurate boundary markers of annual layers and should prove useful for ice-core dating in Himalayan-type glaciers.

    http://www.ingentaconnect.com/content/igsoc/jog/2000/00000046/00000153/art00017

  181. Air temperature environment on the debris-covered area of Lirung Glacier, Langtang Valley, Nepal Himalayas. Reviewed

    Fujita K, Sakai A

    International Association of Hydrological Sciences, (Symposium at Seattle 2000 - Debris-covered glacier)   Vol. 264   page: 83-88   2000

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  182. Role of supraglacial ponds in the ablation process of a debris-covered glacier in the Nepal Himalayas. Reviewed

    Sakai A, Takeuchi N, Fujita K, Nakawo M

    International Association of Hydrological Sciences, (Symposium at Seattle 2000 - Debris-covered glacier)   Vol. 264   page: 119-130   2000

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  183. Characteristics of cryoconite holes on a Himalayan glacier, Yala Glacier Central Nepal. Reviewed

    Takeuchi N, Kohshima S, Yoshimura Y, Seko K, Fujita K

    Bulletin of Glaciological Research   Vol. 17   page: 51-59   2000

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  184. New eyes in the sky measure glaciers and ice sheets. Reviewed

    Kieffer H, Kargel JS, Barry R, Bindschadler R, Bishop M, Mckinnon D, Ohmura A, Raup B, Antoninetti M, Bamber J, Braun M, Brown I, Cohen D, Copland L, DueHagen J, Engeset RV, Fitzharris B, Fujita K, Haeberli W, Hagen JO, Hall D, Hoelzle M, Johansson M, Kääb A, Koenig M, Konobalov V, Maisch M, Paul F, Rau F, Reeh N, Rignot E, Rivera A, Wildt MR, Scambos T, Schaper J, Scharfen G, Shroder J, Solomina O, Thompson D, van der Veen K, Wohlleben T, Young N

    Eos, Transactions American Geophysical Union   Vol. 81 ( 24 ) page: 265, 270-271   2000

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  185. Effect of summer accumulation on glacier mass balance on the Tibetan Plateau revealed by mass-balance model. Reviewed

    Fujita K, Ageta Y

    Journal of Glaciology   Vol. 46 ( 153 ) page: 244-252   2000

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    The characteristics and sensitivities of a cold-based glacier on the Tibetan Plateau, where the summer monsoon provides most of the mass input to glaciers, are discussed using an energy-balance model incorporating the process of water refreezing. The model accurately represents the observational results related to the mass balance of Xiao Dongkemadi glacier on the central plateau during 1992/93. Our data revealed that the mass balance of cold glaciers cannot simply be described by the surface mass/heat balances, because about 20% of infiltrated water is refrozen and thus does not run off from the glacier. Model calculations demonstrate that glaciers in an arid environment can maintain their mass since the monsoon provides precipitation during the melting season. Snowfall in summer keeps surface albedo high and largely restrains ablation. Nevertheless, the calculations also make clear that glaciers on the plateau are more vulnerable than those of other regions because of summer accumulation. In the monsoon climate, warming would cause not only a decrease in accumulation, but also a drastic increase in ablation in combination with surface-albedo lowering. Therefore, although glaciers on and around the plateau can be sustained by summer accumulation, they are more vulnerable to warming than winter-accumulation-type glaciers.

    http://www.ingentaconnect.com/content/igsoc/jog/2000/00000046/00000153/art00009

  186. チベット高原の寒冷氷河における上積氷の研究. Reviewed

    藤田耕史

    雪氷   Vol. 60 ( 5 ) page: 379-385   1998

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  187. Melt rate of ice cliffs on the Lirung Glacier, Nepal Himalayas, 1996. Reviewed

    Sakai A, Nakawo M, Fujita

    Bulletin of Glacier Research   Vol. 16   page: 57-66   1998

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  188. Snow algae community on a Himalayan glacier, Glacier AX010 East Nepal : Relationship with glacier summer mass balance. Reviewed

    Takeuchi N, Kohshima S, Fujita K

    Bulletin of Glacier Research   Vol. 16   page: 43-50   1998

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  189. Surface flow of the ablation area of the Lirung Glacier in Langtang Valley, Nepal Himalayas. Reviewed

    aito N, Nakawo M, Aoki T, Asahi K, Fujita K, Sakai A, Kadota T, Shiraiwa T, Seko K

    Bulletin of Glacier Research   Vol. 16   page: 67-73   1998

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  190. Glaciological observations of Yala Glacier in Langtang Valley, Nepal Himalayas, 1994 and 1996. Reviewed

    Fujita K, Takeuchi N, Seko K

    Bulletin of Glacier Research   Vol. 16   page: 75-81   1998

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  191. Water discharge from the Lirung Glacier in Langtang Valley, Nepal Himalayas. 1996. Reviewed

    Sakai A, Fujita K, Aoki T, Asahi K, Nakawo M

    Bulletin of Glacier Research   Vol. 15   page: 79-83   1997.7

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  192. Meteorological observation in Langtang Valley, 1996. Reviewed

    Fujita K, Sakai A, Chhetri TB

    Bulletin of Glacier Research   Vol. 15   page: 71-78   1997.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  193. Basic studies for assessing the impacts of the global warming on the Himalayan cryosphere, 1994-1996. Reviewed

    Nakawo M, Fujita K, Ageta Y, Shankar K, Pokhrel AP, Yao T

    Bulletin of Glacier Research   Vol. 15   page: 53-58   1997.7

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    Language:English  

  194. Monitoring and prediction of shrinkage of a small glacier in the Nepal Himalaya. Reviewed

    Kadota T, Fujita K, Seko K, Kayastha RB, Ageta Y

    Annals of Glaciology   Vol. 24   page: 90-94   1997

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  195. Some aspects of mass balance of Xiao Dongkemadi Glacier in the Tanggula Mountains on the Tibetan Plateau, 1989-94. Reviewed

    Ageta Y, Seko K, Fujita K, Pu J, Yao T

    Cryosphere   Vol. 3   page: 68-72   1997

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    Language:English   Publishing type:Research paper (scientific journal)  

  196. Changes in glaciers in Hidden Valley, Mukut Himal, Nepal Himalayas, from 1974 to 1994. Reviewed

    Fujita K, Nakawo M, Fujii Y, Paudyal P

    Journal of Glaciology   Vol. 43 ( 145 ) page: 583-588   1997

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  197. Glaciological research in Hidden Valley, Mukut Himal in 1994. Reviewed

    Fujii Y, Fujita K, Paudyal P

    Bulletin of Glacier Research   Vol. 14   page: 7-11   1996.5

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  198. ネパール・クンブー地方 「1995年パンガ雪崩」報告. Reviewed

    山田知充, 伏見碩二, Aryal R, 門田勤, 藤田耕史, 瀬古勝基, 安成哲三

    雪氷   Vol. 58 ( 2 ) page: 145-155   1996.3

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    Language:Japanese  

  199. Energy budget at ELA on Dongkemadi Glacier in the Tanggula Mts. Tibetan Plateau. Reviewed

    Zhang Y, Yao T, Pu J, Ohata T, Yabuki H, Fujita K

    Journal of Glaciology and Geocryology   Vol. 18 ( 1 ) page: 10-19   1996

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    Publishing type:Research paper (scientific journal)  

  200. Characteristics of mass balance of summer-accumulation type glaciers in the Himalayas and Tibetan Plateau. Reviewed

    Ageta Y, Fujita K

    Zeitschrift für Gletscherkunde und Glazialgeologie   Vol. 32   page: 61-65   1996

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    Language:English   Publishing type:Research paper (scientific journal)  

  201. Superimposed ice in glacier mass balance on the Tibetan Plateau. Reviewed

    Fujita K, Seko K, Ageta Y, Pu J, Yao T

    Journal of Glaciology   Vol. 42 ( 142 ) page: 454-460   1996

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  202. A comparison of mass balance between the Meikuang Glacier and the Xiao Dongkemadi Glacier, Tibetan Plateau. Reviewed

    Pu J, Yao T, Seko K, Ageta Y, Fujita K, Zhang Y, Tian L

    Cryosphere   Vol. 2   page: 81-86   1996

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    Language:English   Publishing type:Research paper (scientific journal)  

  203. An experimental study of climate and ablation at the equilibrium line of Dongkemadi glacier, Tanggula Mountains, Qinghai-Xizang Plateau. Reviewed

    Zhang Y, Yao T, Xie Z, Fujita K

    Zeitschrift für Gletscherkunde und Glazialgeologie   Vol. 32   page: 67-74   1996

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    Language:English   Publishing type:Research paper (scientific journal)  

  204. Mass balance on the Dongkemadi and Meikuang Glaciers in 1992/1993. Reviewed

    Pu J, Yao T, Zhang Y, Seko K, Fujita K

    Journal of Glaciology and Geocryology   Vol. 17 ( 2 ) page: 138-141   1995

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    Publishing type:Research paper (scientific journal)  

  205. Glaciological observation in the Tanggula Mts., Tibetan Plateau. Reviewed

    Seko K, Pu J, Fujita K, Ageta Y, Ohata T, Yao T

    Bulletin of Glacier Research   Vol. 12   page: 57-67   1994.8

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Books 2

  1. ヒマラヤの氷河湖-決壊洪水GLOFの爪痕.宇宙から見た地形-日本と世界

    藤田耕史加藤碵一, 山口靖, 渡辺宏, 山崎晴雄, 汐川雄一, 薦田麻子 編( Role: Joint author)

    朝倉書店  2010.2 

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    Language:Japanese

  2. ヒマラヤと地球温暖化-消えゆく氷河

    中尾正義, 竹内 望, 藤田耕史, 坂井亜規子( Role: Joint author)

    昭和堂  2007 

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    Language:Japanese

MISC 7

  1. Up-glacier propagation of surface lowering of Yala Glacier in Nepal Himalaya

    砂子宗次朗, 藤田耕史, 泉岳樹, 山口悟, 坂井亜規子, KAYASTHA Rijan B

    雪氷研究大会講演要旨集(Web)   Vol. 2021   2021

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  2. Scientist Profile Invited

    Fujita K

    Third Pole Environment Newsletter   Vol. 11   page: 3   2017.9

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    Language:English  

  3. 2015 年ランタン大なだれ-冬季の大雪によって増幅された被害- Invited

    藤田耕史

    Japan Geoscience Letters   Vol. 13 ( 3 ) page: 1 - 3   2017.8

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:日本地球惑星科学連合  

    CiNii Books

  4. 2015 年ネパール・ゴルカ地震による地盤災害に対する地形と地質の抑制 Invited

    藤田耕史, 坂井亜規子

    Japanese Scientists in Science 2016   Vol. 2016   page: 15   2017.3

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  5. 雪氷研究大会(2016・名古屋)開催報告

    実行委員会, 藤田耕史, 青木輝夫, 松田益義, 坂井亜規子, 本山秀明, 大畑哲夫, 高橋徹, 中村一樹, 三上正洋, 澤田結基, 西村浩一

    雪氷   Vol. 79 ( 1 ) page: 150 - 155   2017.1

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    Language:Japanese   Publishing type:Meeting report  

  6. Reports on JSSI & JSSE Joint Conference on Snow and Ice Research in Nagoya, 2016

      Vol. 33 ( 1 ) page: 2 - 7   2017.1

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    Language:Japanese   Publishing type:Meeting report  

    CiNii Books

  7. 「北極域における積雪汚染及び雪氷微生物が急激な温暖化に及ぼす影響評価に関する研究(SIGMAプロジェクト)」によるグリーンランド観測

    青木輝夫, 庭野匡思, 谷川朋範, 橋本明弘, 的場澄人, 杉山慎, 竹内望, 本山秀明, 永塚尚子, 植竹淳, 堀雅裕, 島田利元, 山口悟, 藤田耕史, 山崎哲秀

    極地   Vol. 53 ( 1 ) page: 34 - 40   2017

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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Presentations 371

  1. Climate Hazards in the Himalayan Cryosphere Invited International conference

    Fujita K

    First Workshop on Projection and Mitigation of Mega-Geo-Disasters under Changing Climate  2024.3.15  Tribuvan University

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    Event date: 2024.3

    Language:English   Presentation type:Oral presentation (keynote)  

    Venue:Kathmandu   Country:Nepal  

  2. Estimating seasonal fluctuations and aspect characteristics of ice cliff backwasting on debris-covered Trakarding Glacier, Rolwaling Valley, eastern Nepal Himalaya. International coauthorship International conference

    Sato Y, Buri P, Miles ES, Kneib M, Sunako S, Gurung TR, Sakai A, Pellicciotti F, Fujita K

    American Geophysical Union Fall Meeting 2023  2023.12  American Geophysical Union

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    Event date: 2023.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:San Francisco  

  3. Snow accumulation inferred from a GPR survey around the Southeastern Dome, Greenland Ice Sheet.

    Sakata H, Minowa M, Fujita K, Matoba S, Kawakami K, Matsumoto M, Iizuka Y

    2023.11.15 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Poster presentation  

  4. Regional variations in mineralogy of dust in ice cores obtained from northeastern and northwestern Greenland over the past 100 years. International coauthorship

    Nagatsuka N, Goto-Azuma K, Fujita K, Komuro Y, Hirabayashi M, Ogata J, Fukuda K, Ogawa-Tsukagawa Y, Kitamura K, Yonekura A, Nakazawa F, Onuma Y, Kurita N, Rasmussen SO, Sinnl G, Popp TJ, Dahl-Jensen D

    2023.11.15 

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    Event date: 2023.11

    Language:Japanese   Presentation type:Poster presentation  

  5. Himalayan Glacier Research: initiation, development, and future Invited International conference

    Fujita K

    International Conference on Mountain Hydrology and Cryosphere (ICMHC-2023)  2023.11.10  International Association of Hydrological Sciences

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (keynote)  

    Venue:Kathmandu and Dhulikhel   Country:Nepal  

  6. Land-surface modeling in HMA glacierized catchments: challenges and opportunities International coauthorship International conference

    Jouberton A, Fugger S, Buri P, Shaw TE, Miles ES, McCarthy M, Sato Y, Hashimoto A, Niwano M, Fujita K, Pellicciotti F

    International Conference on Mountain Hydrology and Cryosphere (ICMHC-2023)  2023.11.10  International Association of Hydrological Sciences

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kathmandu and Dhulikhel   Country:Nepal  

  7. The analyses of insoluble particles of the ice core from Trambau glacier, Nepal Himalaya International conference

    Esashi N, Tsushima A, Uemura R, Matoba S, Iizuka Y, Adachi K, Kinase T, Fujita K

    International Conference on Mountain Hydrology and Cryosphere (ICMHC-2023)  2023.11.10  International Association of Hydrological Sciences

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kathmandu and Dhulikhel   Country:Nepal  

  8. Estimation of ice melt, freshwater budget and their multi-decadal trends in the Baffin Bay and Labrador Sea.

    Mensah V, Fujita K, Ikeda M, Komatsu M, Ohshima KI

    日本海洋学会 2023年度秋季大会  2023.9 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:京都  

  9. ネパール・ヒマラヤ, トランバウ氷河アイスコアの不溶性微粒子の解析.

    江刺和音, 對馬あかね, 植村立, 的場澄人, 飯塚芳徳, 足立光司, 木名瀬健, 藤田耕史

    雪氷研究大会  2023.9.4  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:郡山  

  10. デブリを考慮した熱収支氷河モデルによるアジア高山域での氷河流出量推定.

    佐々木織江, 石川こより, 藤田耕史, 坂井亜規子, 鼎信次郎

    水文・水資源学会/日本水文科学会2023年度研究発表会  2023.9  水文・水資源学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:長崎  

  11. グリーンランド南東ドームアイスコアにおける積雪構造と圧密氷化過程.

    松本真依, 飯塚芳徳, 斎藤健, 川上薫, 捧茉優, 安達聖, 八久保晶弘, 青木輝夫, 藤田秀二, 藤田耕史, 堀彰, 高杉啓太, 的場澄人

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  12. ヒマラヤ山岳域の局地気象日変化の再現実験 その2.

    橋本明弘, 藤波初木, 佐々木織江, 坂井亜規子, 藤田耕史

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  13. 北極域の氷河氷床上で観測された気象データの品質管理方法の提案-グリーンランド北西部SIGMA-A,SIGMA-Bサイトの例-.

    西村基志, 青木輝夫, 庭野匡思, 的場澄人, 谷川朋範, 山口悟, 山崎哲秀, 藤田耕史

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  14. グリーンランド氷床北東部および北西部における過去100年間の鉱物組成変動の比較. International coauthorship

    永塚尚子, 東久美子, 藤田耕史, 小室悠紀, 平林幹啓, 尾形純, 福田かおり, 北村享太郎, 中澤文男, 大沼友貴彦, 栗田直幸, Rasmussen SO, Sinnl G, Popp TJ, Dahl-Jensen D

    雪氷研究大会  2023.9.6  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:郡山  

  15. モンゴル・アルタイ山脈,ポターニン氷河における氷厚探査及び表面測量. International coauthorship

    砂子宗次朗, 坂井亜規子, Khalzan P, 佐藤洋太, 石田直也, 福井幸太郎, 藤田耕史

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  16. ネパール・ヒマラヤ トラカルディン氷河における氷壁の融解特性. International coauthorship

    佐藤洋太, Buri P, Miles ES, Kneib M, 砂子宗次朗, Gurung TR, 坂井亜規子, Pellicciotti F, 藤田耕史

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  17. 地中レーダーを用いたグリーンランド氷床南東ドームにおける涵養量の時空間変動復元.

