Updated on 2024/03/30

写真a

 
KURITA Naoyuki
 
Organization
Institute for Space-Earth Environmental Research Division for Land-Ocean Ecosystem Research Associate professor
Graduate School
Graduate School of Environmental Studies
Title
Associate professor

Degree 2

  1. Doctor of Science （ 2003.3   Tokyo Institute of Technology ） 

  2. A study on the response of isotopic composition of precipitation to atmospheric circulation over Siveria （ 2003.3   Tokyo Institute of Technology ） 

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Research Interests 1

  1. Water cycle

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Research History 9

  1. Nagoya University   Institute for Space-Earth Environmental Research   Resercher

    2015.4 - 2017.9

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    Country：Japan

  2. Nagoya University   Graduate School of Environmental Studies   Designated associate professor

    2013.4 - 2015.3

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    Country：Japan

  3. Japan Agency for Marine-Earth Science and Technology   Research Institute for Global Change   Researcher

    2012.4 - 2013.3

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    Country：Japan

  4. International Atomic Energy Agency (IAEA)   Isotope Hydrology   Consultant

    2011.1 - 2012.3

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    Country：Austria

  5. Japan Agency for Marine-Earth Science and Technology   Research Institute for Global Change   Researcher

    2009.4 - 2011.1

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    Country：Japan

  6. Japan Agency for Marine-Earth Science and Technology   Institute of Observational Research for Global Change   Researcher

    2006.4 - 2009.3

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    Country：Japan

  7. Japan Agency for Marine-Earth Science and Technology   Institute of Observational Research for Global Change   Postdoctoral researcher

    2004.7 - 2006.3

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    Country：Japan

  8. Japan Agency for Marine-Earth Science and Technology   Frontier Research Center for Global Change   Researcher

    2003.4 - 2004.3

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    Country：Japan

  9. Japan Agency for Marine-Earth Science and Technology   Frontier Research Center for Global Change   Research assistant

    2001.6 - 2003.3

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    Country：Japan

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Education 3

  1. Tokyo Institute of Technology   Graduate School, Division of Integrated Science and Engineering   Department of Environmental Science and Technology

    1998.4 - 2001.5

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    Country： Japan

  2. Hokkaido University   Graduate School, Division of Earth Environmental Science and Technology

    1996.4 - 1998.3

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    Country： Japan

  3. Hokkaido University   Faculty of Fisheries   Marine Chemistry

    - 1996.3

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    Country： Japan

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Papers 80

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

    Naoko Nagatsuka, Kumiko Goto-Azuma, Koji Fujita, Yuki Komuro, Motohiro Hirabayashi, Jun Ogata, Kaori Fukuda, Yoshimi Ogawa-Tsukagawa, Kyotaro Kitamura, Ayaka Yonekura, Fumio Nakazawa, Yukihiko Onuma, Naoyuki Kurita, Sune Olander Rasmussen, Giulia Sinnl, Trevor James Popp, Dorthe Dahl-Jensen

        2023.8

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

    Abstract. To investigate regional and temporal variations in the sources and atmospheric transport processes for mineral dust deposited on the Greenland Ice Sheet, we analysed the morphology and mineral composition of dust in an ice core from northeastern Greenland (East Greenland Ice-Core Project, EGRIP), representing the period from 1910 to 2013, using scanning electron microscopy and energy-dispersive X-ray spectroscopy, and compared the results with those previously obtained for an ice core from northwestern Greenland (SIGMA-D). The composition of the SIGMA-D ice-core dust, comprising mostly silicate minerals, varied on a multi-decadal timescale due to an increased contribution of minerals originating from local ice-free areas during recent warming periods. In contrast, for the EGRIP ice-core dust, also consisting mostly of silicate minerals, there was relatively low compositional variation among the samples, suggesting that the mineral sources have not changed dramatically over the past 100 years. The subtle variation in the EGRIP ice-core mineral composition is likely due to a minor contribution of local dust. The type of silicate minerals differed significantly between the two ice cores; micas and chlorite, which form in cold dry regions, were abundant in the EGRIP ice core, whereas kaolinite, which forms in warm humid regions, was abundant in the SIGMA-D ice core. This indicates that the EGRIP ice-core dust likely originated from different geological sources than those for the SIGMA-D dust. A back-trajectory analysis indicated that the ice-core dust was transported from Northern Eurasia and North America to the EGRIP site, and that the contribution from each source was likely smaller and larger, respectively, than those for the SIGMA-D ice core. Furthermore, the higher illite content in the EGRIP ice core suggests dust transportation from Asian deserts. Although the back-trajectory analysis suggests that most of the air mass that arrived at the EGRIP site came from the Greenland coast, the mineral grain size and composition results showed that the local dust contribution was likely small.

    DOI： 10.5194/egusphere-2023-1666

  2. Verification of Estimated Cosmic Neutron Intensities Using a Portable Neutron Monitoring System in Antarctica

    Yasuda H., Kurita N., Yajima K.

    Applied Sciences (Switzerland)   Vol. 13 ( 5 )   2023.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Applied Sciences (Switzerland)  

    Featured Application: A portable neutron-monitoring system can be effectively applied to verification of the models used for estimating cosmic radiation intensities over a wide range of altitudes in a harsh environment such as in Antarctica. Many ongoing studies for predicting the production rates of cosmogenic nuclides, forecasting changes of atmospheric compositions and climate, assessing the cosmic-radiation exposure of aircraft crew, and the effects on precise electronic devices use numerical models that estimate cosmic-radiation intensities in the atmosphere. Periodic verifications of those models are desirable to be performed for assuring the reliability of the study outcomes. Here, we investigated an application of a portable neutron-monitoring system composed of an extended-energy-range neutron monitor and a small data logger for monitoring of cosmic-neutron intensities in a polar region. As a result of measurements in the east Antarctica region covering a wide range of altitudes (from 30 m to 3762 m) and comparisons with the model calculations performed with an analytical model based on comprehensive Monte Carlo simulations (PARMA), it was demonstrated that the portable neutron-monitoring system could be effectively applied for periodic verification of cosmic-neutron intensities that would improve the reliability of related studies.

    DOI： 10.3390/app13053297

    Scopus

  3. Temporal variations of surface mass balance over the last 5000 years around Dome Fuji, Dronning Maud Land, East Antarctica

    Oyabu I., Kawamura K., Fujita S., Inoue R., Motoyama H., Fukui K., Hirabayashi M., Hoshina Y., Kurita N., Nakazawa F., Ohno H., Sugiura K., Suzuki T., Tsutaki S., Abe-Ouchi A., Niwano M., Parrenin F., Saito F., Yoshimori M.

