研究者詳細 - 藤田　耕史

論文 - 藤田　耕史

分割表示 >> ／全件表示 217 件中 1 - 217 件目

Multidecadal Variability in Atmospheric Dust Preserved in an Ice Core From the Southern Slopes of the Himalayas 査読有り国際共著 Open Access

Esashi, N; Tsushima, A; Matoba, S; Iizuka, Y; Uemura, R; Kayastha, RB; Fujita, K

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 130 巻 ( 12 ) 頁： e2025JD043492 2025年6月

A 60-year atmospheric nitrate isotope record from a southeastern Greenland ice core with minimal postdepositional alteration 査読有り国際共著 Open Access

Wei, Z; Hattori, S; Tsuruta, A; Jiang, Z; Ishino, S; Fujita, K; Matoba, S; Geng, L; Lamothe, A; Uemura, R; Yoshida, N; Savarino, J; Iizuka, Y

ATMOSPHERIC CHEMISTRY AND PHYSICS 25 巻 ( 11 ) 頁： 5727 - 5742 2025年6月

Precipitation phase drives seasonal and decadal snowline changes in high mountain Asia 査読有り国際共著 Open Access

Bernat, M; Miles, ES; Kneib, M; Fujita, K; Sasaki, O; Shaw, TE; Pellicciotti, F

ENVIRONMENTAL RESEARCH LETTERS 20 巻 ( 6 ) 頁： 064039 2025年6月

Glacier meltwater contribution to river runoff in Western Mongolia 査読有り国際共著

Khalzan, P; Sadyrov, S; Sakai, A; Tanaka, K; Fujita, K

JOURNAL OF HYDROLOGY-REGIONAL STUDIES 59 巻頁： 102375 - 102375 2025年6月

Glacier preservation doubled by limiting warming to 1.5°C versus 2.7°C 査読有り国際共著

Zekollari, H; Schuster, L; Maussion, F; Hock, R; Marzeion, B; Rounce, DR; Compagno, L; Fujita, K; Huss, M; James, M; Kraaijenbrink, PDA; Lipscomb, WH; Minallah, S; Oberrauch, M; Van Tricht, L; Champollion, N; Edwards, T; Farinotti, D; Immerzeel, W; Leguy, G; Sakai, A

SCIENCE 388 巻 ( 6750 ) 頁： 979 - 983 2025年5月

Acidity-driven gas-particle partitioning of nitrate regulates its transport to Arctic through the industrial era 査読有り国際共著 Open Access

Iizuka, Y; Matsumoto, M; Kawakami, K; Sasage, M; Ishino, S; Hattori, S; Uemura, R; Matsui, H; Fujita, K; Oshima, N; Spolaor, A; Svensson, A; Vinther, BM; Ohno, H; Seki, O; Matoba, S

NATURE COMMUNICATIONS 16 巻 ( 1 ) 2025年5月

Modelling seasonal fluctuations and aspect characteristics of ice-cliff melt on the debris-covered Trakarding Glacier, Rolwaling Valley, Nepal Himalaya 査読有り国際共著 Open Access

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

JOURNAL OF GLACIOLOGY 71 巻頁： 1 - 36 2025年4月

Contrasting Responses of Ion Concentration Variations to Atmospheric Patterns in Central Himalayan Ice Cores 査読有り国際共著

Tsushima, A; Esashi, N; Matoba, S; Iizuka, Y; Uemura, R; Adachi, K; Kinase, T; Hirabayashi, M; Kawakami, K; Kayastha, RB; Fujita, K

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 130 巻 ( 2 ) 頁： e2024JD042392 2025年1月

High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years - Part 2: Seasonal and temporal trends in refractory black carbon originated from fossil fuel combustion and biomass burning 査読有り国際共著

Goto-Azuma, K; Ogawa-Tsukagawa, Y; Fukuda, K; Fujita, K; Hirabayashi, M; Dallmayr, R; Ogata, J; Moteki, N; Mori, T; Ohata, S; Kondo, Y; Koike, M; Matoba, S; Kadota, M; Tsushima, A; Nagatsuka, N; Aoki, T

ATMOSPHERIC CHEMISTRY AND PHYSICS 25 巻 ( 1 ) 頁： 657 - 683 2025年1月

Technical note: High-resolution analyses of concentrations and sizes of refractory black carbon particles deposited in northwestern Greenland over the past 350 years - Part 1: Continuous flow analysis of the SIGMA-D ice core using the wide-range Single-Particle Soot Photometer and a high-efficiency nebulizer 査読有り国際共著

Goto-Azuma, K; Dallmayr, R; Ogawa-Tsukagawa, Y; Moteki, N; Mori, T; Ohata, S; Kondo, Y; Koike, M; Hirabayashi, M; Ogata, J; Kitamura, K; Kawamura, K; Fujita, K; Matoba, S; Nagatsuka, N; Tsushima, A; Fukuda, K; Aoki, T

ATMOSPHERIC CHEMISTRY AND PHYSICS 24 巻 ( 22 ) 頁： 12985 - 13000 2024年11月

Quality Assessment of Multiple UAV-SfM DEMs Derived for Impact Assessment of a Co-Seismic Avalanche in the Himalayas 査読有り国際共著

Sunako, S; Fujita, K; Yamaguchi, S; Inoue, H; Immerzeel, WW; Izumi, T; Kayastha, RB

JOURNAL OF DISASTER RESEARCH 19 巻 ( 5 ) 頁： 865 - 873 2024年10月

Long-term relationships between summer clouds and aerosols over mid-high latitudes of the Northern Hemisphere 査読有り

Watari, A; Iizuka, Y; Fujita, K; Masunaga, H; Kawamoto, K

SCIENTIFIC REPORTS 14 巻 ( 1 ) 頁： 9059 2024年4月

Modelling runoff components and hydrological processes in glaciated catchments of the inner Tien-Shan, Kyrgyzstan 査読有り国際共著

Sadyrov, S; Tanaka, K; Satylkanov, R; Khujanazarov, T; Touge, Y; Fujita, K

FRONTIERS IN EARTH SCIENCE 11 巻頁： 1306476 2024年4月

Anthropogenic Influence on Tropospheric Reactive Bromine Since the Pre-industrial: Implications for Arctic Ice-Core Bromine Trends 査読有り国際共著