    坂田宙斗, 箕輪昌紘, 藤田耕史, 的場澄人, 飯塚芳徳

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  18. グリーンランド氷床EGRIP浅層コアの年代決定と鉱物ダスト分析. International coauthorship

    小室悠紀, 中澤文男, 東久美子, 永塚尚子, 平林幹啓, 尾形純, 福田かおり, 栗田直幸, 藤田耕史, 北村享太郎, Rasmussen SO, Sinnl G, Popp TJ, Dahl-Jensen D

    雪氷研究大会  2023.9.5  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:郡山  

  19. モンゴル西部河川流量に対する氷河融解水の寄与. International coauthorship

    Khalzan P, Sadyrov S, 坂井亜規子, 田中賢治, 藤田耕史

    雪氷研究大会  2023.9.6  日本雪氷学会

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:郡山  

  20. On the representation of precipitation phase and its impact on glacier changes in HMA catchments. International coauthorship International conference

    Jouberton A, Shaw T, Fugger S, Miles ES, Buri B, McCarthy M, Sato Y, Hashimoto A, Niwano M, Fujita K, Pellicciotti F

    IUGG General Assembly 2023  2023.7  International Union of Geodesy and Geophysics

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    Event date: 2023.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Berlin  

  21. Automatic detection of snowline altitude using high-resolution satellite imageries over the Himalayas. International coauthorship International conference

    Sasaki O, Miles ES, Pellicciotti F, Sakai A, Fujita K

    IUGG General Assembly 2023  2023.7  International Union of Geodesy and Geophysics

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    Event date: 2023.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Berlin  

  22. 後期完新世における中央アジア天山山脈のアイスコアによる環境復元と民族移動の比較研究. International coauthorship

    伊藤彩也香, 竹内望, 久米正吾, Schwikowski M, 藤田耕史, Aizen VB

    日本地球惑星科学連合大会  2023.5.22  日本地球惑星科学連合

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online  

  23. グリーンランドの高時間分解能アイスコアに記録された夏季のDMS排出量の増加とその要因について

    黒﨑豊, 的場澄人, 飯塚芳徳, 藤田耕史, 島田利元

    日本地球惑星科学連合大会  2023.5.24  日本地球惑星科学連合

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online  

  24. グリーンランドアイスコアから復元する過去100年の鉱物ダスト起源変動と空間分布. International coauthorship

    永塚尚子, 東久美子, 對馬あかね, 藤田耕史, 的場澄人, 大沼友貴彦, 小室悠紀, 平林幹啓, 尾形純, 塚川佳美, 北村享太郎, 青木輝夫, Popp TJ, Dahl-Jensen D

    日本地球惑星科学連合大会  2023.5.22  日本地球惑星科学連合

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    Event date: 2023.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張 & online  

  25. A 220-year record of accumulation rate and melting history of the SE-Dome II ice core from southeastern Greenland. Invited

    川上薫, 飯塚芳徳, 捧美優, 松本真衣, 斎藤健, 堀彰, 石野咲子, 藤田秀二, 藤田耕史, 高杉啓太, 畠山匠, 浜本佐彩, 渡利晃久, 江刺和音, 大塚美侑, 植村立, 堀内一穂, 箕輪昌紘, 服部祥平, 青木輝夫, 平林幹啓, 川村賢二, 的場澄人

    日本地球惑星科学連合大会  2023.5.22  日本地球惑星科学連合

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online  

  26. Toward improvement of satellite-derived thermal resistance for supra-glacial debris International coauthorship International conference

    Nagai H, Nuimura T, Takigawa M, Patel L, Laha S, Pratap B, Konya K, Sharma P, Fujita K, Sato Y, Sakai A

    EGU General Assembly 2023  2023.4.28  European Geoscience Union

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    Event date: 2023.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna  

  27. MODIS-derived snow/ice physical parameters and their relationships to albedo over the Greenland ice sheet International coauthorship International conference

    Aoki T, Shimada R, Matoba S, Niwano M, Ishimoto H, Tanikawa T, Hori M, Stamnes K, Yamaguchi S, Yamasaki T, Fujita K, Iizuka Y, Schneebeli M, Carmagnola C

    ISAR-7: Seventh International Symposium on Arctic Research  2023.3.8 

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    Event date: 2023.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tokyo, Japan  

  28. Variations in mineralogy of dust in ice cores obtained from Greenland over the past 100 years International coauthorship International conference

    Nagatsuka N, Goto-Azuma K, Tsushima A, Fujita K, Matoba S, Onuma Y, Komuro Y, Hirabayashi M, Ogata J, Ogawa-Tsukagawa Y, Kitamura K, Aoki T, Popp TJ, Dahl-Jensen D

    ISAR-7: Seventh International Symposium on Arctic Research  2023.3.8 

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    Event date: 2023.3

    Language:English   Presentation type:Poster presentation  

    Venue:Tokyo, Japan  

  29. Snow accumulation inferred from a GPR survey around the Southeastern Dome, Greenland Ice Sheet International coauthorship International conference

    Minowa M, Fujita K, Matoba S, Iizuka Y

    ISAR-7: Seventh International Symposium on Arctic Research  2023.3.8 

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    Event date: 2023.3

    Language:English   Presentation type:Poster presentation  

    Venue:Tokyo, Japan  

  30. Accumulation rate at a semiannual accuracy and melting history of an ice core from southeastern Greenland (SE-Dome II) dating back to preindustrial International coauthorship International conference

    Kawakami K, Iizuka Y, Sasage M, Matsumoto M, Saito T, Hori A, Ishino S, Fujita S, Fujita K, Takasugi K, Hatayama T, Hamamoto S, Watari A, Esashi N, Otsuka M, Uemura R, Horiuchi K, Minowa M, Hattori S, Aoki T, Hirabayashi M, Kawamura K, Matoba S

    ISAR-7: Seventh International Symposium on Arctic Research  2023.3.8 

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    Event date: 2023.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tokyo, Japan  

  31. Foehn winds drive surface ablation of a Patagonian glacier. International coauthorship International conference

    Minowa M, Fujita K, Skvarca P

    American Geophysical Union Fall Meeting 2022  2022.12.17  American Geophysical Union

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    Event date: 2022.12

    Language:English   Presentation type:Poster presentation  

    Venue:Chicago   Country:United States  

  32. Assessment of the water balance components using energy and mass balance models in small glaciated catchments of the central Tian-Shan, Kyrgyzstan. International coauthorship International conference

    Sadyrov S, Tanaka K, Khujanazarov T, Fujita K, Satylkanov R

    American Geophysical Union Fall Meeting 2022  2022.12.14  American Geophysical Union

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    Event date: 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Chicago   Country:United States  

  33. Snow accumulation inferred from a GPR survey around the Southeastern Dome, Greenland Ice Sheet.

    Minowa M, Fujita K, Matoba S, Iizuka Y

    2022.11.16 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Poster presentation  

  34. Variations in mineralogy of dust in ice cores obtained from northwestern and northeastern Greenland over the past 100 years. International coauthorship

    Nagatsuka N, Goto-Azuma K, Tsushima A, Fujita K, Matoba S, Onuma Y, Komuro Y, Hirabayashi M, Ogata J, Ogawa-Tsukagawa Y, Kitamura K, Aoki T, Popp TJ, Dahl-Jensen D

    2022.11.16 

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    Event date: 2022.11

    Language:Japanese   Presentation type:Poster presentation  

  35. ネパールヒマラヤにおける夏季降水量の日周期変調.

    藤波初木, 金森大成, 佐藤洋太, 佐藤友徳, 藤田耕史

    日本気象学会秋季大会  2022.10.27  日本気象学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌   Country:Japan  

  36. Land Surface Modelling in the Himalayas: On the Importance of Evaporative Fluxes for the Water Balance of a High Elevation Catchment. International coauthorship International conference

    Buri P, Fatichi S, Shaw TE, Miles ES, McCarthy M, Fyffe C, Fugger S, Ren ST, Kneib M, Fujita K, Pellicciotti F

    2022 Dragon 5 Mid-term Results Symposium  2022.10.19 

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    Event date: 2022.10

    Language:English   Presentation type:Poster presentation  

    Venue:Online  

  37. Combining High Resolution Atmospheric Simulations And Land-surface Modelling To Understand High Elevation Snow Processes In An Himalayan Catchment International coauthorship International conference

    Jouberton A, Sato Y, Hashimoto A, Niwano M, Shaw TE, Miles ES, Buri P, Fugger S, McCarthy M, Fujita K, Pellicciotti F

    2022 Dragon 5 Mid-term Results Symposium  2022.10.19 

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    Event date: 2022.10

    Language:English   Presentation type:Poster presentation  

    Venue:Online  

  38. 中央アジア・パミールアライ山域で掘削されたアイスコアの溶存化学成分分析. International coauthorship

    瀬戸大貴, 竹内望, 對馬あかね, 鋸屋遥香, 藤田耕史, 川村賢二, Aizen VB

    雪氷研究大会  2022.10.3  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌 & online   Country:Japan  

  39. ネパールヒマラヤ,トランバウ氷河で掘削されたアイスコアの不溶性不純物の顕微鏡分析.

    小西ふき, 竹内望, 對馬あかね, 江刺和音, 植村立, 的場澄人, 飯塚芳徳, 藤田耕史

    雪氷研究大会  2022.10.3  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌 & online   Country:Japan  

  40. グリーンランド南東ドームアイスコアにおける近赤外反射率の測定.

    松本真依, 飯塚芳徳, 斎藤健, 川上薫, 捧茉優, 安達聖, 青木輝夫, 藤田耕史, 藤田秀二, 堀彰, 高杉啓太, 的場澄人

    雪氷研究大会  2022.10.3  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:札幌 & online   Country:Japan  

  41. アイスコアを用いたグリーンランド氷床北部における過去100年間の鉱物組成変動の空間分布. International coauthorship

    永塚尚子, 東久美子, 對馬あかね, 藤田耕史, 的場澄人, 大沼友貴彦, 小室悠紀, 平林幹啓, 尾形純, 塚川佳美, 北村享太郎, 青木輝夫, Popp T, Dahl-Jensen D

    雪氷研究大会  2022.10.1  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌 & online   Country:Japan  

  42. グリーンランド北西部氷河上で発生するクリオコナイトホール崩壊現象の数値モデル開発.

    大沼友貴彦, 藤田耕史, 竹内望, 庭野匡思, 青木輝夫

    雪氷研究大会  2022.10.1  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌 & online   Country:Japan  

  43. アルタイ山脈におけるアルベド解析. International coauthorship

    石田直也, 坂井亜規子, Khalzan P, 藤田耕史

    雪氷研究大会  2022.10.1  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌 & online   Country:Japan  

  44. ヒマラヤ山岳域の局地気象日変化の再現実験.

    橋本明弘, 藤波初木, 佐々木織江, 坂井亜規子, 藤田耕史

    雪氷研究大会  2022.10.1  日本雪氷学会

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    Event date: 2022.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:札幌 & online   Country:Japan  

  45. グリーンランドアイスコアから復元する過去100年の鉱物ダスト起源とその変動要因の解明. Invited

    永塚尚子, 東久美子, 對馬あかね, 藤田耕史, 的場澄人, 大沼友貴彦, 青木輝夫

    地球化学会第69回年会  2022.9.7  地球化学会

     More details

    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online & 高知   Country:Japan  

  46. グリーンランド南東部SE-Domeアイスコアによる北大西洋季節海氷域の近年のDMS放出量の増加について.

    黒﨑豊, 的場澄人, 飯塚芳徳, 藤田耕史, 島田利元

    地球化学会第69回年会  2022.9.7  地球化学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online & 高知   Country:Japan  

  47. Ice cliff mass-loss of debris-covered Trakarding Glacier, Rolwaling region, eastern Nepal Himalaya. International coauthorship International conference

    Sato Y, Buri P, Miles ES, Kneib M, Sunako S, Sakai A, Pellicciotti, Fujita K

    EGU General Assembly 2022  2022.5.24  EGU

     More details

    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online & Vienna   Country:Austria  

  48. Dissecting the subseasonal and altitudinal water balance of a high-elevation Himalayan catchment using a land surface model. International coauthorship International conference

    Buri P, Fatichi S, Shaw TE, Miles ES, Fyffe C, Fugger S, Ren S, Kneib M, Fujita K, Pellicciotti F

    EGU General Assembly 2022  2022.5.24  EGU

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    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online & Vienna   Country:Austria  

  49. Combining high resolution atmospheric simulations and land-surface modelling to understand high elevation snow processes in an Himalayan catchment. International coauthorship International conference

    Jouberton A, Sato Y, Hashimoto A, Niwano M, Shaw TE, Miles ES, Buri P, Fugger S, McCarthy M, Fujita K, Pellicciotti F

    EGU General Assembly 2022  2022.5.24  EGU

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    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online & Vienna   Country:Austria  

  50. Sulfur isotope ratio of sulfate aerosols in an Antarctic Dome Fuji ice core during the last glacial period: a potential contribution from the Atacama Desert.

    2022.5.26 

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  51. ネパール・ヒマラヤ, トランバウ氷河アイスコアの水安定同位体・不溶性微粒子分析.

    江刺和音, 對馬あかね, 植村立, 的場澄人, 飯塚芳徳, 藤田耕史

    日本地球惑星科学連合大会  2022.6.3  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張 & online   Country:Japan  

  52. A heavy rainfall event in the eastern Nepal Himalayas caused by multi-scale processes. International coauthorship

    藤波初木, 平田英隆, 藤田耕史, 金森大成, 佐藤洋太, 加藤雅也, Kayastha RB

    日本地球惑星科学連合大会  2022.5.23  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online   Country:Japan  

  53. グリーンランド南東ドームアイスコアの初期解析報告.

    飯塚芳徳, 川上薫, 捧美優, 松本真衣, 斎藤健, 堀彰, 高杉啓太, 畠山匠, 渡利晃久, 江刺和音, 大塚美侑, 宮本淳, 植村立, 石野咲子, 藤田秀二, 青木輝夫, 藤田耕史, 服部祥平, 堀内一穂, 平林幹啓, 川村賢二, 的場澄人

    日本地球惑星科学連合大会  2022.5.26  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online   Country:Japan  

  54. Glacier albedo analysis in Altai mountains, 2000-2020. International coauthorship

    石田直也, 坂井亜規子, Khalzan P, 藤田耕史

    日本地球惑星科学連合大会  2022.5.26  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online   Country:Japan  

  55. ネパールヒマラヤ,トランバウ氷河で掘削されたアイスコアの不溶性不純物の顕微鏡観察.

    小西ふき, 竹内望, 對馬あかね, 江刺和音, 植村立, 的場澄人, 飯塚芳徳, 藤田耕史

    日本地球惑星科学連合大会  2022.5.26  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online   Country:Japan  

  56. グリーンランドSIGMA-Aアイスコアにおける近赤外反射率の測定.

    松本真衣, 飯塚芳徳, 斎藤健, 藤田耕史, 青木輝夫

    日本地球惑星科学連合大会  2022.6.3  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張 & online   Country:Japan  

  57. グリーンランド北西部および北東部で掘削されたアイスコア中の過去100年間の鉱物組成変動の比較. Invited International coauthorship

    永塚尚子, 東久美子, 對馬あかね, 藤田耕史, 的場澄人, 大沼友貴彦, 小室悠紀, 平林幹啓, 尾形純, 塚川佳美, 北村享太郎, 青木輝夫, Popp T, Dahl-Jensen D

    日本地球惑星科学連合大会  2022.5.26  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張 & online   Country:Japan  

  58. Dynamically constrained steady-state mass balance of Trambau Glacier, Rolwaling region, Nepal Himalaya. International coauthorship

    2022.6.3 

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  59. ネパール・ヒマラヤ トラカルディン氷河における氷壁融解量の推定. International coauthorship

    佐藤洋太, Buri P, Miles ES, Kneib M, 砂子宗次朗, 坂井亜規子, Pellicciotti F, 藤田耕史

    日本地球惑星科学連合大会  2022.6.3  日本地球惑星科学連合

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    Event date: 2022.5 - 2022.6

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張 & online   Country:Japan  

  60. Sulfur isotope ratio of sulfate aerosols in an Antarctic Dome Fuji ice core during the last glacial period: a potential contribution from the Atacama Desert. International conference

    Uemura R, Masaka K, Iizuka Y, Hirabayashi M, Matsui H, Matsumoto R, Uemura M, Fujita K, Motoyama H

    PAGES Open Science Meeting  2022.5  PAGES

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    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  61. Precipitation and its variability in the high elevation area of the Nepal Himalayas. International coauthorship International conference

    Fujinami H, Fujita K, Takahashi N, Sato T, Hirata H, Kanamori H, Sato Y, Gurung TR, Kayastha RB, Shrestha ML

    Seventh WMO International Workshop on Monsoons (IWM-7)  2022.3.26  WMO

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  62. Behind the Himalayan glacier fields Invited International conference

    Fujita K

    IGS Global Seminar series  2022.2.10  International Glaciological Society

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    Event date: 2022.2

    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

    Venue:Online  

  63. Performance evaluation of existing algorithms and datasets for glacier surface velocity estimation in Himalayan glaciers. International coauthorship International conference

    Khadka M, Steiner JF, Hassan J, Maussion F, Fujita K, Gurung TR, He XB, Liu Q, Mandal A, Miles ES, Quincey DJ, Wagnon P, Watson SC, Yang W

    American Geophysical Union Fall Meeting 2021  2021.12.14  American Geophysical Union

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    Event date: 2021.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  64. Impacts of anthropogenic emissions on tropospheric reactive bromine since the preindustrial. International coauthorship International conference

    Zhai S, Wang X, McConnell JR, Swanson W, Sherwen T, Pound R, Chellman N, Zhu L, Evans MJ, Opel T, Sigl M, Meyer H, Hattori S, Fujita K, Chan YC, Alexander B

    American Geophysical Union Fall Meeting 2021  2021.12.17  American Geophysical Union

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    Event date: 2021.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  65. Variations in mineralogy of dust in ice cores obtained from Greenland over the past 100 years.

    Nagatsuka N, Goto-Azuma K, Tsushima A, Fujita K, Matoba S, Onuma Y, Dallmayr R, Kadota M, Hirabayashi M, Ogata J, Ogawa-Tsukagawa T, Kitamura K, Minowa M, Komuro Y, Motoyama H, Aoki T, Nakazawa F, Popp TJ, Dahl-Jensen D

    2021.11.17 

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    Event date: 2021.11

    Language:Japanese   Presentation type:Poster presentation  

  66. グリーンランド南東ドームにおけるアイスコア掘削と気象・雪氷観測.

    飯塚芳徳, 的場澄人, 箕輪昌紘, 山崎哲秀, 川上薫, 角五綾子, 宮原盛厚, 藤田耕史, 橋本明弘, 庭野匡思, 谷川朋範, 青木輝夫

    雪氷研究大会  2021.9.15  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Online  

  67. ネパール・ヒマラヤ, トランバウ氷河アイスコアの水安定同位体分析.