    Climate of the Past   Vol. 19 ( 2 ) page： 293 - 321   2023.2

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Climate of the Past  

    We reconstructed surface mass balance (SMB) around Dome Fuji, Antarctica, over the last 5000 years using the data from 15 shallow ice cores and seven snow pits. The depth-age relationships for the ice cores were determined by synchronizing them with a layer-counted ice core from West Antarctica (WAIS Divide ice core) using volcanic signals. The reconstructed SMB records for the last 4000 years show spatial patterns that may be affected by their locations relative to the ice divides around Dome Fuji, proximity to the ocean, and wind direction. The SMB records from the individual ice cores and snow pits were stacked to reconstruct the SMB history in the Dome Fuji area. The stacked record exhibits a long-term decreasing trend at -0.037±0.005g€¯kgg€¯m-2 per century over the last 5000 years in the preindustrial period. The decreasing trend may be the result of long-term surface cooling over East Antarctica and the Southern Ocean and sea ice expansion in the water vapor source areas. The multidecadal to centennial variations of the Dome Fuji SMB after detrending the record shows four distinct periods during the last millennium: a mostly negative period before 1300g€¯CE, a slightly positive period from 1300 to 1450g€¯CE, a slightly negative period from 1450 to 1850g€¯CE with a weak maximum around 1600g€¯CE, and a strong increase after 1850g€¯CE. These variations are consistent with those of previously reconstructed SMB records in the East Antarctic plateau. The low accumulation rate periods tend to coincide with the combination of strong volcanic forcings and solar minima for the last 1000 years, but the correspondence is not clear for the older periods, possibly because of the lack of coincidence of volcanic and solar forcings or the deterioration of the SMB record due to a smaller number of stacked cores.

    DOI： 10.5194/cp-19-293-2023

    Scopus

  4. Seasonal changes in stable isotope ratio of water and tritium concentration of the Lena River discharge in eastern Siberia: Possibility of end-member mixing analysis to differentiate river water into several sources

    Hiyama Tetsuya, Homma Asaka, Kurita Naoyuki, Asai Kazuyoshi, Park Hotaek

    Proceeding of Annual Conference   Vol. 36 ( 0 ) page： 340   2023

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES  

    <p>The water cycle in northern Eurasia is drastically changing due to climate warming and Arctic sea ice retreat. To better understand the changing water cycle including permafrost thaw and groundwater discharge into sub-Arctic rivers, seasonal changes in stable water isotopes and tritium concentrations were obtained from April 2020 to March 2021 at the Tabaga hydrological station in the middle of the Lena River basin. Stable water isotopes and tritium concentration showed distinct seasonal variations relating with the water level. Interestingly, hysteresis was found between the stable isotope ratios and tritium concentrations. This implies contributions of groundwater (ground ice-melt water) and snow-melt water to the Lena River discharge differ with clear seasonality. Plotting end-member values of ground ice, groundwater, snow, and summer rain water showed that EMMA (end-member mixing analysis) could be applicable for detecting seasonal change of source waters to the Lena River discharge.</p>

    DOI： 10.11520/jshwr.36.0_340

    CiNii Research

  5. Spatial variations of <sup>10</sup>Be in surface snow along the inland traverse route of Japanese Antarctic Research Expeditions

    Horiuchi K., Kato S., Ohtani K., Kurita N., Tsutaki S., Nakazawa F., Motoyama H., Kawamura K., Tazoe H., Akata N., Yamagata T., Matsuzaki H.

    Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms   Vol. 533   page： 61 - 65   2022.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms  

    To contribute further to understanding of the nature of 10Be deposition in Antarctica, we determined 10Be concentrations in surface snow samples obtained along the inland traverse route of the 59th and 60th Japanese Antarctic Research Expeditions (JAREs) in eastern Dronning Maud Land. The 10Be concentrations ranged between 3.7 × 103 and 8.6 × 104 atoms/g. When plotted against latitude, they showed a clear trend of increasing concentration southward with an upward inflection point at around 75°S (elevation 3.5 km) for the 59th JARE. Comparison with both snow accumulation rate and δ18O data suggests that the inflection point divides the dominant deposition regime into two different groups: wet deposition (north of 75°S) and dry deposition with slight enhancement of 10Be fallout further inland (south of 75°S). Additional factors associated with 10Be transport from the stratosphere are also proposed.

    DOI： 10.1016/j.nimb.2022.10.018

    Scopus

  6. Monthly Precipitation Collected at Hirosaki, Japan: Its Tritium Concentration and Chemical and Stable Isotope Compositions

    Kuwata H., Akata N., Okada K., Tanaka M., Tazoe H., Kurita N., Otashiro N., Negami R., Suzuki T., Tamakuma Y., Shiroma Y., Hosoda M.

    Atmosphere   Vol. 13 ( 5 )   2022.5

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Atmosphere  

    Monthly precipitation samples were collected at Hirosaki, Aomori Prefecture from January 2018 to December 2020 to measure the ion species and stable hydrogen and oxygen isotope ratios in order to understand the regional properties. The tritium concentration ranged from 0.28 to 1.20 Bq/L, with mean values (±S.D.) of 0.52 ± 0.18, 0.67 ± 0.25 and 0.63 ± 0.21 Bq/L in 2018, 2019 and 2020, respectively. This concentration level was almost the same as for Rokkasho, Aomori Prefecture. The tritium concentration had clear seasonal variation: high in the spring and low in the summer. This trend was thought to arise from seasonal fluctuations in the atmospheric circulation. On the other hand, the pH tended to be low, and the electrical conductivity (EC) tended to be high from the winter to the spring. The ion components, which major ion species contained in sea salt, also tended to be high in the winter, and these components had a strong influence on EC. The d-excess values were high in the winter and low in the summer, and when this trend was considered from the viewpoint of the wind direction data in Hirosaki, these dust components were attributed to the northwest monsoon in the winter to the spring coming from the Asian continent.

    DOI： 10.3390/atmos13050848

    Scopus

  7. Comparison of Ventilated and Unventilated Air Temperature Measurements in Inland Dronning Maud Land on the East Antarctic Plateau

    Morino S., Kurita N., Hirasawa N., Motoyama H., Sugiura K., Lazzara M., Mikolajczyk D., Welhouse L., Keller L., Weidner G.

    Journal of Atmospheric and Oceanic Technology   Vol. 38 ( 12 ) page： 2061 - 2070   2021.12

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Journal of Atmospheric and Oceanic Technology  

    Surface temperature measurements with naturally ventilated (NV) sensors over the Antarctic Plateau are largely subject to systematic errors caused by solar radiative heating. Here we examined the radiative heating error in Dronning Maud Land on the East Antarctic Plateau using both the newly installed automatic weather stations (AWSs) at NDF and Relay Station and the existing AWSs at Relay Station and Dome Fuji. Two types of NV shields were used in these AWSs: a multiplate radiation shield and a simple cylinder-shaped shield. In austral summer, the temperature bias between the force-ventilated (FV) sensor and the NV sensor never reached zero because of continuous sunlight. The hourly mean temperature errors reached up to 8°C at noon on a sunny day with weak wind conditions. The errors increased linearly with increasing reflected shortwave radiation and decreased nonlinearly with increasing wind speed. These features were observed in both the multiplate and the cylinder-shaped shields. The magnitude of the errors of the multiplate shield was much larger than that of the cylinder-shaped shield. To quantify the radiative errors, we applied an existing correction model based on the regression approach and successfully reduced the errors by more than 70% after the correction. This indicates that we can use the corrected temperature data instead of quality controlled data, which removed warm bias during weak winds in inland Dronning Maud Land.