Zhai, ST; McConnell, JR; Chellman, N; Legrand, M; Opel, T; Meyer, H; Jaeglé, L; Confer, K; Fujita, K; Wang, X; Alexander, B

GEOPHYSICAL RESEARCH LETTERS 51 巻 ( 5 ) 頁： e2023GL107733 2024年3月

Foehn winds influence surface ablation on Glaciar Perito Moreno, southern Patagonian icefield 査読有り国際共著

Minowa, M; Skvarca, P; Fujita, K

JOURNAL OF GLACIOLOGY 70 巻頁： e40 2024年1月

Major metallic elements (Al, Ca, and Fe) and size distribution of mineral particles in recent snow in inland Northeast Greenland 査読有り国際共著

Komuro, Y; Nakazawa, F; Goto-azuma, K; Hirabayashi, M; Shigeyama, W; Fujita, K; Steffensen, JP; Dahl-jensen, D

BULLETIN OF GLACIOLOGICAL RESEARCH 42 巻頁： 49 - 60 2024年

Quality-controlled meteorological datasets from SIGMA automatic weather stations in northwest Greenland, 2012-2020 査読有り国際誌

Nishimura, M; Aoki, T; Niwano, M; Matoba, S; Tanikawa, T; Yamasaki, T; Yamaguchi, S; Fujita, K

EARTH SYSTEM SCIENCE DATA 15 巻 ( 11 ) 頁： 5207 - 5226 2023年11月

Implications of Snowpack Reactive Bromine Production for Arctic Ice Core Bromine Preservation 査読有り国際共著

Zhai, ST; Swanson, W; Mcconnell, JR; Chellman, N; Opel, T; Sigl, M; Meyer, H; Wang, X; Jaeglé, L; Stutz, J; Dibb, JE; Fujita, K; Alexander, B

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128 巻 ( 20 ) 頁： e2023JD039257 2023年10月

SE-Dome II Ice Core Dating With Half-Year Precision: Increasing Melting Events From 1799 to 2020 in Southeastern Greenland 査読有り

Kawakami, K; Iizuka, Y; Sasage, M; Matsumoto, M; Saito, T; Hori, A; Ishino, S; Fujita, S; Fujita, K; Takasugi, K; Hatakeyama, 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

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 128 巻 ( 20 ) 頁： e2023JD038874 2023年10月

Land Surface Modeling in the Himalayas: On the Importance of Evaporative Fluxes for the Water Balance of a High-Elevation Catchment 査読有り国際共著

Buri, P; Fatichi, S; Shaw, TE; Miles, ES; Mccarthy, MJ; Fyffe, CL; Fugger, S; Ren, ST; Kneib, M; Jouberton, A; Steiner, J; Fujita, K; Pellicciotti, F

WATER RESOURCES RESEARCH 59 巻 ( 10 ) 頁： e2022WR033841 2023年10月

Modelling the development and decay of cryoconite holes in northwestern Greenland 査読有り

Onuma, Y; Fujita, K; Takeuchi, N; Niwano, M; Aoki, T

CRYOSPHERE 17 巻 ( 8 ) 頁： 3309 - 3328 2023年8月

A long-term mass-balance reconstruction (1974-2021) and a decadal in situ mass-balance record (2011-2021) of Rikha Samba Glacier, central Himalaya 査読有り国際共著

Gurung, TR; Kayastha, RB; Fujita, K; Joshi, SP; Sinisalo, A; Kirkham, JD

JOURNAL OF GLACIOLOGY 69 巻 ( 276 ) 頁： 723 - 736 2023年8月

AsiaPEX Challenges and Prospects in Asian Precipitation Research 査読有り国際共著

Terao, T; Kanae, S; Fujinami, H; Das, S; Dimri, AP; Dutta, S; Fujita, K; Fukushima, A; Ha, KJ; Hirose, M; Hong, J; Kamimera, H; Kayastha, RB; Kiguchi, M; Kikuchi, K; Kim, HM; Kitoh, A; Kubota, H; Ma, WQ; Ma, YM; Mujumdar, M; Nodzu, MI; Sato, T; Su, Z; Sugimoto, S; Takahashi, HG; Takaya, Y; Wang, SY; Yang, K; Yokoi, S; van Oevelen, P; Matsumoto, J

BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY 104 巻 ( 4 ) 頁： E884 - E908 2023年4月

Up-glacier propagation of surface lowering of Yala Glacier, Langtang Valley, Nepal Himalaya 査読有り国際共著

Sunako, S; Fujita, K; Izumi, T; Yamaguchi, S; Sakai, A; Kayastha, RB

JOURNAL OF GLACIOLOGY 69 巻 ( 274 ) 頁： 425 - 432 2023年4月

Multiscale Processes Leading to Heavy Precipitation in the Eastern Nepal Himalayas 査読有り国際共著

Hirata, H; Fujinami, H; Kanamori, H; Sato, Y; Kato, M; Kayastha, RB; Shrestha, ML; Fujita, K

JOURNAL OF HYDROMETEOROLOGY 24 巻 ( 4 ) 頁： 641 - 658 2023年4月

Evolution of snow algae, from cosmopolitans to endemics, revealed by DNA analysis of ancient ice 査読有り国際共著国際誌

Segawa, T; Yonezawa, T; Matsuzaki, R; Mori, H; Akiyoshi, A; Navarro, F; Fujita, K; Aizen, VB; Li, ZQ; Mano, S; Takeuchi, N

ISME JOURNAL 17 巻 ( 4 ) 頁： 491 - 501 2023年4月

A WIGGLE-MATCHED 297-YR TREE-RING OXYGEN ISOTOPE RECORD FROM THAILAND: INVESTIGATING THE 14C OFFSET INDUCED BY AIR MASS TRANSPORT FROM THE INDIAN OCEAN 査読有り国際共著

Sano, M; Pumijumnong, N; Fujita, K; Hakozaki, M; Miyake, F; Nakatsuka, T

RADIOCARBON 65 巻 ( 2 ) 頁： 505 - 519 2023年4月

Climate and Surface Mass Balance at Glaciar Perito Moreno, Southern Patagonia 査読有り国際共著

Minowa, M; Skvarca, P; Fujita, K

JOURNAL OF CLIMATE 36 巻 ( 2 ) 頁： 625 - 641 2023年1月

Increased oceanic dimethyl sulfide emissions in areas of sea ice retreat inferred from a Greenland ice core 査読有り