    江刺和音, 對馬あかね, 植村立, 飯塚芳徳, 的場澄人, 藤田耕史

    雪氷研究大会  2021.9.13  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  68. 高時間分解能アイスコアによる近年の北大西洋植物プランクトンブルームの長期化の解明.

    黒﨑豊, 的場澄人, 飯塚芳徳, 藤田耕史, 島田利元

    雪氷研究大会  2021.9.13  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  69. グリーンランド南東ドームアイスコアから復元する硫酸エアロゾルと北半球中高緯度の雲量の関係.

    渡利晃久, 飯塚芳徳, 藤田耕史, 増永浩彦, 河本和明

    雪氷研究大会  2021.9.13  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  70. 氷河変動を制御する気候因子について.

    坂井亜規子, 藤田耕史

    雪氷研究大会  2021.9.14  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Online  

  71. ヒマラヤ高山域におけるSentinel-2/Landsat 画像を用いた雪線高度の検出. International coauthorship

    佐々木織江, Miles ES, Pellicciotti F, 坂井亜規子, 藤田耕史

    雪氷研究大会  2021.9.16  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  72. ブータンヒマラヤにおける末端氷河湖の形成に伴う氷河縮小量の変化. International coauthorship

    佐藤洋太, 藤田耕史, 井上公, 坂井亜規子, Karma K

    雪氷研究大会  2021.9.14  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Online  

  73. ネパールヒマラヤ・ヤラ氷河における上流への表面標高低下伝番. International coauthorship

    砂子宗次朗, 藤田耕史, 泉岳樹, 山口悟, 坂井亜規子, Kayastha RB

    雪氷研究大会  2021.9.14  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Online  

  74. 中央アジア・パミールアライ山域で掘削されたアイスコアの溶存化学成分. International coauthorship

    瀬戸大貴, 鋸屋遥香, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, Aizen V

    雪氷研究大会  2021.9.14  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  75. グリーンランドで掘削されたアイスコア中の過去100年間の鉱物組成変動. International coauthorship

    永塚尚子, 東久美子, 對馬あかね, 藤田耕史, 的場澄人, 大沼友貴彦, Dallmayr R, 門田萌, 平林啓幹, 尾形純, 小室悠紀, 本山秀明, 青木輝夫, 中澤文男, Popp TJ, Dahl-Jensen D

    雪氷研究大会  2021.9.13  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  76. パタゴニア ペリート・モレノ氷河の表面質量収支と気候. International coauthorship

    箕輪昌紘, 藤田耕史, Skvarca P

    雪氷研究大会  2021.9.16  日本雪氷学会

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  77. 硫酸の三酸素同位体組成を用いたSO2排出抑制期におけるケミカルフィードバック機構の解明. International coauthorship

    服部祥平, 飯塚芳徳, Alexander B, 石野咲子, 藤田耕史, Zhai S, Sherwen T, 大島長, 植村立, 山田明憲, 鈴木希実, 的場澄人, 鶴田明日香, Savarino J, 吉田尚弘

    地球化学会第68回年会  2021.9.9  地球化学会

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    Event date: 2021.9

    Venue:弘前&Online  

  78. Twice-daily maxima of summer precipitation in high-altitude areas of the Himalayas: two contrasting land surface effects. International conference

    Fujinami H, Fujita K, Takahashi N, Sato T, Kanamori H, Sunako S

    Asia Oceania Geosciences Society (AOGS) 18th Annual Meeting  2021.8.6  Asia Oceania Geosciences Society (AOGS)

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    Event date: 2021.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  79. The correlations between cloud amount over Northern mid-high latitudes and aerosol proxies preserved in the SE-Dome ice core, Greenland.

    2021.5.31 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  80. Possible albedo reduction of snow surface due to black carbon over the past 350 years on the Greenland Ice Sheet estimated from the SIGMA-D ice core.

    2021.5.31 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  81. A biomass burning record over the past 350 years in an ice core from Northwest Greenland.

    2021.5.31 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  82. Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya.

    2021.5.31 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  83. An attempt to reconstruct air temperature in the past using DNA information in ice core samples on Gregoriev Glacier, Kyrgyz Tienshan.

    2021.5.31 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  84. ヒマラヤ高山域の降水再現実験における地形平滑化に対する依存性.

    橋本明弘, 佐々木織江, 坂井亜規子, 藤田耕史

    日本地球惑星科学連合大会  2021.5.31  日本地球惑星科学連合

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Online  

  85. 2019年7月にネパール・ロールワリン地域で発生した豪雨の発生過程.

    平田英隆, 藤波初木, 金森大成, 加藤雅也, 佐藤洋太, 藤田耕史, 坪木和久

    日本気象学会秋季春季大会  2021.5.19  日本気象学会

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    Event date: 2021.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:つくば&Online  

  86. Central Asianglaciers passedthe warm periods in Holocene. International coauthorship International conference

    Aizen EM, Aizen VB, Takeuchi N, Fujita K

    24th Virtual Alpine Glaciology Meeting  2021.3.26 

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    Event date: 2021.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  87. Physically based summer temperature reconstruction from melt layers in ice cores. Invited International conference

    Fujita K, Iizuka Y, Matoba S, Takeuchi N, Tsushima A, Kurosaki Y, Aoki T

    International Arctic Science Committee (IASC) Network on Arctic Glaciology (NAG) 

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    Event date: 2021.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Online  

  88. The analysis of water stable isotopes of the ice core from Trambau glacier, Nepal Himalaya

    Esashi Nao, Tsushima Akane, Uemura Ryu, Iizuka Yoshinori, Matoba Sumito, Fujita Koji

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2021  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2021

    Language:Japanese  

  89. Chemical composition of ice-core drilled in the Pamir-Alay Mountains in the Central Asia

    瀬戸大貴, 鋸屋遥, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, AIZEN Vladimir

    雪氷研究大会講演要旨集(Web)  2021 

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    Event date: 2021

  90. Snowline altitude in Himalayan glacierized catchments from Sentinel-2/Landsat imageries

    佐々木織江, MILES Evan S., PELLICCIOTTI Francesca, 坂井亜規子, 藤田耕史

    雪氷研究大会講演要旨集(Web)  2021 

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    Event date: 2021

  91. Isotopic evidence for changes in sulfate formation after SO2 emission control

    Hattori Shohei, Iizuka Yoshinori, Alexander Becky, Ishino Sakiko, Fujita Koji, Zhai Shuting, Sherwen Tomas, Oshima Naga, Uemura Ryu, Yamada Akinori, Suzuki Nozomi, Matoba Sumito, Tsuruta Asuka, Savarino Joel, Yoshida Naohiro

    Abstracts of Annual Meeting of the Geochemical Society of Japan  2021  GEOCHEMICAL SOCIETY OF JAPAN

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    Event date: 2021

    Language:Japanese  

  92. Twice-daily maxima of summer precipitation in high-altitude areas of the Himalayas: two contrasting land surface effects. International conference

    Fujinami H, Fujita K, Takahashi N, Sato T, Kanamori H, Sunako S, Sakai A

    American Geophysical Union Fall Meeting 2020 

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    Event date: 2020.12

    Language:English   Presentation type:Poster presentation  

    Venue:Online   Country:United States  

  93. Impacts of anthropogenic emissions on tropospheric reactive chlorine: Implications for Greenland ice core records of chlorine. International conference

    Zhai S, Wang X, Geng L, McConnell JR, Sherwen T, Pound R, Chellman N, Moch J, Zhu L, Evans MJ, Cole-Dai J, Opel T, Sigl M, Hanno Meyer H, Hattori S, Iizuka Y, Fujita K, Chan YC, Becky Alexander B

    American Geophysical Union Fall Meeting 2020 

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    Event date: 2020.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online   Country:United States  

  94. グリーンランド南東ドームアイスコアから復元するエアロゾルと北半球中高緯度の雲量の関係.

    渡利晃久, 飯塚芳徳, 藤田耕史

    雪氷研究大会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  95. 南パタゴニア氷原のカービング氷河における1979-2000年の表面標高変化測定.

    波多俊太郎, 杉山慎, 藤田耕史

    雪氷研究大会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

  96. 中央アジア・パミールアライ山域で掘削したアイスコアの花粉分析.

    鋸屋遥香, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, 宮内謙史郎, 堀燿一朗, Aizen VB, Osmonov A

    雪氷研究大会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  97. ネパール・ヒマラヤ トラカルディン氷河における氷壁ダイナミクスの解明.

    佐藤洋太, 藤田耕史, 井上公, 砂子宗次朗, 坂井亜規子, 對馬あかね, Podolskiy EA, Berthier E, Kayastha R, Kayastha RB

    雪氷研究大会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

  98. ヒマラヤ山脈の高標高域における降水量の日変化.

    藤波初木, 藤田耕史, 高橋暢宏, 佐藤友徳, 金森大成, 砂子宗次朗, 坂井亜規子

    日本気象学会秋季大会 

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    Event date: 2020.10

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

  99. 札幌における光吸収性積雪不純物濃度の年々および季節変動傾向.

    對馬あかね, 庭野匡思, 青木輝夫, 大河原望, 谷川朋範, 的場澄人, 足立光司, 木名瀬健, 藤田耕史

    日本地球惑星科学連合大会 

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  100. Numerical simulations of precipitation in high altitude Himalaya mountainous area by using JMA-NHM.

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  101. Collaborative studies for locating the oldest ice near Dome Fuji, Antarctica.

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  102. ネパール・ヒマラヤ トラカルディン氷河における氷壁ダイナミクスの解明.

    佐藤洋太, 藤田耕史, 井上公, 砂子宗次朗, 坂井亜規子, 對馬あかね, Podolskiy EA, Berthier E, Kayastha RB

    日本地球惑星科学連合大会 

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  103. 中央アジアの2つの山岳アイスコアの硝酸安定同位体比変動.

    竹内望, 大手信人, 藤田耕史

    日本地球惑星科学連合大会 

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  104. Simulations of black carbon (BC) aerosol impact over Hindu-Kush Himalayan sites: validation, sources, and implications on glacier runoff. International conference

    Santra S, Verma S, Fujita K, Chakraborty I, Boucher O, Takemura T, Burkhart JF, Matt F, Mukesh Sharma M

    EGU General Assembly 2020 

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    Event date: 2020.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  105. Partitioning the uncertainty of ensemble projections of global glacier mass change. International conference

    Marzeion B, Hock R, Anderson B, Bliss A, Nicolas Champollion, Fujita K, Huss M, Immerzeel WW, Kraaijenbrink P, Malles JH, Maussion F, Radić V, Rounce D, Sakai A, Shannon S, van de Wal RSW, Harry Zekollari H

    EGU General Assembly 2020 

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    Event date: 2020.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  106. Pollen analysis of an ice core drilled in Pamir-Arai Mountains, Central Asia

    Ogaya Haruka, Takeuchi Nozomu, Fujita Koji, Kawamura Kenji, Tsushima Akane, Miyauchi Kenshiro, Hori Yoichiro, Aizen Vladimir, Osmonov Azamat

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2020  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2020

    Language:Japanese  

  107. Ice cliff dynamics in Trakarding Glacier in the Nepal Himalaya

    Sato Yota, Fujita Koji, Inoue Hiroshi, Sunako Sojiro, Sakai Akiko, Tsushima Akane, Podolskiy Evgeny, Berthier Etienne, Kayastha Rakesh, Kayastha Rijan

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2020  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2020

    Language:Japanese  

  108. Future glacier volume and runoff changes over Central Europe using a full energy balance-based glacier model with debris effects. International conference

    Sasaki O, Hirabayashi Y, Fujita K, Sakai A, Kanae S

    American Geophysical Union Fall Meeting 2019 

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:San Francisco, USA   Country:United States  

  109. Passing the warm periods in Holocene in Central Asia-evidences from the ice-core records. International conference

    Aizen EM, Aizen VB, Takeuchi N, Fujita K, Rodda C, Mayewski PA, Xu BQ

    American Geophysical Union Fall Meeting 2019 

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    Event date: 2019.12

    Language:English   Presentation type:Poster presentation  

    Venue:San Francisco, USA   Country:United States  

  110. Variations of concentrations and sizes of black carbon particles in Northwest Greenland over the past 350 years. International conference

    Goto-Azuma K, Ogawa-Tsukagawa Y, Kondo Y, Dallmayr R, Hirabayashi M, Ogata J, Kitamura K, Kawamura K, Motoyama M, Matoba S, Aoki T, Moteki N, Ohata S, Mori T, Koike M, Komuro Y, Tsushima A, , Nagatsuka N, Shigeyama W, Fujita K

    American Geophysical Union Fall Meeting 2019 

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:San Francisco, USA   Country:United States  

  111. The 60 years history of atmospheric sulfate formation pathways based on triple oxygen isotopic composition preserved in the SE-Dome ice core. International conference

    Hattori S, Iizuka Y, Fujita K, Uemura R, Ishino S, Oshima N, Matoba S, Suzuki N, Tsuruta A, Savarino J, Yoshida N

    American Geophysical Union Fall Meeting 2019 

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    Event date: 2019.12

    Language:English   Presentation type:Poster presentation  

    Venue:San Francisco, USA   Country:United States  

  112. Simulations of black carbon (BC) aerosol impact over Hindu-Kush Himalayan sites: validation, sources, and implications on glacier runoff. International conference

    Santra S, Verma S, Fujita K, Chakraborty I, Boucher O, Takemura T, Burkhart JF, Matt F, Sharma M

    American Geophysical Union Fall Meeting 2019 

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    Event date: 2019.12

    Language:English   Presentation type:Poster presentation  

    Venue:San Francisco, USA   Country:United States  

  113. Variations in mineralogical composition of dust present in the Greenland SIGMA-D ice core and EGRIP snow pit over the past 100 years.

    Nagatsuka N, Goto-Azuma K, Tsushima A, Motoyama H, Matoba S, Fujita K, Yamasaki T, Onuma Y, Komuro Y, Minowa M, Aoki T, Hirabayashi M, Nakazawa F, Dahl-Jensen D

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  114. Satellite-derived snow grain size over the Greenland Ice Sheet and its relationships with climate indices.

    Aoki T, Shimada R, Hori M, Niwano M, Tanikawa T, Ishimoto H, Matoba S, Iizuka Y, Fujita K

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  115. Reduced marine biogenic sulphate flux in east Antarctica during glacial periods - Based on ion chemistry records from Dome Fuji ice core -.

    Goto-Azuma K, Hirabayashi M, Motoyama H, Miyake T, Kuramoto T, Uemura R, Igarashi M, Iizuka Y, Sakurai T, Horikawa S, Suzuki K, Suzuki T, Fujita K, Kondo Y, Hattori S, Fujii Y

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  116. A paleo-environmental study in JARE Phase X - Deep ice coring in the Dome Fuji area for "Oldest Ice Core".

    Kawamura K, Abe-Ouchi A, Aoki S, Fujita K Fujita S, Fukui K, Furukawa T, Furusaki A, Goto-Azuma K, Higuchi K, Hirabayashi M, Hirasawa N, Hori A, Horiuchi K, Iizuka Y, Matoba S, Miyahara M, Motoyama H, Niwano M, Ohno H, Oyabu I, Saito F, Sugiyama S, Suzuki T, Takata M, Tsutaki S, Uchida T, Uemura R, Yamaguchi S

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  117. アルタイ山脈ベルーハ氷河コアから復元する過去100年の硝酸同位体組成変動.

    服部祥平, Lin M, 竹内望, 藤田耕史, Caillon N, Akers P, Aizen VB, Nikitin SA, 吉田尚弘, Savarino J

    地球化学会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京   Country:Japan  

  118. 中央アジアパミール山域で掘削された浅層アイスコアに含まれるダストの鉱物構成.

    竹内俊介, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, Aizen VB

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:山形   Country:Japan  

  119. アルタイ山脈ベルーハ氷河コアから復元する過去100年の硝酸同位体組成変動.

    服部祥平, Lin M, 竹内望, 藤田耕史, Caillon N, Akers P, Aizen VB, Nikitin SA, 吉田尚弘, Savarino J

    地球化学会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京   Country:Japan  

  120. グリーンランド北西部における過去350年間のブラックカーボン及びダストの季節変化及び経年変化.

    東久美子, 塚川佳美, 近藤豊, Dallmayr R, 平林幹啓, 尾形純, 北村亨太郎, 川村賢二, 本山秀明, 的場澄人, 青木輝夫, 茂木信宏, 大畑祥, 森樹大, 小池真, 小室悠紀, 對馬あかね, 永塚尚子, 繁山航, 藤田耕史

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山形   Country:Japan  

  121. アイスメモリーに対する日本雪氷コミュニティの貢献の可能性―これまでの経緯とこれからの課題と展望―.

    服部祥平, 藤田耕史, 竹内望, 飯塚芳徳, 的場澄人

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:山形   Country:Japan  

  122. グリーンランド氷床アイスコアおよび積雪ピットサンプル中の過去100年間の鉱物組成変動の解明.

    永塚尚子, 東久美子, 對馬あかね, 本山秀明, 的場澄人, 藤田耕史, 山崎哲秀, 大沼友貴彦, 小室悠紀, 箕輪昌紘, 青木輝夫,平林幹啓, 中澤文男, Dahl-Jensen D

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山形   Country:Japan  

  123. 中央アジア・パミールアライ山域で掘削したアイスコアの花粉分析.

    鋸屋遥香, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, 宮内謙史郎, 堀燿一朗, Aizen VB, Osmonov A

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山形   Country:Japan  

  124. 全球の氷河における気温変化に対する質量収支の感度.

    坂井亜規子, 藤田耕史

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山形   Country:Japan  

  125. ネパール・ヒマラヤ トラカルディン氷河における氷壁の分布特性と氷河衰退への影響.