    DOI： 10.1175/JTECH-D-21-0107.1

    Scopus

  8. Isotope and chemical composition of monthly precipitation collected at Sapporo, northern part of Japan during 2015-2019

    Fusion Engineering and Design   Vol. 168   2021.7

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    Publishing type：Research paper (scientific journal)   Publisher：Fusion Engineering and Design  

    DOI： 10.1016/j.fusengdes.2021.112434

    Scopus

  9. Climate response of oxygen isotopic compositions in tree-ring cellulose in java: Evaluation using a proxy system model

    Atmosphere   Vol. 12 ( 3 )   2021.3

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    Publishing type：Research paper (scientific journal)   Publisher：Atmosphere  

    DOI： 10.3390/atmos12030310

    Scopus

  10. Temporal variations in Antarctic ice sheet surface accumulation observed with snow depth sensors in automatic weather stations Reviewed

    Naohiko Hirasawa, Hideaki Motoyama, Kyohei Yamada, Kounosuke Sugiura, Naoyuki Kurita

    SEPPYO   Vol. 83 ( 1 ) page： 67 - 77   2021.1

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    Authorship：Last author   Language：Japanese   Publishing type：Research paper (scientific journal)  

  11. Temporal variations in Antarctic ice sheet surface accumulation observed withsnow depthsensors in automatic weather stations

    HIRASAWA Naohiko, MOTOYAMA Hideaki, YAMADA Kyohei, SUGIURA Konosuke, KURITA Naoyuki

    Journal of the Japanese Society of Snow and Ice   Vol. 83 ( 1 ) page： 67 - 77   2021

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

    Automatic Weather Stations (AWSs) with ultrasonic snow depth sensors were newly installed at four sites. The installation was started in January 2016 and completed in October 2019. The sites are H128 in the coastal region, MD78 in the continental slope region with the katabatic wind, NRP in the inland high region on the upside of the continental slope, and NDF on the summit of the ice sheet. The purpose of this AWS system is to clarify the temporal variations of accumulations affected by synoptic-scale disturbances and diurnal variations while reflecting the regional characteristics over a wide area of the Antarctic ice sheet. This paper investigates the temporal variations of surface height observed at these four sites. The results are as follows: 1) The temporal changes of surface height include stepwise fluctuations and pulse-like fluctuations, and the rise in surface height is mainly caused by stepwise rises, rather than pulse-like fluctuations. 2) A comparison between H128 and NRP showed four cases in which surface height fluctuations appeared simultaneously over a wide area. The NOAA infrared image reveals that the cloud area associated with a synoptic-scale disturbance formed over the ice sheet. 3) The surface height is less likely to rise largely between different sites on the same day. 4) At the three sites other than NRP, a slow decline in surface height was observed during the warm season.

    DOI： 10.5331/seppyo.83.1_67

  12. Origin analysis of trace elements including arsenic in travertine springs in northwestern Iran

    Kaneko Masaki, Asahara Yoshihiro, Minami Masayo, Kurita Naoyuki, Azizi Hossein, Amin―Rasouli Hadi, Zhang Yubo

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 68 ( 0 ) page： 125   2021

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：GEOCHEMICAL SOCIETY OF JAPAN  

    <p></p>

    DOI： 10.14862/geochemproc.68.0_125

    CiNii Research

  13. Dating and solid particle analysis of a shallow ice core drilled at EGRIP, Greenland

    Komuro Yuki, Nakazawa Fumio, Goto-Azuma Kumiko, Hirabayashi Motohiro, Ogata Jun, Fukuda kaori, Kurita Naoyuki, Kitamura Kyotaro, Yonekura Ayaka, Popp Trevor J., Dahl-Jensen Dorthe

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research   Vol. 2021 ( 0 ) page： 22 - 22   2021

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    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japanese Society of Snow and Ice / Japan Society for Snow Engineering  

    DOI： 10.14851/jcsir.2021.0_22

    CiNii Research

  14. Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh.

    Ahmed N, N. Kurita, Chowdhury MAM, Gao J, Hassan SMQ, Mannan MA, Mallik MAK, Choudhury SA, Bhuiyan MAQ, Karim MM

    Isotopes in environmental and health studies   Vol. 56 ( 3 ) page： 220-237   2020.6

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

    DOI： 10.1080/10256016.2020.1770245

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    PubMed

  15. Isotopic and geochemical assessment of travertine springs in northwestern Iran

    Kaneko Masaki, Asahara Yoshihiro, Minami Masayo, Kurita Naoyuki, Azizi Hossein, Amin―Rasouli Hadi, Zhang Yubo

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 67 ( 0 )   2020

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    Publishing type：Research paper (scientific journal)   Publisher：GEOCHEMICAL SOCIETY OF JAPAN  

    <p></p>

    DOI： 10.14862/geochemproc.67.0_126

  16. Data Descriptor: Daily observations of stable isotope ratios of rainfall in the tropics.

    Scientific reports   Vol. 9 ( 1 ) page： 14419   2019.10

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

    DOI： 10.1038/s41598-019-50973-9

    Scopus

    PubMed

  17. Tritium, hydrogen and oxygen isotope compositions in monthly precipitation samples collected at toki, Japan

    Akata N.

    Radiation Protection Dosimetry   Vol. 184 ( 3-4 ) page： 338-341   2019.10

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

    DOI： 10.1093/rpd/ncz062

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  18. Deciphering key processes controlling rainfall isotopic variability during extreme tropical cyclones.

    Nature communications   Vol. 10 ( 1 ) page： 4321   2019.9

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

    DOI： 10.1038/s41467-019-12062-3

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  19. A global database of water vapor isotopes measured with high temporal resolution infrared laser spectroscopy.

    Scientific data   Vol. 6   page： 180302   2019.1

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

    DOI： 10.1038/sdata.2018.302

    PubMed

  20. Cellulose oxygen isotopic composition of teak (Tectona grandis) collected from Java Island: a tool for dendrochronological and dendroclimatological analysis

    Hisamochi R.

    Dendrochronologia   Vol. 52   page： 80-86   2018.12

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

    DOI： 10.1016/j.dendro.2018.09.010

    Scopus

  21. The isotopic signature of monsoon conditions, cloud modes, and rainfall type

    Zwart C.