Kurosaki, Y; Matoba, S; Iizuka, Y; Fujita, K; Shimada, R

COMMUNICATIONS EARTH & ENVIRONMENT 3 巻 ( 1 ) 頁： 327 2022年12月

Multi-decadal monsoon characteristics and glacier response in High Mountain Asia 査読有り国際共著

Shaw, TE; Miles, ES; Chen, D; Jouberton, A; Kneib, M; Fugger, S; Ou, T; Lai, HW; Fujita, K; Yang, W; Fatichi, S; Pellicciotti, F

ENVIRONMENTAL RESEARCH LETTERS 17 巻 ( 10 ) 頁： 104001 - 104001 2022年10月

Editorial: Debris-covered glaciers: Formation, governing processes, present status and future directions 招待有り国際共著

Shukla, A; Nicholson, L; Banerjee, A; Fujita, K; Quincey, DJ

FRONTIERS IN EARTH SCIENCE 10 巻 2022年9月

Land- to lake-terminating transition triggers dynamic thinning of a Bhutanese glacier 査読有り国際共著

Sato, Y; Fujita, K; Inoue, H; Sakai, A; Karma

CRYOSPHERE 16 巻 ( 6 ) 頁： 2643 - 2654 2022年7月

Mass Balance of Four Mongolian Glaciers: In-situ Measurements, Long-Term Reconstruction and Sensitivity Analysis 査読有り国際共著国際誌

Khalzan, P; Sakai, A; Fujita, K

FRONTIERS IN EARTH SCIENCE 9 巻頁： 785306 2022年1月

Soluble salts in deserts as a source of sulfate aerosols in an Antarctic ice core during the last glacial period 査読有り国際誌

Uemura, R; Masaka, K; Iizuka, Y; Hirabayashi, M; Matsui, H; Matsumoto, R; Uemura, M; Fujita, K; Motoyama, H

EARTH AND PLANETARY SCIENCE LETTERS 578 巻頁： 117299 - 117299 2022年1月

Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya 査読有り国際共著国際誌

Tsushima, A; Miyahara, M; Yamasaki, T; Esashi, N; Sato, Y; Kayastha, RB; Sherpa, AJBL; Sano, M; Fujita, K

ANNALS OF GLACIOLOGY 62 巻 ( 85-86 ) 頁： 353 - 359 2021年9月

Anthropogenic Impacts on Tropospheric Reactive Chlorine Since the Preindustrial 査読有り国際共著国際誌

Zhai, ST; Wang, X; McConnell, JR; Geng, L; Cole-Dai, J; Sigl, M; Chellman, N; Sherwen, T; Pound, R; Fujita, K; Hattori, S; Moch, JM; Zhu, L; Evans, M; Legrand, M; Liu, PF; Pasteris, D; Chan, YC; Murray, LT; Alexander, B

GEOPHYSICAL RESEARCH LETTERS 48 巻 ( 14 ) 頁： e2021GL093808 2021年7月

Twice-Daily Monsoon Precipitation Maxima in the Himalayas Driven by Land Surface Effects 査読有り国際共著国際誌

Fujinami, H; Fujita, K; Takahashi, N; Sato, T; Kanamori, H; Sunako, S; Kayastha, RB

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126 巻 ( 13 ) 2021年7月

Physically Based Summer Temperature Reconstruction From Melt Layers in Ice Cores 査読有り国際誌 Open Access

Fujita, K; Matoba, S; Iizuka, Y; Takeuchi, N; Tsushima, A; Kurosaki, Y; Aoki, T

EARTH AND SPACE SCIENCE 8 巻 ( 7 ) 2021年7月

Variations in mineralogy of dust in an ice core obtained from northwestern Greenland over the past 100 years 査読有り国際共著国際誌 Open Access

Nagatsuka, N; Goto-Azuma, K; Tsushima, A; Fujita, K; Matoba, S; Onuma, Y; Dallmayr, R; Kadota, M; Hirabayashi, M; Ogata, J; Ogawa-Tsukagawa, Y; Kitamura, K; Minowa, M; Komuro, Y; Motoyama, H; Aoki, T

CLIMATE OF THE PAST 17 巻 ( 3 ) 頁： 1341 - 1362 2021年6月

Ice Cliff Dynamics of Debris-Covered Trakarding Glacier in the Rolwaling Region, Nepal Himalaya 査読有り国際共著国際誌 Open Access

Sato, Y; Fujita, K; Inoue, H; Sunako, S; Sakai, A; Tsushima, A; Podolskiy, EA; Kayastha, R; Kayastha, RB

FRONTIERS IN EARTH SCIENCE 9 巻 2021年6月

Projected land ice contributions to twenty-first-century sea level rise 査読有り国際共著国際誌

Edwards, TL; Nowicki, S; Marzeion, B; Hock, R; Goelzer, H; Seroussi, H; Jourdain, NC; Slater, DA; Turner, FE; Smith, CJ; McKenna, CM; Simon, E; Abe-Ouchi, A; Gregory, JM; Larour, E; Lipscomb, WH; Payne, AJ; Shepherd, A; Agosta, C; Alexander, P; Albrecht, T; Anderson, B; Asay-Davis, X; Aschwanden, A; Barthel, A; Bliss, A; Calov, R; Chambers, C; Champollion, N; Choi, Y; Cullather, R; Cuzzone, J; Dumas, C; Felikson, D; Fettweis, X; Fujita, K; Galton-Fenzi, BK; Gladstone, R; Golledge, NR; Greve, R; Hattermann, T; Hoffman, MJ; Humbert, A; Huss, M; Huybrechts, P; Immerzeel, W; Kleiner, T; Kraaijenbrink, P; Le Clec'h, S; Lee, VC; Leguy, GR; Little, CM; Lowry, DP; Malles, JH; Martin, DF; Maussion, F; Morlighem, M; O'Neill, JF; Nias, I; Pattyn, F; Pelle, T; Price, SF; Quiquet, A; Radic, V; Reese, R; Rounce, DR; Rückamp, M; Sakai, A; Shafer, C; Schlegel, NJ; Shannon, S; Smith, RS; Straneo, F; Sun, SN; Tarasov, L; Trusel, LD; Van Breedam, J; van de Wal, R; van den Broeke, M; Winkelmann, R; Zekollari, H; Zhao, C; Zhang, T; Zwinger, T