    佐藤洋太, 藤田耕史, 井上公, 砂子宗次朗, 坂井亜規子, 對馬あかね, Podolskiy EA, Berthier E, Kayastha RB

    日本雪氷研究大会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山形   Country:Japan  

  126. Precipitation and its variability in high elevation areas of the Nepal Himalayas. International conference

    Fujinami H, Fujita K, Takahashi N, Sato T, Hirata H, Kayastha RB, Shrestha ML

    AsiaPEX Kick-off Conferece 

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    Event date: 2019.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sapporo, Japan   Country:Japan  

  127. Mass balance of Trambau Glacier, Rolwaling region, Nepal Himalaya: In-situ observations, long-term reconstruction and mass-balance sensitivity. International conference

    Fujita K, Sunako S, Sakai A, Kayastha RB

    Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting 

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    Event date: 2019.7 - 2019.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Singapore   Country:Singapore  

  128. Glacier runoff simulation under climate change by an energy balance model for individual glaciers on a Continental-scale. International conference

    Sasaki O, Fujita K, Hirabayashi Y, Kanae S

    Asia Oceania Geosciences Society (AOGS) 16th Annual Meeting 

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    Event date: 2019.7 - 2019.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Singapore   Country:Singapore  

  129. Future projection of global-scale glacier mass loss and sea level rise. International conference

    Fujita K, Sakai A

    International Union of Geodesy and Geophysics (IUGG) General Assembly 2019 

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    Event date: 2019.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Montreal, Canada   Country:Canada  

  130. Spatial distribution of ice cliff in the Trakarding glacier, Nepal Himalaya. International conference

    Sato Y, Fujita K, Inoue H, Sunako S, Sakai A, Tsushima A, Podolskiy EA, Berthier E, Kayastha RB

    International Union of Geodesy and Geophysics (IUGG) General Assembly 2019 

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    Event date: 2019.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Montreal, Canada   Country:Canada  

  131. Glacier mass loss in Mt. Xixiabangma region during 1974-2012 as revealed by multi-source DEMs. International conference

    Qiang XX, Liu SY, Jiang Z, Fujita K, Wei J, Zhang Z, Zhu Y

    International Union of Geodesy and Geophysics (IUGG) General Assembly 2019 

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    Event date: 2019.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Montreal, Canada   Country:Canada  

  132. SE-Domeアイスコアの硫酸三酸素同位体組成から復元される過去60年における大気硫酸生成反応の変遷.

    服部祥平, 飯塚芳徳, 藤田耕史, 植村立, 石野咲子, 大島長, 鈴木希実, 的場澄人, 鶴田明日香, Joel S, 吉田尚弘

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張   Country:Japan  

  133. アイスコア試料を用いたグリーンランド南東部高涵養域における気候変動に伴った氷床表面における雪質変化の評価.

    安藤卓人, 飯塚芳徳, 柴田麻衣, 的場澄人, 杉山慎, 安達聖, 山口悟, 藤田耕史, 堀彰, 青木輝夫, 藤田秀二

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張   Country:Japan  

  134. グリーンランドにおける人為起源及び自然起源のブラックカーボンの濃度、粒径分布、季節変動の経年変化.

    東久美子, 塚川佳美, 近藤豊, Dallmayr R, 平林幹啓, 尾形純, 北村亨太郎, 川村賢二, 本山秀明, 的場澄人, 青木輝夫, 茂木信宏, 大畑祥, 森樹大, 小池真, 小室悠紀, 對馬あかね, 永塚尚子, 繁山航, 藤田耕史

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張   Country:Japan  

  135. アイスコアによる過去の大気エアロゾルの復元とその変動要因. Invited

    飯塚芳徳, 植村立, 藤田耕史, 服部祥平, 関宰, 大島長, 大野浩, 的場澄人

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張   Country:Japan  

  136. ネパール・ヒマラヤ トラカルディン氷河における氷壁の分布特性.

    佐藤洋太, 藤田耕史, 井上公, 砂子宗次朗, 坂井亜規子, 對馬あかね, Podolskiy EA, Berthier E, Kayastha RB

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張   Country:Japan  

  137. 中央アジアパミール山域で掘削された浅層アイスコアのダストの鉱物構成の分析.

    竹内俊介, 竹内望, 藤田耕史, 川村賢二, 對馬 あかね, Aizen VB, Osmonov A

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張   Country:Japan  

  138. 中走査型電子顕微鏡(SEM)を用いたグリーンランドSIGMA-Dアイスコア中の過去100年間の鉱物組成変動の解明.

    永塚尚子, 東久美子, 對馬あかね, 本山秀明, 的場澄人, 藤田耕史, 山崎哲秀, 大沼友貴彦, 箕輪昌紘, 青木輝夫, 平林幹啓

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張   Country:Japan  

  139. 中央アジア・パミールアライ山域で掘削されたアイスコアの花粉分析.

    鋸屋遥香, 竹内望, 藤田耕史, 川村賢二, 對馬 あかね, Aizen VB, Osmonov A

    日本地球惑星科学連合大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:幕張   Country:Japan  

  140. Mass balance of Trambau Glacier, Rolwaling region, Nepal Himalaya: In situ observations, long-term reconstruction, and mass-balance sensitivity. International conference

    Sunako S, Fujita K, Sakai A, Kayastha RB

    EGU General Assembly 2019 

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    Event date: 2019.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna, Austria   Country:Austria  

  141. History of snow grain modification evaluated by specific surface area (SSA) and density using two ice cores from Greenland. International conference

    Ando T, Iizuka Y, Shibata M, Matoba S, Sugiyama S, Adachi S, Yamaguchi S, Fujita K, Hori A, Niwano M, Aoki T, Fujita S

    EGU General Assembly 2019 

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    Event date: 2019.4

    Language:English   Presentation type:Poster presentation  

    Venue:Vienna, Austria   Country:Austria  

  142. Annual Mass Balance Reconstruction of Rikha Samba Glacier, Nepal Himalaya between 1979 and 2017. International conference

    Gurung T, Kayastha RB, Fujita K, Sinisalo A, Joshi SP, Litt M, Kirkham J

    EGU General Assembly 2019 

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    Event date: 2019.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna, Austria   Country:Austria  

  143. Thermal fracturing on a Himalayan debris-covered glacier. International conference

    Podolskiy EA, Fujita K, Sunako S, Sato Y, Tsushima A, Kayastha RB

    EGU General Assembly 2019 

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    Event date: 2019.4

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Vienna, Austria   Country:Austria  

  144. Pollen analysis of an ice core drilled in Pamir-Arai Mountains, Central Asia

    Ogaya Haruka, Takeuchi Nozomu, Fujita Koji, Kawamura Kenji, Tsushima Akane, Miyauchi Kenshiro, Hori Yoichiro, Vladimir Aizen, Azamat Osmonov

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2019  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2019

    Language:Japanese  

  145. フィルンコア試料を用いたグリーンランド南東部高涵養域における過去60年間の気候変動に伴った雪質変化の評価

    安藤卓人, 飯塚芳徳, 柴田麻衣, 的場澄人, 杉山慎, 飯塚芳徳, 柴田麻衣, 的場澄人, 杉山慎, 安達聖, 山口悟, 藤田耕史, 堀彰, 青木輝夫, 藤田秀二

    日本地球惑星科学連合大会予稿集(Web)  2019 

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    Event date: 2019

    Language:Japanese  

  146. Mineral composition of dust layers in a shallow ice core drilled in Pamir Alay Mountains of Central Asia

    Takeuchi Shunsuke, Takeuchi Nozomu, Fujita Koji, Kawamura Kenji, Tsushima Akane, Vladimir Aizen

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2019  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2019

    Language:Japanese  

  147. 中央アジアパミール山域で掘削された浅層アイスコアのダストの鉱物構成の分析

    竹内俊介, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, AIZEN Vladimir

    日本地球惑星科学連合大会予稿集(Web)  2019 

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    Event date: 2019

  148. 中央アジア・パミールアライ山域で掘削されたアイスコアの花粉分析

    鋸屋遥香, 竹内望, 藤田耕史, 川村賢二, 對馬あかね, AIZEN Vladimir, OSMONOV Azamat

    日本地球惑星科学連合大会予稿集(Web)  2019 

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    Event date: 2019

  149. グリーンランドにおける人為起源及び自然起源のブラックカーボンの濃度,粒径分布,季節変動の経年変化

    東久美子, 東久美子, 塚川佳美, 近藤豊, DALLMAYR Remi, DALLMAYR Remi, 平林幹啓, 尾形純, 北村享太郎, 川村賢二, 川村賢二, 本山秀明, 本山秀明, 的場澄人, 青木輝夫, 茂木信宏, 大畑祥, 森樹大, 小池真, 小室悠紀, 對馬あかね, 對馬あかね, 永塚尚子, 繁山航, 繁山航, 藤田耕史

    日本地球惑星科学連合大会予稿集(Web)  2019 

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    Event date: 2019

  150. Seasonal variations and temporal trends of black carbon and dust in northwest Greenland over the past 350 years

    Goto-Azuma Kumiko, Matoba Sumito, Aoki Teruo, Moteki Nobuhiro, Ohata Sho, Mori Tatshuhiro, Koike Makoto, Komuro Yuki, Tsushima Akane, Nagatsuka Naoko, Shiegmaya Wataru, Ogawa-Tsukagawa Yoshimi, Fujita Koji, Kondo Yutaka, Remi Dallmayr, Hirabayashi Motohiro, Ogata Jun, Kitamura Kyotaro, Kawamura Kenji, Motoyama Hideaki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2019  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2019

    Language:Japanese  

  151. Spatial distribution of ice cliff and its impact on shrinking Trakarding Glacier In the Nepal Himalaya

    Sato Yota, Fujita Koji, Inoue Hiroshi, Sunako Sojiro, Sasaki Akiko, Tsushima Akane, Evgeny Podolskiy, Etienne Berthier, Kayastha Etienne Berthier Rijan

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2019  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2019

    Language:Japanese  

  152. DEVELOPMENT AND VALIDATION OF A LARGE-SCALE GLACIER MODEL BASED ON AN ENERGY BALANCE APPROACH OVER CENTRAL EUROPE

    佐々木織江, 藤田耕史, 坂井亜規子, 平林由希子, 鼎信次郎

    土木学会論文集 B1(水工学)(Web)  2019 

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    Event date: 2019

  153. 中央ヨーロッパを対象とした熱収支氷河モデルによる氷河流出量の将来予測

    佐々木織江, 藤田耕史, 平林由希子, 鼎信次郎

    水文・水資源学会研究発表会要旨集(Web)  2019 

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    Event date: 2019

  154. Climate Conditions of the Northern Japanese Alps as a Region where Glaciers are Distributed

    福井幸太郎, 飯田肇, 藤田耕史

    雪氷研究大会講演要旨集(Web)  2018 

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    Event date: 2018

  155. Studies on the snow avalanche dynamics by the full-scale experiments in Niseko − Avalanches artificially and naturally released in winter 2018 –

    Ito Yoichi, Honda Ryo, Fujita Koji, Sunako Sojiro, Niiya Hirofumi, Tsuji Hiroki, Mori Shoichi, Fujita Kazuyuki, Shinya Akio, Nishimura Kouichi, Saito Yoshihiko, Imai Toshiaki, Horikawa Shinichiro, Guillén Cristina Pérez, Issler Dieter, Thomas Fischer Jan, Tsunematsu Kae

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2018  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2018

    Language:Japanese  

  156. Pollen analysis of an ice core drilled in Pamir-Arai Mountains, Central Asia in 2016

    Ogaya Haruka, Takeuchi Nozomu, Fujita Koji, Kawamura Kenji, Tsushima Akane, Miyauchi Kenshiro, Hori Yoichiro, Aizen Vladimir, Osmonov Azamat

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2018  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2018

    Language:Japanese  

  157. High-resolution analysis of black carbon in an ice core drilled at Northwest Greenland

    Goto-Azuma Kumiko, Matoba Sumito, Kadota Moe, Aoki Teruo, Moteki Nobuhiro, Ohata Sho, Mori Tatshuhiro, Koike Makoto, Komuro Yuki, Tsushima Akane, Nagatsuka Naoko, Ogawa-Tsukagawa Yoshimi, Fujita Koji, Kondo Yutaka, Dallmayr Remi, Hirabayashi Motohiro, Ogata Jun, Kitamura Kyotaro, Kawamura Kenji, Motoyama Hideaki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2018  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2018

    Language:Japanese  

  158. グリーンランド南東ドームアイスコアの近赤外反射率測定

    柴田麻衣, 山口悟, 藤田耕史, 安達聖, 安藤卓人, 藤田秀二, 堀彰, 青木輝夫, 飯塚芳徳

    日本地球惑星科学連合大会予稿集(Web)  2018 

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    Event date: 2018

    Language:Japanese  

  159. Spatial distribution of ice cliff in the Trambau Glacier, Nepal Himalaya

    Sato Yota, Fujita Koji, Inoue Hiroshi, Tsushima Akane, Sunako Sojiro, Sakai Akiko, Abe Takahiro, Kayastha Rijan B.

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2018  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2018

    Language:Japanese  

  160. Past 60 years changes in oxidation pathways of tropospheric sulfur from triple oxygen isotopic composition of sulfate preserved in SE-Dome ice core

    Hattori Shohei, Iizuka Yoshinori, Uemura Ryu, Suzuki Nozomi, Tsuruta Asuka, Ishino Sakiko, Fujita Koji, Matoba Sumito, Yoshida Naohiro

    Abstracts of Annual Meeting of the Geochemical Society of Japan  2018  GEOCHEMICAL SOCIETY OF JAPAN

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    Event date: 2018

    Language:Japanese  

  161. Characteristics of mass balance on debris-free area of Trambau glacier, Nepal Himalaya

    Sunako Sojiro, Fujita Koji, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2018  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2018

    Language:Japanese  

  162. グリーンランド氷床における極域気候モデルNHM‐SMAPの2m気温再現精度

    庭野匡思, 青木輝夫, 青木輝夫, 橋本明弘, 的場澄人, 山口悟, 谷川朋範, 藤田耕史, 對馬あかね, 飯塚芳徳, 島田利元, 堀雅裕

    日本気象学会大会講演予稿集  2017.9.30 

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    Event date: 2017.9

    Language:Japanese  

  163. Performance of the polar regional climate model NHM-SMAP applied in Greenland Ice Sheet

    庭野匡思, 青木輝夫, 青木輝夫, 橋本明弘, 的場澄人, 山口悟, 谷川朋範, 藤田耕史, 對馬あかね, 飯塚芳徳, 島田利元, 堀雅裕

    雪氷研究大会講演要旨集(Web)  2017 

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    Event date: 2017

    Language:Japanese  

  164. 東南極における表層積雪の同位体分布とその形成要因

    栗田直幸, 赤田尚史, 藤田耕史, 本山秀明

    極域科学シンポジウム(Web)  2017 

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    Event date: 2017

    Language:Japanese  

  165. ROCK GLACIERS IN THE BHUTAN HIMALAYAS

    福井幸太郎, 藤田耕史, TSHERING Phuntsho, 古屋正人

    雪氷研究大会講演要旨集(Web)  2017 

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    Event date: 2017

  166. Variations in mineralogy of dust in ice core obtained from Northwestern Greenland Ice Sheet

    Nagatsuka Naoko, Goto-Azuma Kumiko, Tsushima Akane, Motoyama Hideaki, Matoba Sumito, Fujita Koji, Yamasaki Tetsuhide, Onuma Yukihiko, Minowa Masahiro, Aoki Teruo

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2017  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2017

    Language:Japanese  

  167. Seasonal scale dating of a shallow ice core from Greenland using oxygen isotope matching between data and simulation

    Furukawa Ryoto, Uemura Ryu, Fujita Koji, Sjolte Jesper, Yoshimura Kei, Matoba Sumito, Iizuka Yoshinori

    Abstracts of Annual Meeting of the Geochemical Society of Japan  2017  GEOCHEMICAL SOCIETY OF JAPAN

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    Event date: 2017

    Language:Japanese  

    <p></p>

  168. Thermal properties evaluation of debris-covered area at the Trambau glacier, Nepal

    Sunako Sojiro, Fujita Koji, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2017  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2017

    Language:Japanese  

  169. 2016年中央アジア・パミール山域レーニン峰アイスコア掘削報告

    竹内望, 藤田耕史, 川村賢二, 對馬あかね, 宮内謙史郎, 堀燿一朗, AIZEN Vladimir, OSMONOV Azamat

    日本地球惑星科学連合大会予稿集(Web)  2017 

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    Event date: 2017

  170. The past 60 years variations of sources and formation pathways of nitrate preserved in SE-Dome site, southeastern Greenland Ice Sheet

    Tsuruta Asuka, Hattori Shohei, Iizuka Yoshinori, Fujita Koji, Uemura Ryu, Matoba Sumito, Yoshida Naohiro

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2017  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2017

    Language:Japanese  

  171. The past 60 years variation of nitrogen isotopic composition of nitrate preserved in SE-Dome site, southeastern Greenland Ice Sheet

    Tsuruta Asuka, Hattori Shohei, Iizuka Yoshinori, Fujita Koji, Uemura Ryu, Matoba Sumito, Yoshida Naohiro

    Abstracts of Annual Meeting of the Geochemical Society of Japan  2017  GEOCHEMICAL SOCIETY OF JAPAN

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    Event date: 2017

    Language:Japanese  

    <p></p>

  172. Understanding variation trend of δ<sup>17</sup>O and <sup>17</sup>O-excess in an ice core drilled at the SIGMA-D site

    Tsushima Akane, Gkinis Vasileios, Goto-Azuma Kumiko, Matoba Sumito, Nagatsuka Naoko, Motoyama Hideaki, Fujita Koji, Aoki Teruo

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2017  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2017

    Language:Japanese  

  173. Elevation changes of glaciers revealed by SfM-digital elevation models in the Khumbu region, Nepal Himalaya, from the 1970s to 2016

    Ota Kohzaburo, Sunako Sojiro, Sakai Akiko, Ohmori Koichiroi, Fujita Koji

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2017  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2017

    Language:Japanese  

  174. 極域領域気候モデルNHM‐SMAPの初期評価結果

    庭野匡思, 青木輝夫, 青木輝夫, 橋本明弘, 谷川朋範, 保坂征宏, 堀雅裕, 的場澄人, 山口悟, 藤田耕史, 本山秀明

    日本気象学会大会講演予稿集  2016.9.30 

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    Event date: 2016.9

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  175. グリーンランド氷床上SIGMA‐Aサイトにおける放射収支観測―近赤外アルベドと気温の関係―

    青木輝夫, 青木輝夫, 庭野匡思, 谷川朋範, 的場澄人, 山口悟, 山崎哲秀, 藤田耕史, 本山秀明, 堀雅裕

    日本気象学会大会講演予稿集  2016.9.30 

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    Event date: 2016.9

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  176. The next deep ice coring in the Dome Fuji region, East Antarctica

    Kawamura Kenji, Iizuka Y., Uemura R., Uchida T., Oono H., Kameda T., Suzuki T., Takata M., Hirabayashi M., Fujita K., Fukui K., Motoyama H., Hori A., Horiuchi K., Matoba S., Miyamoto A., Goto-Azuma K., Fujita S., Furukawa T., Nakazawa F., Aoki S., Azuma N., Abe-Ouchi A.