    Hydrological Processes   Vol. 32 ( 15 ) page： 2296-2303   2018.7

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

    DOI： 10.1002/hyp.13140

    Scopus

  22. Interpretation of El Niño–Southern Oscillation-related precipitation anomalies in north-western Borneo using isotopic tracers

      Vol. 32 ( 14 ) page： 2176-2186   2018.7

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

    DOI： 10.1002/hyp.13164

    Scopus

  23. Stable Isotopes of Precipitation During Tropical Sumatra Squalls in Singapore

    He S.

    Journal of Geophysical Research: Atmospheres   Vol. 123 ( 7 ) page： 3812-3829   2018.4

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

    DOI： 10.1002/2017JD027829

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  24. Continuous measurements of stable isotopes of carbon dioxide and water vapour in an urban atmosphere: isotopic variations associated with meteorological conditions

    Wada Ryuichi, Matsumi Yutaka, Nakayama Tomoki, Hiyama Tetsuya, Fujiyoshi Yasushi, Kurita Naoyuki, Muramoto Kenichiro, Takanashi Satoru, Kodama Naomi, Takahashi Yoshiyuki

    ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES   Vol. 53 ( 6 ) page： 646-659   2017

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

    DOI： 10.1080/10256016.2017.1348351

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  25. In situ measurement of CO2 and water vapour isotopic compositions at a forest site using mid-infrared laser absorption spectroscopy

    Wada Ryuichi, Matsumi Yutaka, Takanashi Satoru, Nakai Yuichiro, Nakayama Tomoki, Ouchi Mai, Hiyama Tetsuya, Fujiyoshi Yasushi, Nakano Takashi, Kurita Naoyuki, Muramoto Kenichiro, Kodama Naomi

    ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES   Vol. 52 ( 6 ) page： 603-618   2016.12

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

    DOI： 10.1080/10256016.2016.1147441

    Web of Science

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  26. Stable isotopic signature of Australian monsoon controlled by regional convection

    Zwart C., Munksgaard N. C., Kurita N., Bird M. I.

    QUATERNARY SCIENCE REVIEWS   Vol. 151   page： 228-235   2016.11

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

    DOI： 10.1016/j.quascirev.2016.09.010

    Web of Science

    Scopus

  27. Analysis of the interdecadal variability of summer precipitation in central Japan using a reconstructed 106year long oxygen isotope record from tree ring cellulose

    Kurita Naoyuki, Nakatsuka Takeshi, Ohnishi Keiko, Mitsutani Takumi, Kumagai Tomo'omi

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 121 ( 20 ) page： 12089-12107   2016.10

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

    DOI： 10.1002/2016JD025463

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  28. Influence of large-scale atmospheric circulation on marine air intrusion toward the East Antarctic coast

    Kurita Naoyuki, Hirasawa Naohiko, Koga Seizi, Matsushita Junji, Steen-Larsen Hans Christian, Masson-Delmotte Valerie, Fujiyoshi Yasushi

    GEOPHYSICAL RESEARCH LETTERS   Vol. 43 ( 17 ) page： 9298-9305   2016.9

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

    DOI： 10.1002/2016GL070246

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  29. Identification of Air Masses Responsible for Warm Events on the East Antarctic Coast

    Kurita Naoyuki, Hirasawa Naohiko, Koga Seizi, Matsushita Junji, Steen-Larsen Hans Christian, Masson-Delmotte Valerie, Fujiyoshi Yasushi

    SOLA   Vol. 12 ( 0 ) page： 307-313   2016

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

    DOI： 10.2151/sola.2016-060

    Web of Science

  30. Development of remote sensing measurements for water vapor isotopic composition in volcanic fumarole

    Takahashi Koji, Tsunogai Urumu, Kurita Naoyuki, Nakagawa Fumiko

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 63 ( 0 )   2016

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    Language：Japanese  

    <p></p>

    DOI： 10.14862/geochemproc.63.0_218

  31. Intraseasonal Variability of delta O-18 of Precipitation over the Indonesian Maritime Continent Related to the Madden-Julian Oscillation

    Belgaman Halda A., Ichiyanagi Kimpei, Tanoue Masahiro, Suwarman Rusmawan, Yoshimura Kei, Mori Shuichi, Kurita Naoyuki, Yamanaka Manabu D., Syamsudin Fadli

    SOLA   Vol. 12 ( 0 ) page： 192-197   2016

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

    DOI： 10.2151/sola.2016-039

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  32. Moist processes during MJO events as diagnosed from water isotopicmeasurements fromthe IASI satellite

    Tuinenburg O.

    Journal of Geophysical Research   Vol. 120 ( 20 ) page： 10,619-10,636   2015.10

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

    DOI： 10.1002/2015JD023461

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  33. D/H isotope ratios in the global hydrologic cycle

    Good Stephen P., Noone David, Kurita Naoyuki, Benetti Marion, Bowen Gabriel J.

    GEOPHYSICAL RESEARCH LETTERS   Vol. 42 ( 12 ) page： 5042-5050   2015.6

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

    DOI： 10.1002/2015GL064117

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  34. Stable Isotope Anatomy of Tropical Cyclone Ita, North-Eastern Australia, April 2014

    Munksgaard Niels C., Zwart Costijn, Kurita Naoyuki, Bass Adrian, Nott Jon, Bird Michael I.

    PLOS ONE   Vol. 10 ( 3 ) page： e0119728   2015.3

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

    DOI： 10.1371/journal.pone.0119728

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  35. East Asian Monsoon controls on the inter-annual variability in precipitation isotope ratio in Japan

    Kurita N., Fujiyoshi Y., Nakayama T., Matsumi Y., Kitagawa H.

    CLIMATE OF THE PAST   Vol. 11 ( 2 ) page： 339-353   2015

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

    DOI： 10.5194/cp-11-339-2015

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  36. Isotopic variability of tree-ring cellulose in response to global climate change

    Kurita Naoyuki, Nakatsuka Takeshi

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 62 ( 0 )   2015

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    Language：Japanese  

    DOI： 10.14862/geochemproc.62.0_66

  37. Distribution of Oxygen Isotope Ratio of Precipitation in the Atlantic-Indian Sectors of the Southern Ocean

    Nakamura Kayo, Aoki Shigeru, Yoshimura Kei, Kurita Naoyuki

    SOLA   Vol. 10 ( 1 ) page： 154-157   2014

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

    DOI： 10.2151/sola.2014-032

    Web of Science

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  38. Atmospheric circulation controls on the inter-annual variability in precipitation isotope ratio in Japan

    Kurita Naoyuki

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 61 ( 0 )   2014

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    DOI： 10.14862/geochemproc.61.0_197

  39. To what extent could water isotopic measurements help us understand model biases in the water cycle over Western Siberia

    Gryazin V., Risi C., Jouzel J., Kurita N., Worden J., Frankenberg C., Bastrikov V., Gribanov K., Stukova O.