NATURE 593 巻 ( 7857 ) 頁： 74 - + 2021年5月

Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control 査読有り国際共著国際誌 Open Access

Hattori, S; Iizuka, Y; Alexander, B; Ishino, S; Fujita, K; Zhai, ST; Sherwen, T; Oshima, N; Uemura, R; Yamada, A; Suzuki, N; Matoba, S; Tsuruta, A; Savarino, J; Yoshida, N

SCIENCE ADVANCES 7 巻 ( 19 ) 頁： eabd4610 - eabd4610 2021年5月

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 -. 査読有り

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 83 巻 ( 2 ) 頁： 169 - 191 2021年3月

Increasing dust emission from ice free terrain in southeastern Greenland since 2000 査読有り国際誌

Amino, T; Iizuka, Y; Matoba, S; Shimada, R; Oshima, N; Suzuki, T; Ando, T; Aoki, T; Fujita, K

POLAR SCIENCE 27 巻頁： 100599 - 100599 2021年3月

雪氷 : journal of the Japanese Society of Snow and Ice 83 巻 ( 2 ) 頁： 169 - 191 2021年3月

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. 査読有り

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 83 巻 ( 1 ) 頁： 27 - 50 2021年1月

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

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 83 巻 ( 1 ) 2021年

Ice Core Drilling and the Related Observations at SE-Dome site, southeastern Greenland Ice Sheet 査読有り

Iizuka, Y; Matoba, S; Minowa, M; Yamasaki, T; Kawakami, K; Kakugo, A; Miyahara, M; Hashimoto, A; Niwano, M; Tanikawa, T; Fujita, K; Aoki, T

BULLETIN OF GLACIOLOGICAL RESEARCH 39 巻頁： 1 - 12 2021年

南極ドームふじ基地における第2 期氷床深層コア掘削査読有り国際共著

本山秀明, 高橋昭好, 田中洋一, 新堀邦夫, 宮原盛厚, 吉本隆安, 藤井理行, 鈴木利孝, 古川晶雄, 東久美子, 鈴木啓助, 武藤淳公, 五十嵐誠, 山崎哲秀, 藤田秀二, 斎藤健, 渡辺原太, 古崎睦, 李院生, 鄭址雄, 福井幸太郎, 中澤文男, 亀田貴雄, 藤田耕史, 大日方一夫, 齊藤隆志, 神山孝吉, 木下淳, 東信彦, 中山芳樹, 渡辺興亜, 高田守昌, 小澤行雄, 小林明雄, 吉瀬也寸志

南極資料 64 巻 ( 64 ) 頁： 284 - 329 2020年12月

記述言語：日本語掲載種別：研究論文（大学，研究機関等紀要）出版者・発行元：国立極地研究所

南極ドームふじ基地において，第2 期氷床深層コア掘削が行われた．2001 年のパイロット孔掘削に引き続き2003/2004 シーズンから4 か年にわたり本格的な深層コア掘削を実施し，2007 年1 月に3035.22 m 深に達した．夏期間のみの掘削としたので，効率よく掘削できるように第1 期深層コア掘削システムの問題点を解決しながら多くの改良を施した．特に1 回の掘削で採取可能なコア長を2.3 m から3.84 m にしたことと切削チップ収納効率を高めたことが大きい．本報告では，現地で使用した掘削システムの概要とともに，掘削の方法，掘削の経過を述べるとともに，掘削中に生じた様々なトラブルについても報告し，併せて今後の課題を示した． The second deep ice coring project was carried out at Dome Fuji, Antarctica. Following the pilot hole drilling in 2001, deep ice core drilling was conducted for four years from the 2003/2004 austral summer season, reaching a depth of 3035.22 m in January 2007. The drilling was performed only in the summer season. Therefore, many improvements were made to the problems of the first deep ice core drilling system to enable efficient drilling. In particular, the core length that can be obtained at one time was increased from 2.3m to 3.84 m, and the chip storage efficiency was enhanced. In this report, the outline of the drilling system, the method of drilling, the progress of drilling operation, and various troubles were reported. Also, future issues are indicated.

DOI： 10.15094/00016228

CiNii Books

GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet 査読有り国際共著国際誌

Fettweis, X; Hofer, S; Krebs-Kanzow, U; Amory, C; Aoki, T; Berends, CJ; Born, A; Box, JE; Delhasse, A; Fujita, K; Gierz, P; Goelzer, H; Hanna, E; Hashimoto, A; Huybrechts, P; Kapsch, ML; King, MD; Kittel, C; Lang, C; Langen, PL; Lenaerts, JTM; Liston, GE; Lohmann, G; Mernild, SH; Mikolajewicz, U; Modali, K; Mottram, RH; Niwano, M; Noël, B; Ryan, JC; Smith, A; Streffing, J; Tedesco, M; van de Berg, WJ; van den Broeke, M; van de Wal, RSW; van Kampenhout, L; Wilton, D; Wouters, B; Ziemen, F; Zolles, T

CRYOSPHERE 14 巻 ( 11 ) 頁： 3935 - 3958 2020年11月

Partitioning the Uncertainty of Ensemble Projections of Global Glacier Mass Change 査読有り国際共著国際誌

Marzeion, B; Hock, R; Anderson, B; Bliss, A; Champollion, N; Fujita, K; Huss, M; Immerzeel, WW; Kraaijenbrink, P; Malles, JH; Maussion, F; Radic, V; Rounce, DR; Sakai, A; Shannon, S; van de Wal, R; Zekollari, H

EARTHS FUTURE 8 巻 ( 7 ) 頁： e2019EF001470 2020年7月

The influence of water percolation through crevasses on the thermal regime of a Himalayan mountain glacier 査読有り国際共著国際誌

Gilbert, A; Sinisalo, A; Gurung, TR; Fujita, K; Maharjan, SB; Sherpa, TC; Fukuda, T

CRYOSPHERE 14 巻 ( 4 ) 頁： 1273 - 1288 2020年4月

Contrasting thinning patterns between lake- and land-terminating glaciers in the Bhutanese Himalaya 査読有り国際共著国際誌 Open Access

