Faculty Profiles - FUJITA, Koji

Papers - FUJITA, Koji

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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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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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