    ATMOSPHERIC CHEMISTRY AND PHYSICS   Vol. 14 ( 18 ) page： 9807-9830   2014

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    DOI： 10.5194/acp-14-9807-2014

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  40. Water isotopic variability in response to mesoscale convective system over the tropical ocean

    Kurita Naoyuki

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 118 ( 18 ) page： 10376-10390   2013.9

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    DOI： 10.1002/jgrd.50754

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  41. Isotopic Variations Associated with North-South Displacement of the Baiu Front

    Kurita Naoyuki, Fujiyoshi Yasushi, Wada Ryuichi, Nakayama Tomoki, Matsumi Yutaka, Hiyama Tetsuya, Muramoto Ken-ichiro

    SOLA   Vol. 9 ( 1 ) page： 187-190   2013

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    DOI： 10.2151/sola.2013-042

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  42. The Variability of Stable Isotopes and Water Origin of Precipitation over the Maritime Continent

    Suwarman Rusmawan, Ichiyanagi Kimpei, Tanoue Masahiro, Yoshimura Kei, Mori Shuichi, Yamanaka Manabu D., Kurita Naoyuki, Syamsudin Fadli

    SOLA   Vol. 9   page： 74-78   2013

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    DOI： 10.2151/sola.2013-017

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  43. Interannual variability of (H2O)-O-18 in precipitation over the Asian monsoon region

    Ishizaki Yasuhiro, Yoshimura Kei, Kanae Shinjiro, Kimoto Masahide, Kurita Naoyuki, Oki Taikan

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 117   2012.8

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    DOI： 10.1029/2011JD015890

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  44. Stable isotopes in global precipitation: A unified interpretation based on atmospheric moisture residence time

    Aggarwal Pradeep K., Alduchov Oleg A., Froehlich Klaus O., Araguas-Araguas Luis J., Sturchio Neil C., Kurita Naoyuki

    GEOPHYSICAL RESEARCH LETTERS   Vol. 39   2012.6

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    DOI： 10.1029/2012GL051937

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  45. Dancing to the Tune of the Glacial Cycles

    Kurita Naoyuki

    SCIENCE   Vol. 336 ( 6086 ) page： 1242-1243   2012.6

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    DOI： 10.1126/science.1223527

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  46. The moisture source sequence for the Madden-Julian Oscillation as derived from satellite retrievals of HDO and H2O

    Berkelhammer M., Risi C., Kurita N., Noone D. C.

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 117   2012.2

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    DOI： 10.1029/2011JD016803

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  47. Can oxygen isotope use as proxy for reconstruction of past precipitation amount?

    kurita naoyuki

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 59 ( 0 )   2012

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    DOI： 10.14862/geochemproc.59.0.200.0

  48. Evaluation of continuous water vapor delta D and delta O-18 measurements by off-axis integrated cavity output spectroscopy

    Kurita N., Newman B. D., Araguas-Araguas L. J., Aggarwal P.

    ATMOSPHERIC MEASUREMENT TECHNIQUES   Vol. 5 ( 8 ) page： 2069-2080   2012

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    DOI： 10.5194/amt-5-2069-2012

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  49. Characteristics of Seasonal Variation of Near-Surface Water Vapor D/H Isotope Ratio Revealed by Continuous in situ Measurement in Sapporo, Japan

    Sunmonu 'Niyi, Muramoto Ken-ichiro, Kurita Naoyuki, Yoshimura Kei, Fujiyoshi Yasushi

    SOLA   Vol. 8   2012

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    DOI： 10.2151/sola.2012-002

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  50. Intraseasonal isotopic variation associated with the Madden-Julian Oscillation

    Kurita Naoyuki, Noone David, Risi Camille, Schmidt Gavin A., Yamada Hiroyuki, Yoneyama Kunio

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 116 ( 24 )   2011.12

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    DOI： 10.1029/2010JD015209

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  51. Origin of Arctic water vapor during the ice-growth season

    Kurita Naoyuki

    GEOPHYSICAL RESEARCH LETTERS   Vol. 38   2011.1

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    DOI： 10.1029/2010GL046064

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  52. B104 レーザー分光法による大気CO_2および水蒸気の安定同位体比(^<13>C,^<18>O,D)の連続測定 : 名古屋における台風および前線通過時の同位体比変動(観測手法,一般口頭発表)

    竹村 匡弘, 和田 龍一, 中山 智喜, 松見 豊, 檜山 哲哉, 井上 元, 栗田 直幸, 藤吉 康志, 村本 健一郎

    大会講演予講集   Vol. 100   page： .   2011

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  53. P363 レーザ分光法を用いた水蒸気の安定同位体比の連続測定 : 札幌での短時間変動特性の季節変化と日本海での船上観測結果(ポスター・セッション)

    Sunmonu Niyi, 藤吉 康志, 栗田 直幸, 村本 健一郎

    大会講演予講集   Vol. 100   page： .   2011

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  54. B456 水同位体トレーサーを用いた気候モデルの再現性評価(気候システムV,一般口頭発表)

    栗田 直幸

    大会講演予講集   Vol. 97   page： .   2010

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  55. Reconstruction of the paleo-temperature in the last glacial maximum and the effect of the sea ice distribution: simulations using an isotopic general circulation model

    Ohgaito Rumi, Abe-Ouchi Ayako, Sueyoshi Tetsuo, Kurita Naoyuki

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 57 ( 0 ) page： 137-137   2010

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    DOI： 10.14862/geochemproc.57.0.137.0

  56. P335 同位体AGCMを用いた最終氷期最大期のグリーンランドに記録される酸素同位体比と海氷増減の影響(ポスター・セッション)

    大垣内 るみ, 阿部 彩子, 末吉 哲雄, 栗田 直幸

    大会講演予講集   Vol. 98   page： .   2010

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  57. The relationship between the isotopic content of precipitation and the precipitation amount in tropical regions

    Kurita Naoyuki, Ichiyanagi Kimpei, Matsumoto Jun, Yamanaka Manabu D., Ohata Tetsuo

    JOURNAL OF GEOCHEMICAL EXPLORATION   Vol. 102 ( 3 ) page： 113-122   2009.9

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    DOI： 10.1016/j.gexplo.2009.03.002

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  58. Surface freshening of the Canada Basin, 2003-2007: River runoff versus sea ice meltwater

    Yamamoto-Kawai M., McLaughlin F. A., Carmack E. C., Nishino S., Shimada K., Kurita N.

