Faculty Profiles - FUJITA, Koji

Papers - FUJITA, Koji

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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

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

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

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

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

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

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

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

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

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

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

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

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

Climate Change: Another Antarctic rhythm Invited

Fujita K

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

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

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

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

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

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.

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

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

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

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

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

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

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

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