Tsutaki, S; Fujita, K; Nuimura, T; Sakai, A; Sugiyama, S; Komori, J; Tshering, P

CRYOSPHERE 13 巻 ( 10 ) 頁： 2733 - 2750 2019年10月

Mass balance of Trambau Glacier, Rolwaling region, Nepal Himalaya: in-situ observations, long-term reconstruction and mass-balance sensitivity 査読有り国際共著国際誌 Open Access

Sunako, S; Fujita, K; Sakai, A; Kayastha, RB

JOURNAL OF GLACIOLOGY 65 巻 ( 252 ) 頁： 605 - 616 2019年8月

Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials 査読有り国際誌 Open Access

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 10 巻 ( 1 ) 頁： 324 2019年7月

Influence of Summer Sublimation on δD, δ18O, and δ17O in Precipitation, East Antarctica, and Implications for Climate Reconstruction From Ice Cores 査読有り国際共著国際誌

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 124 巻 ( 13 ) 頁： 7339 - 7358 2019年7月

Viscoelastic Modeling of Nocturnal Thermal Fracturing in a Himalayan Debris-Covered Glacier 査読有り国際共著国際誌

Podolskiy, EA; Fujita, K; Sunako, S; Sato, Y

JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 124 巻 ( 6 ) 頁： 1485 - 1515 2019年6月

Simulations of black carbon (BC) aerosol impact over Hindu Kush Himalayan sites: validation, sources, and implications on glacier runoff 査読有り国際共著

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

ATMOSPHERIC CHEMISTRY AND PHYSICS 19 巻 ( 4 ) 頁： 2441 - 2460 2019年2月

Assessment for paleoclimatic utility of biomass burning tracers in SE-Dome ice core, Greenland 査読有り国際共著 Open Access

Parvin, F; Seki, O; Fujita, K; Iizuka, Y; Matoba, S; Ando, T; Sawada, K

ATMOSPHERIC ENVIRONMENT 196 巻頁： 86 - 94 2019年1月

Annual layer counting using pollen grains of the Grigoriev ice core from the Tien Shan Mountains, central Asia 査読有り国際共著国際誌 Open Access

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

ARCTIC ANTARCTIC AND ALPINE RESEARCH 51 巻 ( 1 ) 頁： 299 - 312 2019年

Status and Change of the Cryosphere in the Extended Hindu Kush Himalaya Region 招待有り査読有り国際共著

Bolch, T; Shea, JM; Liu, SY; Azam, FM; Gao, Y; Gruber, S; Immerzeel, WW; Kulkarni, A; Li, HL; Tahir, AA; Zhang, GQ; Zhang, YS; Bannerjee, A; Berthier, E; Brun, F; Kääb, A; Kraaijenbrink, P; Moholdt, G; Nicholson, L; Pepin, N; Racoviteanu, A; Fujita, K

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

Nocturnal Thermal Fracturing of a Himalayan Debris-Covered Glacier Revealed by Ambient Seismic Noise 査読有り国際共著

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

GEOPHYSICAL RESEARCH LETTERS 45 巻 ( 18 ) 頁： 9699 - 9709 2018年9月

Demographic analysis of cyanobacteria based on the mutation rates estimated from an ancient ice core 査読有り国際共著 Open Access

Segawa, T; Takeuchi, N; Fujita, K; Aizen, VB; Willerslev, E; Yonezawa, T

HEREDITY 120 巻 ( 6 ) 頁： 562 - 573 2018年6月

Use of Water Balance and Tracer-Based Approaches to Monitor Groundwater Recharge in the Hyper-Arid Gobi Desert of Northwestern China 査読有り国際共著

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

Environments 5 巻 ( 5 ) 頁： 55 - 15 2018年5月

Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years 査読有り国際共著 Open Access

Uemura, R; Motoyama, H; Masson-Delmotte, V; Jouzel, J; Kawamura, K; Goto-Azuma, K; Fujita, S; Kuramoto, T; Hirabayashi, M; Miyake, T; Ohno, H; Fujita, K; Abe-Ouchi, A; Iizuka, Y; Horikawa, S; Igarashi, M; Suzuki, K; Suzuki, T; Fujii, Y

NATURE COMMUNICATIONS 9 巻 ( 1 ) 頁： 961 2018年3月

NHM-SMAP: spatially and temporally high-resolution nonhydrostatic atmospheric model coupled with detailed snow process model for Greenland Ice Sheet 査読有り Open Access

Niwano, M; Aoki, T; Hashimoto, A; Matoba, S; Yamaguchi, S; Tanikawa, T; Fujita, K; Tsushima, A; Iizuka, Y; Shimada, R; Hori, M

CRYOSPHERE 12 巻 ( 2 ) 頁： 635 - 655 2018年2月

Review of the status and mass changes of Himalayan-Karakoram glaciers 査読有り国際共著 Open Access

Azam, MF; Wagnon, P; Berthier, E; Vincent, C; Fujita, K; Kargel, JS

JOURNAL OF GLACIOLOGY 64 巻 ( 243 ) 頁： 61 - 74 2018年2月

A 60Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland 査読有り Open Access

Iizuka, Y; Uemura, R; Fujita, K; Hattori, S; Seki, O; Miyamoto, C; Suzuki, T; Yoshida, N; Motoyama, H; Matoba, S

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123 巻 ( 1 ) 頁： 574 - 589 2018年1月

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 査読有り Open Access

Lamsal, D; Fujita, K; Sakai, A

CRYOSPHERE 11 巻 ( 6 ) 頁： 2815 - 2827 2017年12月

Seasonal-Scale Dating of a Shallow Ice Core From Greenland Using Oxygen Isotope Matching Between Data and Simulation 査読有り Open Access

Furukawa, R; Uemura, R; Fujita, K; Sjolte, J; Yoshimura, K; Matoba, S; Iizuka, Y

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122 巻 ( 20 ) 頁： 10873 - 10887 2017年10月

Contrasting glacier responses to recent climate change in high-mountain Asia 査読有り Open Access

Sakai, A; Fujita, K

SCIENTIFIC REPORTS 7 巻 ( 1 ) 頁： 13717 2017年10月

Downwasting of the debris-covered area of Lirung Glacier in Langtang Valley, Nepal Himalaya, from 1974 to 2010 査読有り Open Access