    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS   Vol. 114   2009.4

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    DOI： 10.1029/2008JC005000

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  59. A156 シベリア域の秋期降雪にみられる北極域水循環の変調(スペシャル・セッション「国際極年(IPY)2007-2008の成果と将来展望」II)

    栗田 直幸, 大畑 哲夫

    大会講演予講集   Vol. 96   page： .   2009

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  60. 大気大循環モデルによる氷期シミュレーションで得られた酸素同位体比-気温の関係

    大垣内 るみ, 阿部 彩子, 栗田 直幸

    日本地球化学会年会要旨集   Vol. 56 ( 0 ) page： 132-132   2009

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    氷床コアから気温復元を行う際、酸素同位体比d18Oと気温の線形関係が用いられてきたが、現在の観測で得られる係数と、時代の違いによる係数(temporal slope)に違いがあることがわかってきた。その要因の候補がいくつかあるが、詳しい解析はなされていない。本研究では、安定水同位体モデルを組み込んだMIROC 大気大循環モデルを用い、現在気候と最終氷期最大期(LGM)の気候条件を与えたシミュレーションを行った。海面水温、海氷は、MIROC大気海洋結合大循環モデルによって得られた結果を用いた。MIROCによる現在気候シミュレーションは、よく降水のd18O分布を表している。また、LGMと現在気候のd18O変化は、氷床コアの値と整合的である。この結果、temporal slopeは氷床上でも地域的な変化があることが示された。LGMでの、temporal slopeの違いに及ぼす影響を解析し発表する。

    DOI： 10.14862/geochemproc.56.0.132.0

  61. The role of local moisture recycling evaluated using stable isotope data from over the middle of the Tibetan Plateau during the monsoon season

    Kurita Naoyuki, Yamada Hiroyuki

    JOURNAL OF HYDROMETEOROLOGY   Vol. 9 ( 4 ) page： 760-775   2008.8

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    DOI： 10.1175/2007JHM945.1

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  62. Review and Perspective on the Water Cycle Processes using Stable Isotope of Water

    HIYAMA Tetsuya, ABE Osamu, KURITA Naoyuki, FUJITA Koji, IKEDA Kenichi, HASHIMOTO Shigemasa, TSUJIMURA Maki, YAMANAKA Tsutomu

    JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES   Vol. 21 ( 2 ) page： 158-176   2008.3

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    Important studies on water cycle processes using stable isotope of water were reviewed. The objective papers on the global-scale water cycle were studies including isotopic ratios of ocean surface water and those of water vapor over the ocean as well as studies on atmospheric circulations using AGCM (atmospheric general circulation model) with stable isotope of water. Regional-scale studies on runoff processes, evapotranspiration or vegetation-related processes, and meso-scale precipitation processes were also revisited. Additionally studies on the paleoclimate and cryospheric processes, which closely related to temporal variations of water cycle processes, were focused. Finally, perspectives on the water cycle study using stable isotope of water were summarized.

    DOI： 10.3178/jjshwr.21.158

  63. A311 アジアモンスーン域の降水の同位体分布と水循環の関係(気候システムIII)

    栗田 直幸

    大会講演予講集   Vol. 93   page： .   2008

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  64. Stable isotope variations in precipitation and moisture trajectories on the western Tibetan plateau, China

    Yu Wusheng, Yao Tandong, Tian Lide, Ma Yaoming, Kurita Naoyuki, Ichiyanagi Kimpei, Wang Yu, Sun Weizhen

    ARCTIC ANTARCTIC AND ALPINE RESEARCH   Vol. 39 ( 4 ) page： 688-693   2007.11

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  65. Stable isotope variations in precipitation and moisture trajectories on the western Tibetan plateau, China

    Yu Wusheng, Yao Tandong, Tian Lide, Ma Yaoming, Kurita Naoyuki, Ichiyanagi Kimpei, Wang Yu, Sun Weizhen

    ARCTIC ANTARCTIC AND ALPINE RESEARCH   Vol. 39 ( 4 ) page： 688-693   2007.11

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  66. C263 水の同位体循環モデルを用いた大陸水循環研究(降水システムIII)

    栗田 直幸

    大会講演予講集   Vol. 92   page： .   2007

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  67. C264 熱帯インド洋上で対流活発期にみられた降水の再循環(降水システムIII)

    栗田 直幸, 堀川 真由美, 米山 邦夫

    大会講演予講集   Vol. 92   page： .   2007

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  68. International Workshop on Isotopic Effects in Evaporation : Revisiting the Craig-Gordon Model Four Decades after its Formulation-参加報告

    芳村 圭, 藤田 耕史, 栗田 直幸, 阿部 理

    水文・水資源学会誌 = JOURNAL OF JAPAN SOCIETY OF HYDROLOGY & WATER RESOURCES   Vol. 19 ( 5 ) page： 420-423   2006.9

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  69. Report on the 2nd Atushi Numaguti Memorial Symposium, The Approach of the Hydrological Cycle Environmental Science

    KURITA Naoyuki, EMORI Seita, ENDO Takahiro, KANAE Sinjiro, SHINODA Taro, SUZUKI Kentaroh, HIGUCHI Atushi, YOSHIMURA Kei, WATANABE Masahiro

      Vol. 53 ( 10 ) page： 791-798   2006

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  70. 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   2005.9

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    DOI： 10.3178/jjshwr.18.531

  71. Isotopic composition and origin of snow over Siberia

    Kurita N, Sugimoto A, Fujii Y, Fukazawa T, Makarov VN, Watanabe O, Ichiyanagi K, Numaguti A, Yoshida N

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 110 ( D13 )   2005.7

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    DOI： 10.1029/2004JD005053

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  72. Basin-scale extrapolation of shipboard pCO(2) data by using satellite SST and Ch1a

    Ono T, Saino T, Kurita N, Sasaki K

    INTERNATIONAL JOURNAL OF REMOTE SENSING   Vol. 25 ( 19 ) page： 3803-3815   2004.10

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    DOI： 10.1080/01431160310001657515

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  73. An observation-based method for reconstructing ocean surface changes using a 340,000-year deuterium excess record from the Dome Fuji ice core, Antarctica

    Uemura R, Yoshida N, Kurita N, Nakawo M, Watanabe O

    GEOPHYSICAL RESEARCH LETTERS   Vol. 31 ( 13 )   2004.7

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    DOI： 10.1029/2004GL019954

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  74. Modern isotope climatology of Russia: A first assessment

    Kurita N, Yoshida N, Inoue G, Chayanova EA

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 109 ( D3 )   2004.2

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    DOI： 10.1029/2003JD003404

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  75. Oxygen and carbon isotopic ratios of tree-ring cellulose in a conifer-hardwood mixed forest in northern Japan

    Nakatsuka T, Ohnishi K, Hara T, Sumida A, Mitsuishi D, Kurita N, Uemura S

    GEOCHEMICAL JOURNAL   Vol. 38 ( 1 ) page： 77-88   2004

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  76. Oxygen and carbon isotopic ratios of tree-ring cellulose in a conifer-hardwood mixed forest in northern Japan

    Nakatsuka T, Ohnishi K, Hara T, Sumida A, Mitsuishi D, Kurita N, Uemura S

    GEOCHEMICAL JOURNAL   Vol. 38 ( 1 ) page： 77-88   2004

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  77. Relationship between the variation of isotopic ratios and the source of summer precipitation in eastern Siberia