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  177. Initial evaluation of the NHM-SMAP regional climate model in the Greenland ice sheet during 2012

    庭野匡思, 青木輝夫, 青木輝夫, 橋本明弘, 谷川朋範, 保坂征宏, 堀雅裕, 島田利元, 的場澄人, 山口悟, 藤田耕史, 本山秀明

    雪氷研究大会講演要旨集(Web)  2016 

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    Event date: 2016

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  178. Hearing investigation of the 2015 Langtang avalanche in Nepal with Langtang villagers

    山口悟, 貞兼綾子, 西村浩一, 藤田耕史

    雪氷研究大会講演要旨集(Web)  2016 

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    Event date: 2016

    Language:Japanese  

  179. Relationship between Snow Depth and Extent of Damage by Snow Avalanche in Langtang induced by the 2015 Gorkha Earthquake

    伊藤陽一, 西村浩一, 藤田耕史, 山口悟, 和泉薫, 河島克久, 上石勲

    雪氷研究大会講演要旨集(Web)  2016 

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    Event date: 2016

    Language:Japanese  

  180. Temperature-NIR albedo relationship measured at SIGMA-A on Greenland ice sheet

    青木輝夫, 青木輝夫, 庭野匡思, 谷川朋範, 的場澄人, 山口悟, 山崎哲秀, 藤田耕史, 本山秀明, 堀雅裕

    雪氷研究大会講演要旨集(Web)  2016 

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    Event date: 2016

    Language:Japanese  

  181. グリーンランド氷床上の気温上昇による近赤外アルベド低下が表面融解に与える正のフィードバック効果

    青木輝夫, 青木輝夫, 庭野匡思, 谷川朋範, 的場澄人, 山口悟, 山崎哲秀, 藤田耕史, 本山秀明, 堀雅裕, 島田利元

    極域科学シンポジウム(Web)  2016 

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    Event date: 2016

    Language:Japanese  

  182. Temperature-NIR albedo relationship measured at SIGMA—A on Greenland ice sheet

    Aoki Teruo, Niwano Masashi, Tanikawa Tomonori, Matoba Sumito, Yamaguchi Satoru, Yamasaki Tetsuhide, Fujita Koji, Motoyama Hideaki, Hori Masahiro

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  183. Potential of Fixed-wing UAV for Himalayan Glaciological Research

    Inoue Hiroshi, Fujita Koji, Sunako Sojiro

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  184. Spatial distribution of thermal resistance and regional analysis in the Himalayas and the Karakoram

    Sunako Sojiro, Fujita Koji, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  185. Quality assessment of DEMs based on UAV-SfM in Langtang valley, Nepal

    Sunako Sojiro, Fujita Koji, Inoue Hiroshi, Izumi Takeki, Immerzeel Walter W.

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  186. Surface elevation change of Trambau Glacier in Nepal Himalaya from 1980 to 2015

    Morimoto Naoya, Shin Shin, Fujita Koji, Sakai Akiko, Sunako Sojiro

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2016  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2016

    Language:Japanese  

  187. MultiplefrequencyGPR soundings onthe glaciers and the perennial snow patches in Japan

    福井幸太郎, 飯田肇, 藤田耕史, 砂子宗次朗

    雪氷研究大会講演要旨集(Web)  2015 

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    Event date: 2015

  188. A303 北西グリーンランドSIGMA-A・Bサイトにおける気象条件の年々変動(気象システムI,一般口頭発表)

    庭野 匡思, 青木 輝夫, 的場 澄人, 山口 悟, 藤田 耕史, 谷川 朋範, 對馬 あかね, 朽木 勝幸, 本山 秀明

    大会講演予講集  2015  日本気象学会

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    Event date: 2015

    Language:Japanese  

  189. Surface elevation change on Trambau Glacier, Nepal Himalaya, based on ALOS PRISM image analysis

    Morimoto Naoya, Sugiyama Shin, Fujita Koji

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  190. Evaluation of glacier surface elevation change in East Himalaya using ICESat laser altimeter

    Nuimura Takayuki, Fujita Koji, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  191. Analysis of the total concentration of metals in the Greenland, SIGMA-D shallow ice core

    Komuro Yuki, Suzuki Toshitaka, Onuma Yukihiko, Minowa Masahiro, Yamasaki Tetsuhide, Matoba Sumito, Fujita Koji, Hirabayashi Motohiro, Motoyama Hideaki, Aoki Teruo

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  192. Spatial accumulation rate and major chemical components in Dome Fuji, Antarctica

    Hoshina Yu, Fujita Koji, Motoyama Hideaki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  193. Spatial distribution of debris thickness Using thermal resistance at Khumbu glacier, Nepal

    Sunako Sojiro, Fujita Koji, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  194. Reconstruction of climate during the past 157years by analyzing an ice core obtained from Northwestern Greenland Ice Sheet (SIGMA-D)

    Kadota Moe, Matoba Sumito, Motoyama Hideaki, Fujita Koji, Yamasaki Tetsuhide, Onuma Yukihiko, Minowa Masahiro, Komuro Yuki, Aoki Teruo

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2015  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2015

    Language:Japanese  

  195. 積雪粒径測定手法の比較

    青木輝夫, 山口悟, 本吉弘岐, 朽木勝幸, 庭野匡思, 藤田耕史, 的場澄人, 八久保晶弘, 谷川朋範, 堀雅裕, 竹内由香里, 杉浦幸之助

    雪氷研究大会講演要旨集  2014.9.5 

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    Event date: 2014.9

    Language:Japanese  

  196. グリーンランド北西氷床のアイスコア掘削について―SIGMA‐D経過報告―

    本山秀明, 的場澄人, 藤田耕史, 山崎哲秀, 大沼友貴彦, 箕輪昌紘, 小室悠紀, 山口悟, 青木輝夫

    雪氷研究大会講演要旨集  2014.9.5 

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    Event date: 2014.9

    Language:Japanese  

  197. 2014年秋に実施したブータン・ヒマラヤでの小型氷河と山岳永久凍土観測

    福井幸太郎, 藤田耕史, TSHERING Phuntsho

    極域科学シンポジウム講演予稿集(CD-ROM)  2014 

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    Event date: 2014

  198. 積雪温度勾配下における水蒸気移動とそれに伴う水安定同位体変化

    保科優, 山口悟, 藤田耕史, 佐藤篤司, 的場澄人, 本山秀明

    雪氷研究大会講演要旨集  2013.9.5 

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    Event date: 2013.9

    Language:Japanese  

  199. 南極ドームふじコアの化学成分が示す過去70万年の環境変動

    東久美子, 平林幹啓, 本山秀明, 三宅隆之, 倉元隆之, 植村立, 川村賢二, PARRENIN Frederic, 鈴木香寿恵, 飯塚芳徳, 鈴木啓助, 五十嵐誠, 藤井理行, 鈴木利孝, 堀川信一郎, 河野美香, 藤田耕史, 櫻井俊光, 小端拓郎

    極域科学シンポジウム講演予稿集(CD-ROM)  2013 

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    Event date: 2013

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  200. Analysis of long-term trend (1952-2011) in glacier runoff and its contribution to river runoff in a highly debris-covered glacierized catchment, southeastern Tibetan Plateau

    Zhang Yong, Hirabayashi Yukiko, Liu Qiao, Fujita koji

    Proceeding of Annual Conference  2013  THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES

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    Event date: 2013

    Language:Japanese  

    Glacier plays an important role in streamflow regimes of mountainous drainage basins and is a vital source of runoff in the summer months (Kaser et al., 2010). Even a basin where glacier fraction is less than 0.5% can provide a significant contribution from glacial meltwater to summer runoff. Glaciers have generally experienced retreat and thinning since the beginning of the 20th century (IPCC, 2007). The continued glacier shrinkage due to the ongoing effects of global climate change has raised concerns about the role of the glaciers as a source of freshwater, because these impacts affect not only the local catchment area but also adjacent lowlands far beyond the limits of the glacierized mountain ranges. Hence, there is a need for analyzing the long-term trend in glacier runoff variability and its impact on river runoff for regional water supplies.

  201. 南極ドームふじ氷床コアによる過去70万年の陸域起源物質変動の復元

    三宅隆之, 藤井理行, 平林幹啓, 東久美子, 植村立, 植村立, 倉元隆之, 倉元隆之, 本山秀明, 藤田耕史, 堀川信一郎, 飯塚芳徳, 五十嵐誠, 河野美香, 鈴木啓助, 鈴木利孝

    極域科学シンポジウム講演予稿集(CD-ROM)  2013 

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    Event date: 2013

  202. 南極内陸における積雪表層の主要化学成分

    保科優, 藤田耕史, 中澤文男, 飯塚芳徳, 三宅隆之, 平林啓幹, 倉元隆之, 本山秀明, 藤田秀二

    雪氷研究大会講演要旨集  2013 

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    Event date: 2013

  203. 酸素・水素安定同位体比を用いた南極ドームふじ氷床コアにおける過去72万年の気温復元

    植村立, 植村立, 本山秀明, MASSON-DELMOTTE V., JOUZEL J., 三宅隆之, 平林幹啓, 倉元隆之, 大野浩, 河野美香, 東久美子, 藤井理行, 藤田耕史, 堀川信一郎, 飯塚芳徳, 五十嵐誠, 鈴木啓助, 鈴木利孝

    極域科学シンポジウム講演予稿集(CD-ROM)  2013 

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    Event date: 2013

  204. 室内実験による積雪温度勾配による水蒸気移動とそれに伴う水安定同位体比変化

    保科優, 藤田耕史, 山口悟, 佐藤篤司, 本山秀明

    雪氷研究大会講演要旨集  2012.9.10 

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    Event date: 2012.9

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  205. ブータンヒマラヤにおける氷河・氷河湖相互作用

    津滝俊, 藤田耕史, 山口悟, 坂井亜規子, 縫村崇行, 杉山慎, 小森次郎, 竹中修平, TSHERING Phuntsho

    雪氷研究大会講演要旨集  2012.9.10 

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    Event date: 2012.9

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  206. 363 DNA analysis for identification of a Pinus pollen grain at subsection level from the Belukha glacier, Altai Mountains, Russia

    Nakazawa Fumio, Suyama Yoshihisa, Takeuchi Nozomu, Fujita Koji, Imura Satoshi, Kanda Hiroshi, Motoyama Hideaki

    2012.8.23  Palynological Society of Japan

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    Event date: 2012.8

    Language:English  

  207. Variations in pollen grains in a shallow ice core drilled from Fedchanko Glacier in Pamir, Central Asia

    Miyairi Masaya, Takeuchi Nozomu, Fujita Koji, Matoba Sumito, Okamoto Sachiko, Bodinton Dylan, Podolskiy Evgeny, Aizen Vladimir

    JSSI & JSSE Joint Conference  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  208. Potential of long-distance transport of pollen derived by DNA analysis of a Pinus pollen grain found in Belukha Glacier, Altain Mountains, Russia

    Nakazawa Fumio, Suyama Yoshihisa, Takeuchi Nozomu, Fujita Koji, Imura Satoshi, Motoyama Hideaki

    JSSI & JSSE Joint Conference  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  209. Database of altitudinal distribution of mountain glacier in high Asian mountains

    Nuimura Takayuki, Sakai Akiko, Fujita Koji, Nagai Hiroto, Taniguchi Keisuke, Tsutaki Shun, Okamoto Sachiko, Hoshina Yu, Kozawa Aki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  210. Dissolved Chemical Ions in an Ice Core of Grigoriev Ice Cap, Kyrgyz Tien Shan

    Amemiya Shun, Takeuchi Nozomu, Sera Shuntarou, Fujita Koji, Okamoto Sachiko, Naoki Kazuhiro, Aizen Vladimir

    JSSI & JSSE Joint Conference  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  211. Snow algae in an ice core drilled on Grigoriev Ice cap in the Kyrgyz Tien Shen Mountains

    Honda Megumi, Takeuchi Nozomu, Sera Syuntaro, Fujita Koji, Okamoto Sachiko, Naoki Kazuhiro, Aizen Vladimr

    JSSI & JSSE Joint Conference  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  212. Trace element analyses in a Gregoriev ice core Kyrgyz Tien Shan for the period 1800-2007AD:Change of dust composition and source

    Murakami Kosei, Fujita Koji, Takeuchi Nozomu, Nakano Takanori, Shin Kicheol, Aizen Vladimir

    JSSI & JSSE Joint Conference  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  213. Trace element analyses in a Gregoriev ice core Kyrgyz Tien Shan for the period 1800-2007AD

    Murakami Kosei, Fujita Koji, Takeuchi Nozomu, Nakano Takanori, Shin Kicheol, Aizen Vladimir

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  214. Elevation changes in Lirung Glacier in Langtang valley, Nepal Himalaya by field measurements and remote sensing

    Nuimura Takayuki, Fujita Koji, Okamoto Sachiko, Takenaka Shuhei, Hoshina Yu, Nagai Hiroto

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  215. Post-depositional change of water stable isotope and major ion concentration by snow accumulation environment in inland Antarctica

    Hoshina Yu, Fujita Koji, Nakazawa Fumio, Iizuka Yoshinori, Miyake Takayuki, Hirabayashi Motohiro, Kuramoto Takayuki, Motoyama Hideaki, Fujita Shuji

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  216. Glacier runoff and its effect in a highly glacierized catchment, southeastern Tibetan Plateau

    Zhang Yong, Hirabayashi Yukiko, Liu Qiao, Fujita Koji

    Proceeding of Annual Conference  2012  THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES

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    Event date: 2012

    Language:Japanese  

  217. Glacier inventory in the Bhutan Himalaya

    Nagai Hiroto, Fujita Koji, Nuimura Takayuki, Sakai Akiko

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  218. Variations in discharge from the Qilian Mountains, northwest China, and its effect on the agricultural communities of the Heihe Basin, over the last two millennia

    Sakai Akiko, Inoue Mitsuyosi, Fujita Koji, Narama Chiyuki, Kubota Jumpei, Nakawo Masayoshi, Yao Tandong

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2012  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2012

    Language:Japanese  

  219. デブリ氷河の表面傾斜の支配要因に関する研究

    山口悟, 坂井亜規子, 藤田耕史

    雪氷研究大会講演要旨集  2011.9.1 

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    Event date: 2011.9

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  220. Water stable isotope of near surface snow and environment of snow accumulation rate in inland Antarctica

    Y. Hoshina, Koji Fujita, Fumio Nakazawa, Motohiro Hirabayashi, Takayuki Kuramoto, Hideaki Motoyama, Shuji Fujita, Yoshinori Iizuka, Takayuki Miyake

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011.1.1 

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    Event date: 2011.1

  221. Formation condition of debris-covered glaciers in the Bhutan Himalaya derived by satellite data

    Hiroto Nagai, Koji Fujita, Takayuki Nuimura

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011 

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    Event date: 2011

    Language:English  

  222. The use of DNA analysis in sectional identification of a Pinus pollen grain found in Belukha Glacier, Altain Mountains, Russia

    Nakazawa Fumio, Uetake Jun, Suyama Yoshihisa, Kaneko Ryou, Takeuchi Nozomu, Fujita Koji, Motoyama Hideaki, Kanda Hiroshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2011

    Language:Japanese  

  223. 多時期のDEMを用いた標高値の時系列変化の推定手法-ヒマラヤの氷河表面の高度変化の事例-

    縫村崇行, 藤田耕史, 山口悟, シャルマ R リシ

    日本写真測量学会学術講演会発表論文集  2011 

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    Event date: 2011

  224. Measurement of crystal size in Belukha ice core, Siberian Altai

    Okamoto Sachiko, Fujita Koji, Narita Hideki, Uetake Jun, Takeuchi Nozomu, Miyake Takayuki, Nakazawa Fumio, Aizen V. B, Nikitin S. A, Nakawo Masayoshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2011

    Language:Japanese  

  225. ドームふじおよびEPICA DMLの2つの深層掘削地点を含む東南極ドロンニングモードランドでの雪の堆積の時系列変化

    藤田秀二, HOLMLUND P., ANDERSSON I., BROWN I., 榎本浩之, 榎本浩之, 藤井理行, 藤田耕史, 福井幸太郎, 福井幸太郎, 古川晶雄, HANSSON M., 原圭一郎, 保科優, 五十嵐誠, 飯塚芳徳, 伊村智, INGVANDER S., KARLIN T., 本山秀明, 中澤文男, OERTER H., SJOEBERG L.E, 杉山慎, SURDYK S., STROEM J., 植村立, WILHELMS F.

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)  2011 

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    Event date: 2011

  226. ドームふじ表層4mの詳細物理層位-氷床コアシグナル形成過程理解の深化を目指して-

    藤田秀二, 榎本浩之, 榎本浩之, 福井幸太郎, 福井幸太郎, 藤田耕史, 保科優, 飯塚芳徳, 中澤文男, 杉山慎

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)  2011 

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    Event date: 2011

  227. Stable Isotopes and Chemical Composition of a shallow ice core of the Fedchenko Glacier, Pamirs

    Amemiya Shun, Takeuchi Nozomu, Fujita Koji, Matoba Sumito, Okamoto Sachiko, Evgeny Podolskiy, Dylan Bodington, Aizen Vladimir

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2011

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  228. Development of glacial lake inventory in Bhutan using "Daichi" (ALOS)

    Takeo Tadono, Masanobu Shimada, Tsutomu Yamanokuchi, Jinro Ukita, Chiyuki Narama, Nobuhiro Tomiyama, Sachi Kawamoto, Koji Fujita, Kouichi Nishimura

    International Geoscience and Remote Sensing Symposium (IGARSS)  2011 

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    Event date: 2011

    Language:English  

    The objective of this study is to develop new glacial lake inventory to understand existing condition using the optical imageries of the Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM) and the Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2) onboard the Advanced Land Observing Satellite (ALOS, nicknamed "Daichi"). Glacial lakes can be caused outburst flood when natural dams terminated by moraines are broken, and it represents serious hazard damage in downstream regions. Problems of glacial lake outburst floods (GLOFs) are that anyone does not know when it will occur and how much damage causes by it. To contribute these problems, new glacial lake inventory is currently developing in the Bhutan Himalayan using ALOS imageries. This paper describes procedure of the inventory development including image processing that introduces pan-sharpened and ortho-rectified images by PRISM and AVNIR-2, glacial lakes extraction, and its validation. © 2011 IEEE.