Nuimura, T; Fujita, K; Sakai, A

QUATERNARY INTERNATIONAL 455 巻頁： 93 - 101 2017年10月

Topographic controls on the debris-cover extent of glaciers in the Eastern Himalayas: Regional analysis using a novel high-resolution glacier inventory 査読有り

Ojha, S; Fujita, K; Sakai, A; Nagai, H; Lamsal, D

QUATERNARY INTERNATIONAL 455 巻頁： 82 - 92 2017年10月

Evaluating the Scale and Potential of GLOF in the Bhutan Himalayas Using a Satellite-Based Integral Glacier–Glacial Lake Inventory 査読有り

Nagai H, Ukita J, Narama C, Fujita K, Sakai A, Tadono T, Yamanokuchi T, Tomiyama N

Geosciences 7 巻 ( 3 ) 頁： 77 2017年9月

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

Salerno, F; Thakuri, S; Tartari, G; Nnimura, T; Sunako, S; Sakai, A; Fujita, K

EARTH AND PLANETARY SCIENCE LETTERS 471 巻頁： 19 - 31 2017年8月

Anomalous winter-snow-amplified earthquake-induced disaster of the 2015 Langtang avalanche in Nepal 査読有り Open Access

Fujita, K; Inoue, H; Izumi, T; Yamaguchi, S; Sadakane, A; Sunako, S; Nishimura, K; Immerzeel, W; Shea, JM; Kayastha, RB; Sawagaki, T; Breashears, DF; Yagi, H; Sakai, A

NATURAL HAZARDS AND EARTH SYSTEM SCIENCES 17 巻 ( 5 ) 頁： 749 - 764 2017年5月

State dependence of climatic instability over the past 720,000 years from Antarctic ice cores and climate modeling 査読有り Open Access

Kawamura, K; Abe-Ouchi, A; Motoyama, H; Ageta, Y; Aoki, S; Azuma, N; Fujii, Y; Fujita, K; Fujita, S; Fukui, K; Furukawa, T; Furusaki, A; Goto-Azuma, K; Greve, R; Hirabayashi, M; Hondoh, T; Hori, A; Horikawa, S; Horiuchi, K; Igarashi, M; Iizuka, Y; Kameda, T; Kanda, H; Kohno, M; Kuramoto, T; Matsushi, Y; Miyahara, M; Miyake, T; Miyamoto, A; Nagashima, Y; Nakayama, Y; Nakazawa, T; Nakazawa, F; Nishio, F; Obinata, I; Ohgaito, R; Oka, A; Okuno, J; Okuyama, J; Oyabu, I; Parrenin, F; Pattyn, F; Saito, F; Saito, T; Saito, T; Sakurai, T; Sasa, K; Seddik, H; Shibata, Y; Shinbori, K; Suzuki, K; Suzuki, T; Takahashi, A; Takahashi, K; Takahashi, S; Takata, M; Tanaka, Y; Uemura, R; Watanabe, G; Watanabe, O; Yamasaki, T; Yokoyama, K; Yoshimori, M; Yoshimoto, T

SCIENCE ADVANCES 3 巻 ( 2 ) 頁： e1600446 2017年2月

A firn densification process in the high accumulation dome of southeastern Greenland 査読有り Open Access

Iizuka, Y; Miyamoto, A; Hori, A; Matoba, S; Furukawa, R; Saito, T; Fujita, S; Hirabayashi, M; Yamaguchi, S; Fujita, K; Takeuchi, N

ARCTIC ANTARCTIC AND ALPINE RESEARCH 49 巻 ( 1 ) 頁： 13 - 27 2017年2月

Precipitation regime and stable isotopes at Dome Fuji, East Antarctica 査読有り

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

Atmospheric Chemistry and Physics 16 巻 ( 11 ) 頁： 6883-6900 2016年6月

Glacier area shrinkage in eastern Nepal Himalaya since 1992 using high-resolution inventories from aerial photographs and ALOS satellite images 査読有り

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

Journal of Glaciology 62 巻 ( 233 ) 頁： 512-524 2016年4月

Abrupt and moderate climate changes in the mid-latitudes of Asia during the Holocene 査読有り

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 62 巻 ( 233 ) 頁： 411-439 2016年4月

Inconsistent relations among major ions and water stable isotopes in Antarctic snow under different accumulation environments 査読有り

Hoshina Y, Fujita K, Iizuka Y, Motoyama H

Polar Science 10 巻 ( 1 ) 頁： 1-10 2016年3月

Heterogeneity in supraglacial debris thickness and its role in glacier mass changes of the Mount Gongga 査読有り

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

Science China Earth Sciences 59 巻 ( 1 ) 頁： 170-184 2016年1月

Geomorphic and geologic controls of geohazards induced by Nepal's 2015 Gorkha earthquake 査読有り

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 351 巻 ( 6269 ) 頁： aac8353 2016年1月

Comparison of multiple glacier inventories with a new inventory derived from high-resolution ALOS imagery in the Bhutan Himalaya 査読有り

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

The Cryosphere 10 巻 ( 1 ) 頁： 65-85 2016年1月

First in situ record of decadal glacier mass balance (2003-2014) from the Bhutan Himalaya 査読有り

Tshering P, Fujita K

Annals of Glaciology, 57 巻 ( 71 ) 頁： 289-294 2016年1月

Historically unprecedented global glacier decline in the early 21st century 査読有り

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, 61 巻 ( 228 ) 頁： 745-761 2015年8月

Climate regime of Asian glaciers revealed by GAMDAM Glacier Inventory 査読有り

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

The Cryosphere 9 巻頁： 865-880 2015年5月

The GAMDAM glacier inventory: a quality controlled inventory of Asian glaciers 査読有り

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, 9 巻頁： 849-864 2015年5月

The disappearance of glaciers in the Tien Shan Mountains in Central Asia at the end of Pleistocene 査読有り

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

Quaternary Science Reviews 103 巻頁： 26-33 2014年9月

Snow particle speeds in drifting snow 査読有り

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

Journal of Geophysical Research - Atmospheres 119 巻 ( 16 ) 頁： 9901-9913 2014年8月

Modelling runoff from a Himalayan debris-covered glacier 査読有り

Fujita K, Sakai A

Hydrology and Earth System Sciences 18 巻 ( 7 ) 頁： 2679-2694 2014年7月

Effect of accumulation rate on water stable isotopes of near-surface snow in inland Antarctica 査読有り