    Kurita N, Numaguti A, Sugimoto A, Ichiyanagi K, Yoshida N

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 108 ( D11 )   2003.6

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    DOI： 10.1029/2001JD001359

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  78. Characteristics of soil moisture in permafrost observed in East Siberian taiga with stable isotopes of water

    Sugimoto A, Naito D, Yanagisawa N, Ichiyanagi K, Kurita N, Kubota J, Kotake T, Ohata T, Maximov TC, Fedorov AN

    HYDROLOGICAL PROCESSES   Vol. 17 ( 6 ) page： 1073-1092   2003.4

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

    DOI： 10.1002/hyp.1180

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  79. Seasonal variation in stable isotopic composition of alas lake water near Yakutsk, Eastern Siberia

    Ichiyanagi K, Sugimoto A, Numaguti A, Kurita N, Ishii Y, Ohata T

    GEOCHEMICAL JOURNAL   Vol. 37 ( 4 ) page： 519-530   2003

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  80. Seasonal variation in stable isotopic composition of alas lake water near Yakutsk, Eastern Siberia

    Ichiyanagi K, Sugimoto A, Numaguti A, Kurita N, Ishii Y, Ohata T

    GEOCHEMICAL JOURNAL   Vol. 37 ( 4 ) page： 519-530   2003

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To the head of Papers.▲

Books 2

  1. 昭和基地への海洋性気塊の流入メカニズム (南極氷床と大気物質循環・気候) -- (南極への大気・水・物質輸送)・気象研究ノート

    栗田直幸（ Role： Sole author）

    日本気象学会  2017.8 

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    Total pages：10   Language：Japanese

  2. 昭和基地における温暖イベントの発生メカニズム (南極氷床と大気物質循環・気候) -- (南極氷床上の水収支・物質輸送と大気循環)・気象研究ノート

    栗田直幸（ Role： Sole author）

    日本気象学会  2017.8 

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    Total pages：10   Language：Japanese

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MISC 7

  1. 2019 activity report on a regional contribution program of Nagoya University : "Let's study earthquake and active fault around Nagoya city"

    Minami Masayo, Sagiya Takeshi, Kozaka Yukiko, Kato Takenori, Wakasugi Yuki, Kitagawa Hiroyuki, Kurita Naoyuki, Yamane Masako, Nishida Masami, Sawada Hitoshi, Enami Masaki

      Vol. 4 ( 4 ) page： 76 - 83   2020.6

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    Language：Japanese  

    DOI： 10.18999/nagubc.4.76

  2. 2019年春季「極域・寒冷域研究連絡会」の報告 –南極の広域をより高い精度で観測する– Reviewed

        2019

  3. 2017 activity report on a regional contribution program conducted by Nagoya University: "Investigation of natural and environmental history in the Tokai region" for the higher grade elementary school students

    Minami Masayo, Kitagawa Hiroyuki, Yamada Kazuyoshi, Sugawara Daisuke, Kitamura Akihisa, Enami Masaki, Kato Takenori, Ikeda Akiko, Nara Fumiko, Kurita Naoyuki, Yamane Masako, Nishida Masami, Kida Risako, Nakamura Toshio

    名古屋大学年代測定研究   Vol. 2   page： 92 - 97   2018.3

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    Language：Japanese   Publisher：名古屋大学宇宙地球環境研究所  

    We, the members of the Division for Chronological Research at the Institute for Space-Earth Environmental Research at Nagoya University, held a regional contribution program for the higher grade elementary school students on August 3–4, 2017: &quot;Investigation of natural and environmental history in the Tokai region&quot;. Twenty-seven students observed natural samples to experience earth and archaeological sciences. The first day began with lectures on tephra chronology and dendrochronology. After the lecture, the students took part in several hands-on experiments by using tephra and annual tree rings. On the second day they travelled to Shizuoka by bus and visited the Museum of Natural and Environmental History, Shizuoka to study natural and environmental history in the Tokai region. Later in the day they went to Miho no Matsubara to observe the states of coastal erosion and pine wilt disease. Finally, they went to Nihondaira to study about a movement of the earth&#039;s crust. The program ended a success. The post-program questionnaire shows that the participants enjoyed the program and learned many new things.宇宙地球環境研究所年代測定研究部は，静岡県ふじのくに地球環境史ミュージアムの山田和芳教授，菅原大助准教授，静岡大学理学部の北村晃寿教授と協力し，平成29年8月3日（木）と4日（金）の2日間にわたり，小学高学年生27名を対象とした夏休み体験学習「東海の地球環境史を学ぼう」を行いました．教室での講義だけでは得られ難い実体験の機会は，子どもたちの科学への興味や関心をより高めるきっかけになり，本体験学習の目的は十分達成できたと考えられる．

  4. 平成28年度名古屋大学総長裁量経費 地域貢献事業「樹木年輪・年縞堆積物から過去の太陽活動，地球の古気候を探る」活動報告

    南 雅代, 北川淳子, 小島秀彰, 榎並正樹, 加藤丈典, 三宅芙沙, 池田晃子, 窪田 薫, 栗田直幸, 吉田澪代, 椋本ひかり, 藤沢純平, 徳丸 誠, 中村俊夫, 北川浩之

    名古屋大学年代測定研究報告   Vol. 1   page： 170-182   2017.3

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    Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

  5. 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)   Vol. 8th   page： WEB ONLY   2017

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    J-GLOBAL

  6. El-Nino Southern Oscillation Signal in Isotopic Precipitation during Rainy Seasons over Maritime Continent

    Rusmawan Suwarman, Kimpei Ichiyanagi, Kei Yoshimura, Manabu D. Yamanaka, Shuichi Mori, Naoyuki Kurita, Fadli Syamsud

    Extended Abstract of the Third International MAHASRI/HyARC Workshop on Asian Monsoon and Water Cycle     page： 363 - 376   2013

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    Language：English   Publishing type：Research paper, summary (international conference)  

  7. P423 海洋大陸での降水安定同位体比にみられた季節内変動

    堀川 真由美, 金森 大成, 栗田 直幸, 安成 哲三, 蔵治 光一郎

    大会講演予講集   Vol. 89   page： 449 - 449   2006

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    Language：Japanese   Publisher：日本気象学会  

    CiNii Books

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Presentations 1

  1. Application of tritium tracer technique to the partitioning between clear-sky and synoptic precipitation over the Antarctic Plateau International coauthorship International conference

    Naoyuki Kurita

    Symposium on Polar Science 2020  2020.12.3 

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    Language：English   Presentation type：Oral presentation (general)  

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KAKENHI (Grants-in-Aid for Scientific Research) 5

  1. 中赤外レーザーを用いた小型可搬型の同位体測定器の開発

    Grant number：22K18732  2022.6 - 2024.3

    科学研究費助成事業  挑戦的研究(萌芽)

    栗田 直幸, 戸野倉 賢一, 松見 豊, 安原 亮

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    Authorship：Principal investigator 

    Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）

    安定同位体測定は、レーザー分光法の登場により、実験室での分析から野外の現場測定に転換した。最近では、成層圏プラットホームや惑星探査機など新しい観測プラットホームが登場し、現場測定から遠隔監視への変革が期待されている。本研究では、最新の中赤外レーザー技術を活用してこのブレイクスルーに挑戦し、同位体測定装置の小型軽量化を実現する。中赤外領域の吸収強度は従来の近赤外領域よりも桁違いに高いため、分光セルの小型化、信号ノイズを低減する機構を簡素化できると期待できる。そして、簡便で高精度な同位体測定器の実現は、気象、水資源管理、火山噴火予測などの分野で大きな進展につながることが期待できる。

  2. Solar activity over the past 10,000 years

    Grant number：20H05643  2020.8 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

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    Authorship：Coinvestigator(s) 

  3. A revised interpretation of the relationship between d18O in snow and surface temperature over Antarctica

    Grant number：18K19851  2018.6 - 2021.3

    Grant-in-Aid for Challenging Research (Exploratory)

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    Authorship：Principal investigator 

    Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）

  4. A study of the mechanism of marine air intrusion toward the East Antarctica

    Grant number：25550022  2013.4 - 2016.3

    Kurita Naoyuki

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    Authorship：Principal investigator 

    Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）

    Recently, unusually high snowfall events, unprecedented for the past 60 years, have been observed in East Antarctica. Here we use shipboard observations of water vapor isotopologues along a ship track between Australia and Syowa on the East Antarctic coast, along with reanalysis data (ERA-Interim) to elucidate the mechanism by which large-scale circulations influences the marine air intrusions.
    Generally, marine air intrusions play an important role in delivering heavy snowfall in Antarctica. Isotopic variations while the ship was near Syowa reflect the contribution of marine moisture to the total moisture in the air. In the case when maritime air masses were dominant corresponded to a period when poleward moisture flow was enhanced by large-scale circulation. This result indicates that large-scale flows push marine air mass toward the inland across the Antarctic coast. Recent unusual snowfall events may therefore reflect the large-scale circulation changes over the Southern Hemisphere.

  5. 大循環モデルと安定同位体を用いたシベリアにおける大陸水循環に関する研究

    Grant number：16740276  2004 - 2005

    栗田 直幸

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    Authorship：Principal investigator 

    Grant amount：\3700000 （ Direct Cost: \3700000 ）

    研究実施計画書に基づき、行った研究実績を以下にまとめる。
    (1)水蒸気同位体観測法の確立
    当初使用予定だった商用の除湿器が製造中止になってしまった為に、今回汎用品の流用をあきらめ、新たに自動で水蒸気を簡便に採取できる装置の開発を行った。新方式では、密閉容器内を加圧し、飽和水蒸気を越えた水蒸気が凝結し、容器下部に凝結水が溜まる仕組みになっている。またこの新方式の採取装置で採取された水蒸気の同位体比が現実の値を再現しているか明らかにするために、同位体機知の水蒸気を発生させられる、水蒸気発生装置の開発も同時に行った。この水蒸気発生装置で生成された水蒸気を新方式の水蒸気補修装置で採取したところ、捕集した水蒸気の同位体比は、発生させたものと比較して同位体濃度が高くでることがわかり、回収率が100%でないことに起因する誤差があることが確認され、現在その誤差を補正する実験式を作成する作業を継続している。今回は採取装置の開発が遅れた為に、補助金支給期間内に装置を野外観測に応用するところまではできなかったが、汎用的な新しい装置そのものは完成させることができた。
    (2)シベリアにおける広域同位体観測ステーションの設置
    シベリアでの観測は、現地の情勢変化に実施が困難となったために、チベット高原において、大陸内部における水蒸気の同位体比変動観測を行った。現地観測は、2004年8月にチベット高原中部に位置する那曲で行い、地表付近の水蒸気を6時間毎に連続して2週間観測を行った。また、採取した水蒸気に地表面からの蒸発散水の寄与を調べるために地表面から蒸発する水蒸気を同時に採取した。まず観測された蒸発散水の同位体比は、午前から夕方に向かって徐々に同位体比が高くなる顕著な日変化を示すとともに,表層の土壌水分量の変化に応じた顕著な時系列変化を示した。この原因を調べるために、鉛直1次元の陸面モデルに同位体組み込んだモデル解析結果を使って調べたところ、大まかな変化は、降水の同位体比変化に応答していることが示された。また、さらに細かい変動では、蒸発と蒸散の寄与率変化に応じて同位体比が変化しており、同位体トレーサーは、蒸発と蒸散の比の時間変化を調べる非常によいトレーサーであることが今回の観測から明らかになった.(Kurita and Yoshimura, 2006)。次にこのような顕著な時間変化が観測された地表面FLUXの同位体比変動と、地表付近で観測された水蒸気の同位体比を比較したところ、水蒸気の同位体比は、蒸発散水の変動に応答した時系列変動を示しており、地表面で観測される水蒸気は、大規模な循環を反映したものというよりもむしろ局地的な影響を強くうけていることがわかった。昨年の解析では、降水と水蒸気の同位体比が一致していることから、水蒸気の同位体比変化は、大気循環場の変動を反映していると考えられたが、今回のモデル結果から、降水が蒸発散水の変動に大きく影響しているために、地表面の水蒸気の同位体比変化と降水の同位体比の変化が一致していることが明らかになり、大気循環変動を解釈するためには、より高々度において同位体観測を行う必要性が今回の観測から示された。
    (3)同位体大規模循環モデル結果の検証
    既存の同位体大循環モデルを最新版のCCSR/NIES/FRCGCに移植する作業を昨年度から引き続き行い、プログラムバグの修正等を引き続き行うことで、観測された同位体比の特徴を再現することが可能になった。最新の結果では、シベリア域で観測された内陸部に向かって夏期に降水の同位体比が徐々に減少するといった特徴を再現することが可能になり、この同位体比変動は、地表面から蒸発する水の同位体比の分布が同様に内陸に向かうにつれて軽くなることが原因であることがわかった。これは、西シベリアでは、一降水の同位体比の季節変化に応じて表層土壌水の同位体比が変化しているのに対し、東シベリアでは、夏期に降水する同位体比よりも、軽い同位体比をもった水が維持されることに起因している。つまり、東シベリアでは、夏期の土壌水分に、夏期降水よりも軽い同位体比をもつ融雪の寄与が残っており、この融雪水の寄与がシベリアにおける蒸発水の同位体分布を作り出していることが明らかになった。このように同位体モデルを使って観測値を再現することによって、これまで観測できなかった、夏期降水に対する融雪水の寄与を証明することが可能になった。

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Teaching Experience (On-campus) 3

  1. 大気水圏環境計測論

    2020

  2. 水の環境学

    2020

  3. Measurement of Atmospheric and Hydrospheric Environment

    2014

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