  229. Introduction of Glacier Area Mapping for Discharge in Asian Mountains Project

    Akiko Sakai, Takayuki Nuimura, Hiroto Nagai, Koji Fujita

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011 

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    Event date: 2011

    Language:English  

  230. Spatial and temporal variability of snow accumulation in Dronning Maud Land, East Antarctica, including two deep ice coring sites at Dome Fuji and EPICA DML

    Shuji Fujita, P. Holmlund, I. Andersson, I. Brown, H. Enomoto, Y. Fujii, K. Fujita, K. Fukui, T. Furukawa, M. Hansson, K. Hara, Y. Hoshina, M. Igarashi, Y. Iizuka, S. Imura, S. Ingvander, T. Kameda, T. Karlin, H. Motoyama, F. Nakazawa, H. Oerter, L. Sjöberg, S. Sugiyama, S. Surdyk, J. Ström, R. Uemura, F. Wilhelms

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2011 

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    Event date: 2011

    Language:English  

    To form a clearer understanding of the spatio-temporal variability of the glaciological environment in Dronning Maud Land (DML), East Antarctica, glaciological investigations were carried out along the 2800-km-long Japanese-Swedish IPY 2007/2008 traverse. The traverse route covers ice sheet ridges and two deep ice coring sites at Dome Fuji and EPICA DML. The surface mass balance (SMB) distribution was derived based on analysis of isochrones within snow pit samples, fim core samples and subsurface radar signals. The SMB averaged over various time scales in the Holocene was determined. This was then compared with various data such as surface elevation, surface slope, prevailing windfield, ice thickness, polarization ratio of satellite-based microwave emissivity and normal backscattered strength of VHF radio waves from within the ice. We find that the large-scale distribution of the SMB depends on the surface elevation, continentality and interactions between ice sheet ridges and the prevailing counterclockwise windfield in DML. A different SMB is found for the windward and leeward sides of the ridges. Local-scale variability in the SMB is essentially governed by bedrock topography which determines the local surface topography and the probability of snow deposition. In the eastern part of DML, the accumulation rate in the second half of the 20th century is found to be higher by ~15% compared to averages over longer periods of 722 a or 7.9 ka before AD 2008. A similar trend has been reported for many inland plateau sites in East Antarctica. © 2011, The Japanese Society of Snow and Ice / Japan Society for Snow Engineering. All rights reserved.

  231. 南極内陸における表面積雪の水安定同位体比と積雪堆積環境

    保科優, 藤田耕史, 中澤文男, 飯塚芳徳, 三宅隆之, 平林幹啓, 倉元隆之, 本山秀明, 藤田秀二

    雪氷研究大会講演要旨集  2011 

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    Event date: 2011

  232. 南極ドームふじ氷床コアによる過去72万年の氷期サイクルスケールのダストフラックス変動

    三宅隆之, 三宅隆之, 藤井理行, 平林幹啓, 植村立, 倉元隆之, 東久美子, 本山秀明, 藤田耕史, 堀川信一郎, 飯塚芳徳, 五十嵐誠, 河野美香, 河野美香, 鈴木啓助, 鈴木利孝

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)  2011 

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  233. 南極ドームふじ氷床コアにおける過去72万年の酸素・水素安定同位体比の変動

    植村立, 植村立, 本山秀明, MASSON-DELMOTTE V., JOUZEL J., 三宅隆之, 三宅隆之, 平林幹啓, 倉元隆之, 河野美香, 河野美香, 東久美子, 藤井理行, 藤田耕史, 堀川信一郎, 飯塚芳徳, 五十嵐誠, 鈴木啓助, 鈴木利孝

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)  2011 

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    Event date: 2011

  234. アジアの氷河・氷河湖と温暖化.

    藤田耕史

    統合された地球温暖化観測を目指して-雪氷圏における観測の最前線-(地球観測連携拠点(温暖化分野)平成21年度ワークショップ) 

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    Event date: 2010.1

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  235. Glacial-interglacial scale variability of dust flux during the past 720,000 years reconstructed from the Dome Fuji ice core, Antarctica

    Takayuki Miyake, Yoshiyuki Fujii, Motohiro Hirabayashi, Ryu Uemura, Takayuki Kuramoto, Kumiko Goto-Azuma, Hideaki Motoyama, Makoto Igarashi, Mika Kohno, Ryu Uemura, Koji Fujita, Shinichiro Horikawa, Yoshinori Iizuka, Mika Kohno, Keisuke Suzuki, Toshitaka Suzuki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010.1.1 

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    Event date: 2010.1

  236. Water stable isotopes and major ion concentrations of near-surface snow at the inland Antarctica

    Yu Hoshina, Koji Fujita, Fumio Nakazawa, Takayuki Miyake, Motohiro Hirabayashi, Takayuki Kuramoto, Hideaki Motoyama, Yoshinori Iizuka

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010.1.1 

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    Event date: 2010.1

  237. Formation condition of debris-covered glaciers in the Bhutan Himalaya derived by satellite data

    Hiroto Nagai, Koji Fujita, Takayuki Nuimura

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010 

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    Event date: 2010

    Language:English  

  238. DNA analysis of a single Pinus pollen grain in a glacier (Part 2)

    Nakazawa Fumio, Uetake Jun, Suyama Yoshihisa, Kaneko Ryou, Takeuchi Nozomu, Fujita Koji, Motoyama Hideaki, Kanda Hiroshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2010

    Language:Japanese  

  239. 東南極の2箇所の氷床コア深層掘削点であるEPICA-DMLとドームふじの間の地域の雪氷環境の空間的分布

    藤田秀二, HOLMLUND P., ANDERSSON I., BROWN I., 榎本浩之, 藤井理行, 藤田耕史, 福井幸太郎, 古川晶雄, HANSSON M., 原圭一郎, 飯塚芳徳, 伊村智, INGVANDER S., KARLIN T., 本山秀明, 中澤文男, SJOEBERG L., 杉山慎, SURDYK S., STROEM J.

    極域科学・宙空圏・気水圏・生物・地学シンポジウム講演予稿集(CD-ROM)  2010 

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    Event date: 2010

  240. Reconstructed summer temperature in Belukha ice core and neighbor glacier changes

    Okamoto Sachiko, Fujita Koji, Narita Hideki, Uetake Jun, Takeuchi Nozomu, Miyake Takayuki, Nakazawa Fumio, Aizen Vladimir, Nikitin Stanislav, Nakawo Masayoshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2010

    Language:Japanese  

  241. Ice thickness survey at Yala Glacier, Nepal Himalaya, in 2009

    Tone, K, S. Sugiyama, K. Fukui, K. Fujita

    Glaciology in Hokkaido  2010 

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    Event date: 2010

  242. ネパールヒマラヤ・ヤラ氷河の氷厚および流動速度測定

    刀根賢太, 杉山慎, 福井幸太郎, 藤田耕史

    雪氷研究大会講演要旨集  2010 

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    Event date: 2010

  243. Ice core drilling on the Fedchenko Glacier in Pamir, 2009

    Takeuchi Nozomu, Fujita Koji, Matoba Sumito, Okamoto Sachiko, Podolskiy Evgeny, Bodington Dylan, Aizen Vladimir

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2010

    Language:Japanese  

  244. Altitudinal distribution of glacier area in the Ili basin

    Akiko Sakai, Koji Fujita, Chiyuki Narama, Jumpei Kubota

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010 

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    Event date: 2010

    Language:English  

  245. Analysis and dating of the ice core of the Grigoriev ice cap in tien shan, Kirghiz

    Sera Shuntaro, Takeuchi Nozomu, Fujita kouji, Okamoto Sachiko, Naoki Kazuhiro, Aizen Vladimr

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2010

    Language:Japanese  

  246. Re-evaluation of potential of glacial lake outburst flood in the Himalayas – Evaluation with pre-GLOF lakes –

    K. Fujita, A. Sakai, A. B. Surazakov, T. Yamanokuchi, S. Takenaka

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010 

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    Event date: 2010

    Language:English  

  247. Prediction of supra-glacial lake appearance in the Himalaya

    Akiko Sakai, Takayuki Nuimura, Koji Fujita, Takeo Tadono

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010 

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    Event date: 2010

    Language:English  

  248. Ice thickness and flow velocity measurements on Yala Glacier, Nepal Himalayas

    Kenta Tone, Shin Sugiyama, Kotaro Fukui, Koji Fujita

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2010 

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    Event date: 2010

    Language:English  

  249. A455 降雪粒子カウンターとシーロメータによる降雪量観測(降水システムIV,一般口頭発表)

    平沢 尚彦, 小西 啓之, 石坂 雅昭, 和田 誠, 藤田 耕史

    大会講演予講集  2010  日本気象学会

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    Event date: 2010

    Language:Japanese  

  250. 南極ドームふじ氷床コアによる過去72万年の氷期-間氷期スケールにおけるダストフラックス変動

    三宅隆之, 藤井理行, 平林幹啓, 植村立, 植村立, 倉元隆之, 東久美子, 本山秀明, 藤田耕史, 堀川信一郎, 飯塚芳徳, 五十嵐誠, 河野美香, 河野美香, 鈴木啓助, 鈴木利孝

    雪氷研究大会講演要旨集  2010 

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    Event date: 2010

  251. 南極内陸における表層積雪の水安定同位体と主要イオン濃度

    保科優, 藤田耕史, 中澤文男, 飯塚芳徳, 三宅隆之, 平林幹啓, 倉元隆之, 本山秀明

    雪氷研究大会講演要旨集  2010 

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    Event date: 2010

  252. Glacial lake outburst floods (GLOF) in the Himalayas.

    The 5th International Coordination Group (ICG) Meeting GEOSS Asian Water Cycle Initiative (AWCI) 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  253. Satellite-era glacier changes in High Asia. International conference

    NASA 'Black Carbon and Aerosols' press conference, American Geophysical Union Fall Meeting 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (invited, special)  

  254. Estimation of black carbon deposition from particulate data in the atmosphere at NCO-P site in Himalayas during pre-monsoon season and its implication to snow surface albedo reduction. International conference

    American Geophysical Union Fall Meeting 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

  255. DNA analysis of a single Pinus pollen grain in a glacier. International conference

    American Geophysical Union Fall Meeting 

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    Event date: 2009.12

    Language:English   Presentation type:Poster presentation  

  256. ASTER L3A01(VNIR, TIR, DEM)を用いたヒマラヤの氷河表面状態の時系列変化.

    縫村崇行, 藤田耕史, 山口悟, Sharma RR

    日本リモートセンシング学会, 名古屋 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  257. ASTERデータを用いたブータン・ヒマラヤにおけるデブリ氷河の形成要因解析.

    永井裕人, 藤田耕史, 縫村崇行

    日本リモートセンシング学会, 名古屋 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  258. Postdepositional changes of chemical components in the snow at Dome Fuji, Antarctica.

    The 2nd International Symposium on Dome Fuji Ice Core and Related Topics, Tachikawa, Tokyo 

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    Event date: 2009.11

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  259. Variability of sea-salt, mineral dust and non-sea-salt sulfate aerosols at Dome Fuji, East Antarctica during the past seven glacial cycles.

    The 2nd International Symposium on Dome Fuji Ice Core and Related Topics, Tachikawa, Tokyo 

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    Event date: 2009.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  260. 西中国ドゥンデで再掘削されたアイスコアの化学成分の変化.

    山本知聖, 藤田耕史, 竹内望, 三宅隆之, 中澤文男, 五十嵐誠, 佐藤和秀, 中尾正義

    極域気水圏シンポジウム, 国立極地研究所, 立川 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  261. ロシア・アルタイ山脈ベルーハアイスコア中の気泡による層位解析.

    岡本祥子, 藤田耕史, 成田英器, 植竹淳, 竹内望, 三宅隆之, 中澤文男, Aizen VB, Nikitin SA, 中尾正義

    極域気水圏シンポジウム, 国立極地研究所, 立川 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  262. 氷河試料中のマツ属花粉1粒ずつのDNA分析.

    中澤文男, 植竹淳, 陶山佳久, 金子亮, 竹内望, 藤田耕史, 神田啓史

    極域気水圏シンポジウム, 国立極地研究所, 立川 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  263. ASTERデータを用いたブータン・ヒマラヤにおけるデブリ氷河の形成要因解析.

    永井裕人, 藤田耕史, 縫村崇行

    極域気水圏シンポジウム, 国立極地研究所, 立川 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  264. 南極ドームふじ積雪の化学成分の堆積後の変化.

    保科優, 藤田耕史, 中澤文男, 飯塚芳徳, 三宅隆之, 平林幹啓, 倉元隆之, 本山秀明

    極域気水圏シンポジウム, 国立極地研究所, 立川 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  265. Deuterium-excess record from the Dome Fuji ice core over the past 720,000 years.

    The 2nd International Symposium on Dome Fuji Ice Core and Related Topics, Tachikawa, Tokyo 

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    Event date: 2009.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  266. Dust record from the Dome Fuji ice core, Antarctica over the past 720-kyrs.

    The 2nd International Symposium on Dome Fuji Ice Core and Related Topics, Tachikawa, Tokyo 

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    Event date: 2009.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  267. Temporal change of glacier surface in Himalayas using ASTER L3A01 (VNIR, TIR, and DEM)

    縫村崇行, 藤田耕史, 山口悟, SHARMA Rishi

    日本リモートセンシング学会学術講演会論文集  2009.11.18 

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    Event date: 2009.11

    Language:Japanese  

  268. 皆既日食が地上付近の大気および積雪におよぼす影響-2003年11月23日南極ドームふじでの観測結果-.

    亀田貴雄, 藤田耕史, 杉田興正,平沢尚彦,高橋修平

    日本気象学会, 福岡 

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    Event date: 2009.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  269. 北アルプス立山における積雪分布の季節変化に関する研究.

    佐竹智樹, 藤田耕史, 飯田肇, 福井幸太郎, 川田邦夫

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  270. ヒマラヤにおける氷河湖の危険度再評価.

    藤田耕史

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  271. キルギス天山山脈グリゴレア氷帽のアイスコア中の花粉の分析と年代決定.

    世良峻太郎, 竹内望, 藤田耕史, 岡本祥子, 直木和弘, Aizen VB

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  272. 1978年から2002年における中国祁連山域からの流出と氷河平衡線高度の復元.

    坂井亜規子, 藤田耕史, 奈良間千之, 窪田順平, 中尾正義, 姚檀棟

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  273. ヒマラヤ山脈における氷河湖の形成条件.

    坂井亜規子, 藤田耕史

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  274. 多時期のデジタル地形データ(DEM)を用いた、氷河表面高度の時間的・空間的な変動の解析.

    縫村崇行, 藤田耕史, 山口悟, Sharma RR

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  275. 南極ドームふじ積雪の堆積後の変化.

    保科優, 藤田耕史, 飯塚芳徳, 三宅隆之, 平林幹啓, 倉元隆之, 本山秀明

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  276. ロシア・アルタイ山脈ベルーハ氷河アイスコア中の気泡に着目した層位解析.

    岡本祥子, 藤田耕史, 成田英器, 植竹淳, 竹内望, 三宅隆之, 中澤文男, Aizen VB, Nikitin SA, 中尾正義

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  277. 氷河試料中のマツ属花粉1粒ずつのDNA分析.

    中澤文男, 植竹淳, 陶山佳久, 竹内望, 藤田耕史, 神田啓史

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  278. 西中国ドゥンデで再掘削されたアイスコアの化学成分の変化.

    山本知聖, 藤田耕史, 竹内望, 三宅隆之, 中澤文男, 五十嵐誠, 佐藤和秀, 中尾正義

    日本雪氷学会全国大会, 札幌 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  279. Recent changes in benchmark glaciers in Nepal Himalaya. International conference

    International Workshop on the Northern Eurasia Mountain Ecosystems, NEESPI/NASA and CEOP HE, Bishkek, Kyrgyzstan 

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    Event date: 2009.9

    Language:English   Presentation type:Oral presentation (invited, special)  

  280. Re-evaluation of past summer temperature reconstruction by melt features in Belukha ice cores, Russian Altai. International conference

    International Workshop on the Northern Eurasia Mountain Ecosystems, NEESPI/NASA and CEOP HE, Bishkek, Kyrgyzstan 

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    Event date: 2009.9

    Language:English   Presentation type:Poster presentation  

  281. 多時期のデジタル地形データ(DEM)を用いた,氷河表面高度の時間的・空間的な変動の解析

    縫村崇行, 藤田耕史, 山口悟, SHARMA Rishi

    雪氷研究大会講演要旨集  2009.9.5 

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    Event date: 2009.9

    Language:Japanese  

  282. Environmental changes during the past seven glacial cycles reconstructed from Dome Fuji, East Antarctica. International conference

    IAMAS/IAPSO/IACS 2009 Joint Assembly (MOCA-09), Motreal, Canada 

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    Event date: 2009.7

    Language:English   Presentation type:Oral presentation (invited, special)  

  283. 南極ドームふじ基地における雲・降水の観測と数値モデリング.

    平沢尚彦, 藤田耕史, 樫原和則, 北和之, 劉発華, 本山秀明, 林政彦

    日本気象学会春季大会, つくば 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  284. 北アルプス立山における積雪分布の季節変化に関する研究.

    佐竹智樹, 藤田耕史

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  285. ロシア・アルタイ山脈ベルーハ氷河アイスコアの氷層を用いた夏季気温復元法の再検証.

    岡本祥子, 藤田耕史, 植竹淳, 竹内望, 三宅隆之, 中澤文男, 中尾正義

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  286. Distribution of glaciers elevation changes in Khumbu Himal, Nepal Himalaya since 1984 using with multitemporal DEM.

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  287. 種レベルでの花粉分析を目的とした氷河試料中のマツ属花粉1粒ずつのDNA分析.