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

Journal of Geophysical Research - Atmospheres 119 巻 ( 1 ) 頁： 274-283 2014年2月

ヒマラヤ氷河スキャンダルとその後招待有り査読有り

藤田耕史

雪氷 76 巻 ( 1 ) 頁： 69-78 2014年1月

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査読有り

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 76 巻 ( 1 ) 頁： 105-114 2014年1月

May-September precipitation in the Bhutan Himalaya since 1743 as reconstructed from tree ring cellulose d18O 査読有り

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

Journal of Geophysical Research - Atmospheres 118 巻 ( 5 ) 頁： 8399-8410 2013年8月

Southwest-facing slopes control the formation of debris-covered glaciers in the Bhutan Himalaya 査読有り

Nagai H, Fujita K, Nuimura T, Sakai A

The Cryosphere 7 巻 ( 4 ) 頁： 1303-1314 2013年8月

Potential flood volume of Himalayan glacial lakes 査読有り

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

Natural Hazards and Earth System Sciences 13 巻 ( 7 ) 頁： 1827-1839 2013年7月

Changes in ice thickness and flow velocity of Yala Glacier, Langtang Himal, Nepal, from 1982 to 2009 査読有り

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

Annals of Glaciology 54 巻 ( 64 ) 頁： 157-162 2013年7月

Energy and mass balance of the Zhadang Glacier surface, central Tibetan Plateau 査読有り

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 59 巻 ( 213 ) 頁： 137-148 2013年2月

Modeling glacier behavior under different precipitation seasonalities 査読有り

Yamaguchi S, Fujita K

Arctic, Antarctic, and Alpine Research 45 巻 ( 1 ) 頁： 143-152 2013年2月

DNA analysis for section identification of individual Pinus pollen grains from Belukha glacier, Altai Mountains, Russia 査読有り

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

Environmental Research Letters 8 巻 ( 1 ) 頁： 014032 2013年2月

River runoff over 2000 years in the arid Heihe River Basin, northwestern China 招待有り査読有り

Fujita K, Sakai A

PAGES news 20 巻 ( 2 ) 頁： 76-77 2012年12月

Outline of research project on glacial lake outburst floods in the Bhutan Himalayas 招待有り査読有り

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

Global Environmental Research 16 巻 ( 1 ) 頁： 3-12 2012年7月

Variation in suspended sediment concentration of supraglacial lakes on debris-covered area of Lirung Glacier in Nepali Himalayas 招待有り査読有り

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

Global Environmental Research 16 巻 ( 1 ) 頁： 95-104 2012年7月

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

Nuimura T, Fujita K, Yamaguchi S, Sharma RR

Journal of Glaciology 58 巻 ( 210 ) 頁： 648-656 2012年5月

The state and fate of Himalayan glaciers 査読有り

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 336 巻 ( 6079 ) 頁： 310-314 2012年4月

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 査読有り

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

Water History 4 巻 ( 2 ) 頁： 177-196 2012年4月

The rates of sea salt sulfatization in the atmosphere and surface snow of inland Antarctica 査読有り

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 117 巻頁： D04308 2012年2月

Distribution of debris thickness and its effect on ice melt at Hailuogou glacier, southeastern Tibetan Plateau, using in situ surveys and ASTER imagery 査読有り

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

Journal of Glaciology 57 巻 ( 206 ) 頁： 1147-1157 2011年12月

Spatial and temporal variability of snow accumulation rate on the East Antarctic ice divide between Dome Fuji and EPICA DML 査読有り

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 5 巻 ( 4 ) 頁： 1057-1081 2011年11月

Glacial lake inventory of Bhutan using ALOS data: Part I: methods and preliminary results 査読有り

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 52 巻 ( 58 ) 頁： 65-71 2011年8月

Spatially heterogeneous wastage of Himalayan glaciers 査読有り

Fujita K, Nuimura T

Proceedings of the National Academy of Sciences of the United States of America 108 巻 ( 34 ) 頁： 14011-14014 2011年8月

Favorable climatic regime for maintaining the present-day geometry of the Gregoriev Glacier, Inner Tien Shan 査読有り

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

The Cryosphere 5 巻 ( 3 ) 頁： 539-549 2011年7月

Temporal changes in elevation of the debris-covered ablation area of Khumbu Glacier in the Nepal Himalaya since 1978 査読有り

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

Arctic, Antarctic, and Alpine Research 43 巻 ( 2 ) 頁： 246-255 2011年5月

Establishing the timing of chemical deposition events on Belukha glacier, Altai Mountains, Russia, using pollen analysis 査読有り

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

Arctic, Antarctic, and Alpine Research 43 巻 ( 1 ) 頁： 66-72 2011年3月

Climate Change: Another Antarctic rhythm 招待有り

Fujita K

Nature 471 巻 ( 7336 ) 頁： 45-46 2011年3月

Evidence for propagation of cold-adapted yeast in an ice core from a Siberian Altai glacier 査読有り

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

Journal of Geophysical Research - Biogeosciences 116 巻頁： G01019 2011年2月

Reevaluation of the reconstruction of summer temperatures from melt features in Belukha ice cores, Siberian Altai 査読有り

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 116 巻頁： D02110 2011年1月

Self-regulated fluctuations in the ablation of a snow patch over four decades 査読有り

Fujita K, Hiyama K, Iida H, Ageta Y

Water Resources Research 46 巻頁： W11541 2010年11月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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. 査読有り

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

Hydrological Processes, 24(19), . 24 巻 ( 19 ) 頁： 2798-2806 2010年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

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招待有り

藤田耕史

遺伝 64 巻 ( 5 ) 頁： 68-74 2010年9月

Characteristics of high-precipitation events in Dronning Maud Land, Antarctica. 査読有り

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

Journal of Geophysical Research - Atmospheres 115 巻頁： D14107 2010年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

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

Atmospheric Chemistry and Physics 10 巻頁： 6603-6615 2010年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Formation conditions of supraglacial lakes on debris-covered glaciers in the Himalayas. 査読有り

Sakai A, Fujita K

Journal of Glaciology 56 巻 ( 195 ) 頁： 177-181 2010年4月

Multi-decadal ice-velocity and elevation changes of a monsoonal maritime glacier: Hailuogou glacier, China. 査読有り