    中澤文男, 植竹淳, 竹内望, 藤田耕史, 神田啓史

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  288. 南極ドームふじ氷床コアにおける過去72万年のダストフラックス変動.

    三宅隆之, 藤井理行, 平林幹啓, 植村立, 倉元隆之, 東久美子, 本山秀明, 飯塚芳徳, 五十嵐誠, 河野美香, 鈴木啓助, 鈴木利孝, 藤田耕史, 堀川信一郎

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  289. 南極ドームふじ基地で観測された皆既日蝕(2003年11月23日)が氷床表面近傍の大気および積雪に与えた影響.

    亀田貴雄, 藤田耕史, 杉田興正,平沢尚彦,高橋修平

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  290. ヒマラヤにおける氷河湖の危険度再評価.

    藤田耕史

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  291. キルギス・グレゴリア氷河から掘削されたアイスコアの遺伝子解析による古環境復元.

    瀬川高弘, 竹内望, 藤田耕史, 岡本祥子, 直木和弘, 神田啓史

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  292. 西中国ドゥンデで再掘削されたアイスコアの化学成分の変化.

    山本知聖, 藤田耕史, 竹内望, 三宅隆之, 中澤文男, 五十嵐誠, 佐藤和秀, 中尾正義

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  293. キルギスタン・グリゴレア氷帽から掘削した87mアイスコア.

    竹内望, 藤田耕史, 岡本祥子, 直木和弘, 奈良間千之

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  294. キルギス・天山山脈グリゴレア氷帽のアイスコア中の花粉の分析と年代決定.

    世良峻太郎, 竹内望, 藤田耕史, 岡本祥子, 直木和弘

    日本地球惑星科学連合大会, 幕張 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  295. A156 南極ドームふじ基地における雲・降水の観測と数値モデリング(グローバルな雲・降水システムの研究の現状と将来,専門分科会)

    平沢 尚彦, 藤田 耕史, 樫原 和則, 北 和之, 劉 発華, 本山 秀明, 林 政彦

    大会講演予講集  2009.4.30  社団法人日本気象学会

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    Event date: 2009.4

  296. Re-evaluation of past summer temperature reconstruction by melt features in Belukha ice cores, Russian Altai. International conference

    European Geoscience Union General Assembly 2009 Vienna, Austria 

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    Event date: 2009.4

    Language:English   Presentation type:Poster presentation  

  297. Analysis of meteorological data and the surface energy balance of Keqicar Glacier, Tien Shan, China. International conference

    European Geoscience Union General Assembly 2009 Vienna, Austria 

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    Event date: 2009.4

    Language:English   Presentation type:Poster presentation  

  298. Seasonal variation of O-17 anomaly in Antarctic precipitation

    Osamu ABE, Koji FUJITA, Naohiro YOSHIDA

    Proceedings of the 3rd International Symposium on Isotopomers, 27-31 August 2006, La Jolla, USA.  2009.3 

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    Event date: 2009.3

    Language:English  

  299. DNA analysis of a single Pinus pollen grain in a glacier

    Fumio Nakazawa, Jun Uetake, Hiroshi Kanda, Yoshihisa Suyama, Nozomu Takeuchi, Koji Fujita

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  300. Changes in chemical species in a re-drilled Dunde ice core, western China

    Yamamoto Tomokiyo, Fujita Koji, Takeuchi Nozomu, Miyake Takayuki, Nakazawa Fumio, Igarashi Makoto, Satow Kazuhide, Nakawo Masayoshi

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2009

    Language:Japanese  

  301. 北アルプス立山における積雪分布の季節変化に関する研究

    佐竹智樹, 藤田耕史, 飯田肇, 福井幸太郎, 川田邦夫

    雪氷研究大会講演要旨集  2009 

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    Event date: 2009

  302. Condition of glacier lake formation in the Himalayas

    Akiko Sakai, Koji Fujita

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  303. Stratigraphy analysis focused on air bubbles in Belukha ice core, Russian Altai

    Sachiko Okamoto, Koji Fujita, Hideki Narita, Jun Uetake, Takayuki Miyake, Fumio Nakazawa, Nozomu Takeuchi, Vladimir B. Aizen, Stanislav A. Nikitin, Masayoshi Nakowo

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  304. Spatial temporal changes of glaciers surface elevation in Khumbu Himal, use of field survey data and multi-temporal DEMs

    Takayuki Nuimura, Koji Fujita, Satoru Yamaguchi, Rishi Sharma

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  305. Seasonal change in snow covers distribution at Mt. Tateyama

    Tomoki Satake, Koji Fujita, Hajime Iida, Kotaro Fukui, Kunio Kawada

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  306. Reconstructions of annual discharge and glacier ELA at Qilian mountains in northwest China from 1978 to 2002

    Akiko Sakai, Koji Fujita, Chiyuki Narama, Jumpei Kubota, Masayoshi Nakawo, Tandong Yao

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  307. Re-evaluation of potential of glacial lake outburst flood in the Himalayas

    Koji Fujita

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009 

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    Event date: 2009

    Language:English  

  308. C216 皆既日食が地上付近の大気および積雪におよぼす影響 : 2003年11月23日南極ドームふじでの観測結果(物質循環・放射)

    亀田 貴雄, 藤田 耕史, 杉田 興正, 平沢 尚彦, 高橋 修平

    大会講演予講集  2009  日本気象学会

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    Event date: 2009

    Language:Japanese  

  309. Analysis and dating of the ice core of the Grigoriev ice cap in tien shan, Kirghiz

    Sera Shuntarou, Takeuchi Nozomu, Fujita Kouji, Okamoto Shouko, Naoki Kazuhiro, Aizen Vladimr

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2009

    Language:Japanese  

  310. Postdepositional changes of chemical components in the snow at Dome Fuji, Antarctica

    Hoshina Yu, Fujita Koji, Nakazawa Fumio, Iizuka Yoshinori, Miyake Takayuki, Hirabayashi Motohiro, Kuramoto Takayuki, Motoyama Hideaki

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2009  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2009

    Language:Japanese  

  311. A 720-kyear record of dust variability from the Dome Fuji ice core, Antarctica. International conference

    American Geophysical Union Fall Meeting, San Francisco, USA 

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    Event date: 2008.12

    Language:English   Presentation type:Oral presentation (general)  

  312. Surface velocities and elevation change of the maritime Hailuogou Glacier, China.

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    Event date: 2008.12

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  313. ドームふじにおける過去72万年間のオービタル・スケール及び千年スケールのエアロゾル変動.

    三宅隆之, 藤井理行, 平林幹啓, 植村立, 倉元隆之, 東久美子, 本山秀明, 飯塚芳徳, 五十嵐誠, 河野美香, 鈴木啓助, 鈴木利孝, 藤田耕史, 堀川信一郎

    極域気水圏シンポジウム, 国立極地研究所, 板橋 

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    Event date: 2008.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  314. ロシア・アルタイ山脈部ルーは氷河雪氷コア中の氷層を用いた夏季気温復元.

    岡本祥子, 藤田耕史, 成田英器, 植竹淳, 竹内望, 三宅隆之, 中澤文男, Aizen VB, Nikitin SA, 中尾正義

    極域気水圏シンポジウム, 国立極地研究所, 板橋 

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    Event date: 2008.12

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  315. 南極ドームふじ氷床コアにおける最終氷期の温暖化イベント(AIMイベント)の連続化学分析.

    東久美子, 平林幹啓, 三宅隆之, 植村立, 倉元隆之, 本山秀明, 五十嵐誠, 飯塚芳徳, 鈴木啓助, 鈴木利孝, 藤田耕史, 堀川信一郎, 河野美香, 藤井理行, 川村賢二, 青木周司, 中澤高清

    極域気水圏シンポジウム, 国立極地研究所, 板橋 

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    Event date: 2008.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  316. Orbital and millennial-scale variability of sea-salt, dust and non-sea-salt sulfate aerosols during the past 720,000 years reconstructed at Dome Fuji, East Antarctica. International conference

    Quaternary Climate: from Pole to Pole, EPICA Open Science Conference, Venice, Italy 

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    Event date: 2008.11

    Language:English   Presentation type:Oral presentation (general)  

  317. A 720,000 years record of deuterium-excess variation from the Dome Fuji ice core, Antarctica. International conference

    Quaternary Climate: from Pole to Pole, EPICA Open Science Conference, Venice, Italy 

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    Event date: 2008.11

    Language:English   Presentation type:Oral presentation (general)  

  318. Predominance of clear-sky precipitation at Antarctic interior ice coring sites - myth or truth? International conference

    Quaternary Climate: from Pole to Pole, EPICA Open Science Conference, Venice, Italy 

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    Event date: 2008.11

    Language:English   Presentation type:Poster presentation  

  319. 氷河湖形成と流動の関係に関する考察―序報―

    山口悟, 藤田耕史, 坂井亜規子

    雪氷研究大会講演要旨集  2008.9.5 

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    Event date: 2008.9

    Language:Japanese  

  320. 皆既日食が地上付近の大気および雪面におよぼす影響-2003年11月23日ドームふじでの地上観測結果-.

    亀田貴雄, 藤田耕史, 杉田興正,本山秀明,平沢尚彦,高橋修平

    日本雪氷学会全国大会, 東京 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  321. Volume change estimation of glaciers in Khumbu Himal region using with multitemporal digital elevation model. International conference

    10th International Symposium on High Mountain Remote Sensing Cartography, Kathmandu, Nepal 

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    Event date: 2008.9

    Language:English   Presentation type:Oral presentation (general)  

  322. TerraSAR-Xによる氷河モニタリングの可能性.

    山根尚文, 野中崇志, 柴山卓史, 高岸且, 藤田耕史

    日本雪氷学会全国大会, 東京 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  323. 氷河湖形成と流動の関係に関する考察-序報-.

    山口悟, 藤田耕史, 坂井亜規子

    日本雪氷学会全国大会, 東京 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  324. キルギスタン・グリゴレア氷帽から掘削した87mアイスコア.

    竹内望, 藤田耕史, 岡本祥子, 直木和弘,奈良間千之,Aizen VB

    日本雪氷学会全国大会, 東京 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  325. Volume change estimation of glaciers in Khumbu Himal region using with multitem- poral digital elevation model model

    Nuimuta T, Fujita K, Yamaguchi S, Sharma RR

    Proceedings of the 10th High Mountain Remote Sensing Cartography  2008.9 

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    Event date: 2008.9

    Language:English  

  326. Accuracy evaluation of DEM derived by TerraSAR-X data in the Himalayan region. International conference

    ISPRS International Society for Photogrammetry and Remote Sensing, Beijing, China 

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    Event date: 2008.7

    Language:English   Presentation type:Poster presentation  

  327. Accuracy evaluation of DEM derived by TerraSAR-X data in the Himalayan region

    Yamane N, Fujita K, Nonaka T, Shibayama T, Takagishi S

    The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  2008.7 

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    Event date: 2008.7

    Language:English  

  328. Yeast distribution in ice core from Russian Altai mountains. International conference

    The 3rd International Conference on Polar and Alpine Microbiology, Banff, Canada 

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    Event date: 2008.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  329. MODISデータによる東南極氷床域における積雪粒径の抽出.

    本吉弘岐, 青木輝夫, 山内恭, 藤田耕史, 谷川朋範

    日本気象学会2008年度春季大会, 横浜 

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    Event date: 2008.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  330. 南極ドームふじ基地の冬季の降雪の鉛直分布.

    平沢尚彦, 劉発華, 藤田耕史

    日本気象学会2008年度春季大会, 横浜 

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    Event date: 2008.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  331. 氷河湖監視のためのASTERデータを利用した氷河湖マッピング.

    諸星敏一, 伊東明彦, 宮本潤, 藤田耕史

    日本リモートセンシング学会平成20年度春季学術講演会, 横浜 

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    Event date: 2008.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  332. Effect of precipitation seasonality on glacier mass balance. International conference

    International Workshop on Mass Balance Measurements and Modelling, Skeikampen, Norway 

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    Event date: 2008.3

    Language:English   Presentation type:Oral presentation (general)  

  333. Recent contribution of glacial meltwater in the Chon-Kyzylsuu river basin of Teskey Ala-Too range, Tien Shan mountains. International conference

    International Workshop on Mass Balance Measurements and Modelling, Skeikampen, Norway 

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    Event date: 2008.3

    Language:English   Presentation type:Poster presentation  

  334. The potential of TerraSAR-X for glacier monitoring

    Yamane Naofumi, Nonaka Takashi, Shibayama Takashi, Takagishi Susumu, Fujita Koji

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2008  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2008

    Language:Japanese  

  335. MODISデータによる東南極氷床域における積雪粒径の抽出

    本吉弘岐, 青木輝夫, 山内恭, 山内恭, 藤田耕史, 谷川朋範

    日本気象学会大会講演予稿集  2008 

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    Event date: 2008

  336. Meteorological effects of the total solar eclipse of 23 November 2003 observed in a cloudless condition at Dome Fuji Station, East Antarctic ice sheet

    T. Kameda, S. Takahashi, K. Fujita, O. Sugita, H. Motoyama, N. Hirasawa

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2008 

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    Event date: 2008

    Language:English  

  337. Report of ice core drilling on the Grigoriev Ice Cap in Kyrgyz Tienshan Mts

    Nozomu Takeuchi, Koji Fujita, Sachiko Okamoto, Kazuhiro Naoki, Chiyuki Narama, Vladimir Aizen

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2008 

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    Event date: 2008

    Language:English  

  338. P412 南極ドームふじ基地の冬季の降雪の鉛直分布

    平沢 尚彦, 劉 発華, 藤田 耕史

    大会講演予講集  2008  日本気象学会

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    Event date: 2008

    Language:Japanese  

  339. ドームふじにおける過去72万年間のオービタル・スケール及び千年スケールのエアロゾル変動

    東久美子, 平林幹啓, 三宅隆之, 植村立, 植村立, 倉元隆之, 本山秀明, 五十嵐誠, 飯塚芳徳, 鈴木啓助, 鈴木利孝, 藤田耕史, 堀川信一郎, 河野美香, 河野美香, 藤井理行, 川村賢二, 青木周司, 中澤高清

    極域気水圏シンポジウムプログラム・講演要旨  2008 

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    Event date: 2008

  340. Interdependence of glacier lake formation on glacier dynamics

    Satoru Yamaguchi, Koji Fujita, Akiko Sakai

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research  2008  The Japanese Society of Snow and Ice / Japan Society for Snow Engineering

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    Event date: 2008

    Language:English  

  341. 南極ドームふじにおける過去72万年のダスト変動

    三宅隆之, 藤井理行, 平林幹啓, 植村立, 植村立, 倉元隆之, 東久美子, 本山秀明, 飯塚芳徳, 五十嵐誠, 河野美香, 河野美香, 鈴木啓助, 鈴木利孝, 藤田耕史, 堀川信一郎

    極域気水圏シンポジウムプログラム・講演要旨  2008 

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    Event date: 2008

  342. Fluctuation of discharge from mountain area in arid region of China

    SAKAI Akiko, FUJITA Koji, NARAMA Chiyuki, KUBOTA Jumpei, Yao Tandong

    Proceeding of Annual Conference  2007  THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES

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    Event date: 2007

    Language:Japanese  

  343. Reconstruction of summer temperature by using melt features in an ice core at Belukha Glacier, Russian Altai Mountains

    Okamoto Sachiko, Fujita Koji, Narita Hideki, Uetake Jun, Takeuchi Nozomu, Miyake Takayuki, Nakazawa Fumio

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2007  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2007

    Language:Japanese  

  344. Aerosol flux variation on the East Antarctic Plateau during the past 720,000 years

    Goto-Azuma Kumiko, Hirabayashi Motohiro, Miyake Takayuki, Uemura Ryu, Kohno Mika, Motoyama Hideaki, Fujii Yoshiyuki, Iizuka Yoshinori, Horikawa Shinichiro, Suzuki Toshitaka, Igarashi Makoto, Satow Kazuhide, Suzuki Keisuke, Fukuoka Takaaki, Fujita Koji, Yoshida Naohiro, Watanabe Okitsugu

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2007  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2007

    Language:Japanese  

  345. A record of dust concentration variation in the Dome Fuji deep ice cores, Antarctica

    Miyake Takayuki, Fujii Yoshiyuki, Goto-Azuma Kumiko, Iizuka Yoshinori, Igarashi Makoto, Uemura Ryu, Kohno Mika, Satow Kazuhide, Suzuki Keisuke, Suzuki Toshitaka, Hirabayashi Motohiro, Fukuoka Takaaki, Fujita Koji, Horikawa Shinichiro, Motoyama Hideaki, Yoshida Naohiro, Watanabe Okitsugu

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2007  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2007

    Language:Japanese  

  346. Fluctuation of discharge from mountain area at arid region of China

    SAKAI Akiko, FUJITA Koji, NARAMA Chiyuki, KUBOTA Jumpei

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2007  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2007

    Language:Japanese  

  347. Glacier variation analysis using with remote sensing data and topographical map in Khumbu Himal, Nepal Himalayas.

    Nuimura Takayuki, Fujita Koji

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2007  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2007

    Language:Japanese  

  348. さまざまな降水条件下における氷河の応答特性

    山口悟, 藤田耕史, 坂井亜規子

    日本雪氷学会全国大会講演予稿集  2006.10.20 

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    Event date: 2006.10

    Language:Japanese  

  349. Recent changes of glacier runoff in the Terskey-Alatoo Range, Kyrgyz Republic

    NARAMA Chiyuki, FUJITA Koji, KAJIURA Takeshi

    2006.3.10 

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    Event date: 2006.3

    Language:Japanese  

  350. 衛星データから推定された南極域における積雪粒径の季節変化

    本吉弘岐, 青木輝夫, 谷川朋範, 堀雅裕, 門崎学, 藤田耕史, 平沢尚彦, 山内恭

    日本雪氷学会全国大会講演予稿集  2006 

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    Event date: 2006

  351. Glacio-biological ice cores analyses from Belukha Glacier.

    Uetake Jun, Kohshima Shiro, Nakazawa Fumio, Segawa Takahiro, Miyake Takayuki, Yoshimura Yoshitaka, Narita Hideki, Fujita Koji, Takeuchi Nozomu, Nakao Masayoshi

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2006  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2006

    Language:Japanese  

  352. Chemical composition of surface ice at July 1st Glacier, Qilian Mountains, China

    Miyake Takayuki, Uetake Jun, Matoba Sumito, Sakai Akiko, Fujita Koji, Fujii Yoshiyuki, Yao Tandong, Nakawo Masayoshi

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2006  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2006

    Language:Japanese  

  353. Ablation and accumulation processes of the Hamaguriyuki snow patch in Mt.Tateyama

    Hiyama Kuniharu, Koji Fujita, Ageta Yutaka, Iida Hajime

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2006  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2006

    Language:Japanese  

  354. Melting amount of the Kara-Batkak Glacier in Kyrgyz Republic

    NARAMA Chiyuki, FUJITA Koji, KAJIURA Takeshi

    2005.3.10 

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    Event date: 2005.3

    Language:Japanese  

  355. 南極域におけるMODIS1.6μmチャンネルを用いた積雪粒径抽出

    本吉弘岐, 青木輝夫, 谷川朋範, 堀雅裕, 門崎学, 藤田耕史, 平沢尚彦, 山内恭

    極域気水圏シンポジウムプログラム・講演要旨  2005 

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    Event date: 2005

  356. MODISデータによる南極域における積雪物理量の抽出

    本吉弘岐, 青木輝夫, 谷川朋範, 堀雅裕, 門崎学, 藤田耕史, 平沢尚彦, 山内恭

    日本雪氷学会全国大会講演予稿集  2005 

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    Event date: 2005

  357. Size distribution and deposition rate of dust in an ice core at Belukha Glacier, Russian Altai Mountains

    Miyake Takayuki, Fujii Yoshiyuki, Nakazawa Fumio, Uetake Jun, Takeuchi Nozomu, Fujita Koji, Nakawo Masayoshi

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2005  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2005

  358. Glacio-biological ice cores analyses from Belukha Glacier

    Uetake Jun, Kohshima Shiro, Nalazawa Fumio, Takeuchi Nozomu, Miyake Takayuki, Fujita Koji, Nakawo Masayoshi

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2005  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2005

  359. ADEOS II/GLIプロダクトに関連する南極域検証活動

    青木輝夫, 本吉弘岐, 堀雅裕, 若林裕之, 吉沢宣之, 佐藤之紀, 藤田耕史, 橋田元, 平沢尚彦

    極域気水圏シンポジウムプログラム・講演要旨  2004 

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    Event date: 2004

  360. Variation of Biological Activity on a Himalayan Glacier Recovered from a Shallow Ice Core

    Takeuchi Nozomu, Fujita Koji, Nakazawa Fumita, Matoba Sumito, Nakawo Masayoshi, Rana Birbal

    Preprints of the Annual Conference, Japanese Society of Snow and Ice  2004  THE JAPANESE SOCIETY OF SNOW AND ICE

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    Event date: 2004

  361. P331 日食時の気象の変化 : 2003年11月24日、南極ドームふじ観測拠点での観測

    亀田 貴雄, 藤田 耕史, 杉田 興正, 高橋 修平

    大会講演予講集  2004  日本気象学会

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    Event date: 2004

    Language:Japanese  

  362. ネパールヒマラヤ・イムジャ氷河湖の拡大と湖盆の変化

    坂井亜規子, 西村浩一, 矢吹裕伯, 斎藤光義, 山田知充, 藤田耕史, GURUNG C B

    日本雪氷学会全国大会講演予稿集  2002 

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    Event date: 2002

  363. Distribution of surface flow velocity on the ablation area of the Lirung Glacier, Nepal Himalayas.

    内藤望, 青木賢人, 藤田耕史, 中尾正義, 坂井亜規子, 門田勤, 朝日克彦, 白岩孝行, 瀬古勝基

    日本雪氷学会全国大会講演予稿集  1997.10 

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    Event date: 1997.10

  364. The relation between snow patch shape and snowmelt distribution on HAMAGURI-YUKI.

    長田充弘, 上田豊, 中尾正義, 矢吹裕伯, 藤田耕史, 内藤望, 坂井亜規子, 飯田肇

    日本雪氷学会全国大会講演予稿集  1997 

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    Event date: 1997

  365. チベット高減中央部の陸域水循環の季節変化の特性について

    大畑哲夫, 上田豊, 瀬古勝基, 矢吹裕伯, 藤田耕史, 小池俊雄, 太田岳史, 小池正子, 瀧沢英紀

    日本気象学会大会講演予稿集  1995 

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    Event date: 1995

  366. Anomalous winter-snow-amplified earthquake-induced disaster of the 2015 Langtang avalanche in Nepal Invited International conference

    Fujita K, Inoue H, Izumi T, Yamaguchi S, Sadakane A, Sunako S, Nishimura K, Immerzeel WW, Shea JM, Kayastha RB, Sawagaki T, Breashears DF, Yagi H, Sakai A

    Third Pole Science Summit - TPE-CSTP-HKT Joint Conference  2017.7.12 

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kunming, China  

  367. Contrasting glacier responses to recent climate change in high-mountain Asia Invited International conference

    Sakai A, Fujita K

    Third Pole Science Summit - TPE-CSTP-HKT Joint Conference  2017.7.10 

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kunming, China  

  368. 全球規模での氷河縮小と海水準上昇の将来予測

    藤田耕史, 坂井亜規子

    日本地球惑星科学連合大会  2018.5.23 

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    Language:Japanese   Presentation type:Oral presentation (general)  

  369. Ambient seismic noise at a Himalayan debris-covered glacier

    Podolskiy EA, Fujita K, Sunako S, Tsushima A, Kayastha RB

    Japan Geoscience Union Meeting 2018  2018.5.24 

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    Language:English   Presentation type:Oral presentation (general)  

  370. Modelling development and decay of cryoconite holes on Qaanaaq Ice Cap, northwestern Greenland International conference

    Fujita K, Takeuchi N, Niwano M, Aoki T

    Cryosphere and Biosphere  2018.3.19  International Glaciological Society

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kyoto, Japan  

  371. In-situ measurement of mass balance on a debris-covered Trambau Glacier, Nepal Himalaya International conference

    Fujita K, Sunako S, Sakai A, Fukui K, Sugiyama S, Kayastha RB

    American Geophysical Union Fall Meeting 2017  2017.12.15  American Geophysical Union

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:New Orleans, USA  

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Works 7

  1. Ice core drilling at Gregoriev Glacier, Tiensha Mts., Kyrgyz

    2006.8
    -
    2007.9

  2. Glacier and glacial lake research in Lunana region, Bhutan

    2004.9
    -
    2004.10

  3. 44th Japanese Antarctica Research Expedition

    2002.11
    -
    2004.3

  4. Glaciological Research in the Qilian Mts, China

    2002.6
    -
    2005.7

  5. Glaciological Research in the Altai Mts., Russia

    2001
    -
    2002

  6. Research on Changes in glacier in the Nepal Himalayas

    1994
    -
    2002

  7. Glaciological Research in the Tanggula Mts., Tibet

    1992
    -
    1994

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Research Project for Joint Research, Competitive Funding, etc. 4

  1. ネパール・ランタン谷における雪氷土砂災害の調査

    2015.6 - 2016.6

    J-RAPID 

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    Grant type:Competitive

  2. Study on Glacial Lake Outburst Floods in the Bhutan Himalayas

    2008.11 - 2012.3

    International Cooperative Research 

  3. 総合地球環境学研究所 研究プロジェクト「水資源変動負荷に対するオアシス地域の適応力評価とその歴史的変遷」

    2001.4 - 2007.3

    国際共同研究 

  4. Deep Ice Coring Project at Dome Fuji, Antarctica-II

    2001 - 2006

    Cooperative Research within Japan 

KAKENHI (Grants-in-Aid for Scientific Research) 26

  1. Unravelling precipitation systems in the Himalayas using in-situ observations, remote sensing and cloud-resolving models

    Grant number:23KK0064  2023.9 - 2028.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (International Collaborative Research)

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    Authorship:Coinvestigator(s) 

  2. Geographical distribution of thermal regime of high mountain Asian glaciers and its impact on future glacier fluctuation

    Grant number:22H00033  2022.4 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\42120000 ( Direct Cost: \32400000 、 Indirect Cost:\9720000 )

  3. Quantifying the effects of polar amplification on the Greenland ice sheet mass balance

    Grant number:21H03582  2021.4 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  4. A study on precipitation variability over the Himalayas induced by the complex topography and large-scale moist flows

    Grant number:18KK0098  2018.10 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

    Fujinami Hatsuki

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    To better understand summer precipitation, including heavy rainfall events at higher elevations in the Himalayas and the mechanisms of its variability, we carried out an international collaborative research project between Japan and Nepal. We installed rain-gauge network around the Rolwaling to understand the detailed features of summer precipitation in the eastern Nepal Himalayas. We performed comprehensive research using the in-situ observation space-borne precipitation radar, cloud resolving numerical models and atmospheric reanalysis dataset. We revealed precipitation increased twice daily with a daytime peak and a nighttime peak in the higher elevations, which is driven by a contrasting land surface effects. We also revealed that the heavy precipitation at the higher elevations came from the multiscale processes such as three-dimensional moisture transport driven by monsoon lows and the diurnal variation in heat fluxes from the land surface of the southern slopes of the Himalayas.

  5. Construction of world’s most reliable deposited-aerosol database on the Anthropocene (from 1850 to 2020)

    Grant number:18H05292  2018.6 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  6. Understanding the interaction between ice sheets, ocean and atmosphere under large scale climate changes of the past

    Grant number:17H06104  2017.5 - 2022.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    ABE-OUCHI AYAKO

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    To understand the interaction between ice sheets, ocean and atmosphere of the past, we simulated the glacial cycles at 1.6 to 1.2 million years before present and show that the large amplitudes of obliquity and eccentricity helped to determine the ice age termination and establish robust 41,000-year glacial cycles. Using an atmosphere-ocean coupled climate model, MIROC, we successfully simulated the millenial scale climate change, such as Dansgaard-Oschger oscillation, Boelling/Alleroed and Younger Dryas events as an unforced intrinsic oscillation of atmosphere-ocean-sea ice system under certain condition. The results of simulations of the two past ice age termination (T1 and T2) , together with Northern Hemisphere ice sheet model experiments suggest the importance of the transient climate and ocean (AMOC) responses to the different orbital forcing conditions of T1 and T2, through the mechanisms of mass loss of the Northern Hemisphere ice sheet and meltwater influx to the ocean.

  7. Elevation-dependent climate changes in the Nepal Himalaya as reconstructed from tree rings and ice cores

    Grant number:17H01621  2017.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Sano Masaki

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    An 81.2-m ice core was successfully recovered from Trambau Glacier in the Nepal Himalaya, which is considered to be one of the most prominent results for this project. On the other hand, tree-ring data collected from different altitudes indicate decreasing trends of precipitation in the Nepal Himalaya. In addition, the drying tendency is much more notable in high altitudes than in low altitudes.

  8. 基盤研究(A) 樹木年輪とアイスコアの統合解析によるアジア山岳域の標高別古気候復元

    2017.4 - 2021.3

    日本学術振興会  科学研究費補助金 

    佐野雅規

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    Grant type:Competitive

  9. Recent surface darkening and abrupt melting of Greenland ice sheet (SIGMA2)

    Grant number:16H01772  2016.4 - 2020.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Aoki Teruo

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    Authorship:Coinvestigator(s) 

    In order to clarify the recent surface melting of the Greenland ice sheet, in-situ field observations, satellite remote sensing and numerical modelling were conducted. In the field observations, existing automatic weather station observations were continued and the data were published. Ice core samples were analyzed to characterize water vapor and mineral dust transport. In satellite remote sensing, we developed an algorithm to retrieve the snow and ice physical parameters using a non-spherical snow particle shape model and quantified the causes of ice sheet surface darkening. In numerical modelling, a regional meteorological model including the detailed processes of light-absorbing aerosols (LAA) was developed. A regional meteorological model including snow metamorphism was used to simulate the time and spatial variation of ice sheet surface melting. In addition, the radiative forcing due to LAA in the atmosphere and snow/ice was estimated by an earth system model.

  10. 基盤研究(A) 近年のグリーンランド氷床表面の暗色化と急激な表面融解に関する研究

    2016.4 - 2020.3

    日本学術振興会  科学研究費補助金 

    青木輝夫

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    Grant type:Competitive

  11. Full-scale avalanche experiments and development of hazard map with PCQ

    Grant number:15H02992  2015.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    NISHIMURA KOUICHI

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    Authorship:Coinvestigator(s) 

    Systematic full-scale avalanche experiments have been carried out in Niseko, Hokkaido. Several video cameras were used to investigate the flow behavior. Further, drones were applied not only to record the avalanche motion but to create the digital elevation models for the pre- and post-avalanche events. In order to record the internal motion of avalanches, inertial measurements units (IMU) were also set. Seismometers and infrasound microphones were also set close to the avalanche path. Furthermore, a Doppler radar and an infrared camera were introduced. Obtained results revealed that the combination of different data is effective measures to characterize their structures.
    Further, we draw the snow avalanche hazard map in the study area with taking into account the uncertainty of the model input parameters: volume, bed friction angle and the position of the release. We introduced the Polynomial Chaos Quadrature method (PCQ) and probability of the avalanche arrival was evaluated.

  12. Investigation of state and fluctuation mechanisms of glaciers in high mountain Asia

    Grant number:26257202  2014.4 - 2018.3

    Fujita Koji

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    Authorship:Principal investigator 

    Grant amount:\40430000 ( Direct Cost: \31100000 、 Indirect Cost:\9330000 )

    To better understand fluctuations and their mechanisms of large glaciers in high mountain Asia, we conducted in-situ observations in the Nepal and Bhutan Himalayas with analyses of remotely sensed satellite data and of numerical modelling. We developed a numerical model for debris-covered glaciers, in which distribution of debris thermal resistance was estimated with remotely sensed data as a proxy of debris thickness, and then ice melting was calculated by considering heat balance. By analyzing high resolution remotely sensed satellite data, we revealed mass changes in a couple of Himalayan glaciers. In addition, we compiled glacier inventory covering high mountain Asia, and then revealed areal changes in glaciers in the eastern Himalayas. We also revealed that debris-cover extent was highly correlated with upper glacier-free slope facing southwest at which diurnal freeze-thaw cycle could produce and supply debris material on glacier.

  13. Effects of global environmental changes on glacier ecosystems

    Grant number:26241020  2014.4 - 2018.3

    Kohshima Shiro

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    Authorship:Coinvestigator(s) 

    We genetically analyzed microorganisms collected from the glaciers in various part of the world and found regional difference in species composition of bacteria and cyanobacteria in cryoconites, biogenic dark granules on the glacier that accelerate glacier melting. We could also identify symbiotic bacteria of glacier animals. We developed mathematical model simulating changes in cryoconite holes, melt holes on the glacier formed by cryoconite, to establish the mass valance model of the glacier including biological albedo reducing process.

  14. 基盤研究(A) 地球規模環境変動が氷河生態系に及ぼす影響評価

    2014.4 - 2018.3

    日本学術振興会  科学研究費補助金 

    幸島司郎

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    Grant type:Competitive

  15. 基盤研究(A) アジア高山域における大型氷河の動態把握と変動メカニズムの解明

    2014.4 - 2018.3

    日本学術振興会  科学研究費補助金 

    藤田耕史

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    Authorship:Principal investigator  Grant type:Competitive

  16. アジア高山域における大型氷河の動態把握と変動メカニズムの解明

    2014.3 - 2018.3

    科学研究費補助金  基盤研究(A)

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    Authorship:Principal investigator 

  17. ヒマラヤにおける氷河縮小が海水準上昇に与える影響の評価

    2007.4 - 2011.3

    科学研究費補助金  基盤研究(A)(海外),課題番号:19253001

    藤田 耕史

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    Authorship:Principal investigator 

  18. 雪氷中の微生物活動が氷河アルベドに及ぼす影響評価

    2007.4 - 2010.3

    科学研究費補助金  基盤研究(B)一般

    幸島司郎

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    Authorship:Coinvestigator(s) 

  19. 南米パタゴニア氷原における氷河変動のメカニズムの解明と完新世古環境の復元

    2006.4 - 2010.3

    科学研究費補助金  基盤研究(A)海外学術

    安仁屋政武

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    Authorship:Coinvestigator(s) 

  20. 中央ユーラシア乾燥域における近年の水文環境の変容と人間活動影響評価

    2006.4 - 2009.3

    科学研究費補助金  基盤研究(B)海外学術

    窪田順平

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    Authorship:Coinvestigator(s) 

  21. 極低温下における積雪内水蒸気輸送と安定同位体改変に関する研究

    2004.4 - 2007.3

    科学研究費補助金  若手研究(A),課題番号:16681002

    藤田 耕史

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    Authorship:Principal investigator 

  22. 極域雪氷中の環境変動シグナル抽出と環境情報復元に関する研究

    2003.4 - 2006.3

    科学研究費補助金  基盤研究(B)

    本山秀明

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    Authorship:Coinvestigator(s) 

  23. モンスーン・ヒマラヤにおける氷河縮小の動態解明

    2001.4 - 2005.3

    科学研究費補助金  基盤研究(A)(2)

    上田豊

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    Authorship:Coinvestigator(s) 

  24. アミノ酸のラセミ化反応を利用した雪氷コア年代測定手法の研究

    2000.4 - 2002.3

    科学研究費補助金  萌芽的研

    中尾正義

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    Authorship:Coinvestigator(s) 

  25. 夏雪型氷河の縮小加速の検証と将来予測

    1997.4 - 2000.3

    科学研究費補助金  国際学術研究/基盤研究(A)(2)

    上田豊

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    Authorship:Coinvestigator(s) 

  26. ヒマラヤ雪氷圏の最近の衰退の原因解明に関する研究

    1997.4 - 2000.3

    科学研究費補助金  基盤研究(B)(1)

    上田豊

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    Authorship:Coinvestigator(s) 

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Teaching Experience (On-campus) 7

  1. 温暖化概論

    2021

  2. Frontier of Earth and Planetary Sciences

    2021

  3. Frontier of Earth and Planetary Sciences

    2020

  4. Introduction to Environmental Behavior Studies

    2020

  5. 温暖化概論

    2019

  6. Introduction to Environmental Behavior Studies

    2019

  7. 地球科学基礎I

    2019

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