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

Journal of Glaciology 56 巻 ( 195 ) 頁： 65-74 2010年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

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

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

Environmental Research Letters 4 巻頁： 045207 2009年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

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

Bulletin of Glaciological Research 27 巻頁： 25-35 2009年12月

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

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

Environmental Research Letters 4 巻頁： 045205 2009年11月

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. 査読有り

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

Journal of Geophysical Research - Atmospheres 114 巻頁： D18115 2009年9月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

Sakai A, Fujita K, Nakawo M, Yao T

Hydrological Processes 23 巻 ( 4 ) 頁： 585-596 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Effect of precipitation seasonality on climatic sensitivity of glacier mass balance. 査読有り

Fujita K

Earth and Planetary Science Letters 276 巻 ( 1-2 ) 頁： 14-19 2008年11月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

ヒマラヤにおける氷河変動招待有り

藤田耕史

豊田自動織機技報 56 巻頁： 78-84 2008年9月

Rapid decrease of mass balance observed in the Xiao (Lesser) Dongkemadi Glacier, in the central Tibetan Plateau. 査読有り

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

Hydrological Processes 22 巻 ( 16 ) 頁： 2953-2958 2008年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Influence of precipitation seasonality on glacier mass balance and its sensitivity to climate change. 査読有り

Fujita K

Annals of Glaciology 48 巻頁： 88-92 2008年6月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

ドームふじにおける放射観測. 査読有り

平沢尚彦, 藤田耕史

南極資料 52 巻 ( 特集号 ) 頁： 170-181 2008年6月

記述言語：日本語

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.

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. 査読有り

平沢尚彦, 藤田耕史

南極資料 52 巻 ( 特集号 ) 頁： 159-169 2008年6月

記述言語：日本語

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.

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. 査読有り

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 21 巻 ( 2 ) 頁： 158-176 2008年3月

記述言語：日本語

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/

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

Fujita K, Suzuki R, Nuimura T, Sakai A

Journal of Glaciology 54 巻 ( 185 ) 頁： 220-228 2008年3月

七一氷河を巡る

藤田耕史

アジア遊学 99 巻頁： 24-27 2007年

Surfacewater-groundwater interaction in the Heihe River basin, Northwestern China. 査読有り

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

Bulletin of Glaciological Research 24 巻頁： 87-94 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

* Spatial distribution of thermal properties on debris-covered glaciers in the Himalayas derived from ASTER data. 査読有り

Suzuki R, Fujita K, Ageta Y

Bulletin of Glaciological Research 24 巻頁： 13-22 2007年

Characteristics and climatic sensitivities of runoff from a cold-type glacier on the Tibetan Plateau. 査読有り

Fujita K, Ohta T, Ageta Y

Hydrological Processes 21 巻 ( 21 ) 頁： 2882-2891 2007年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

Effect of dust event timing on glacier runoff: sensitivity analysis for a Tibetan glacier. 査読有り

Fujita K

Hydrological Processes 21 巻 ( 21 ) 頁： 2892-2896 2007年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

Topographical survey of end-moraine and dead ice area at the Imja Glacial Lake in 2001 and 2002. 査読有り

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

Bulletin of Glaciological Research 24 巻頁： 29-36 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）

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).

Meteorological observations during 2002-2004 in Lunana region, Bhutan Himalayas. 査読有り

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

Bulletin of Glaciological Research 24 巻頁： 71-78 2007年

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Worldwide shrinkage of glaciers. 招待有り

Fujita K

Japanese Alpine News 8 巻頁： 90-96 2007年

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 298 (Glaciology 32) 巻頁： 92pp 2007年

Topographical survey of July 1st Glacier in Qilian Mountains, China. 査読有り

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

Bulletin of Glaciological Research 23 巻頁： 63-67 2006年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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.

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

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

Annals of Glaciology 43 巻頁： 148-153 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

氷河変動と海水準に関する最近の研究. 査読有り

藤田耕史

雪氷 68 巻 ( 6 ) 頁： 625-637 2006年

Stable isotopes in daily precipitation at Dome Fuji, East Antarctica. 査読有り

Fujita K, Abe O

Geophysical Research Letters 33 巻 ( 18 ) 頁： L18503 2006年

Aeolian dust experiment on climate impact: An overview of Japan-China joint project ADEC. 査読有り

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 52 巻 ( 1-4 ) 頁： 142-172 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Five decades of shrinkage of the July 1st Glacier, Qilian Mountains, China. 査読有り

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

Journal of Glaciology 52 巻 ( 176 ) 頁： 11-16 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

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

Annals of Glaciology 43 巻頁： 49-60 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

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

Annals of Glaciology 43 巻頁： 142-147 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Use of ice cores from glaciers with melting for reconstructing mean summer temperature variations. 査読有り

Nakazawa F, Fujita K

Annals of Glaciology 43 巻頁： 167-171 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Estimation of atmospheric transmissivity of solar radiation from precipitation in the Himalayas and Tibetan Plateau. 査読有り

Matsuda Y, Fujita K, Ageta Y, Sakai A

Annals of Glaciology 34 巻頁： 344-350 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

A snow algal community on Akkem Glacier in the Russian Altai Mountains. 査読有り

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

Annals of Glaciology 43 巻頁： 378-384 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

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

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

Bulletin of Glaciological Research 23 巻頁： 85-93 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Hydrological observations at July 1st Glacier in northwest China from 2002 to 2004. 査読有り

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

Bulletin of Glaciological Research 23 巻頁： 33-39 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

Meteorological observation at July 1st Glacier in northwest China from 2002 to 2005. 査読有り

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

Bulletin of Glaciological Research 23 巻頁： 23-31 2006年

記述言語：英語掲載種別：研究論文（学術雑誌）

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.

* Thirty-year history of glacier melting in the Nepal Himalayas. 査読有り

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

Journal of Geophysical Research - Atmospheres 111 巻 ( D3 ) 頁： D03109 2006年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

Determination of amino acids in ice samples. 査読有り

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

Bulletin of Glaciological Research 22 巻頁： 69-74 2005年

Mass balance of the Qiyi Glacier in the Qilian Mountains: a new observation. 査読有り

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

Journal of Glaciology and Geocryology 27 巻 ( 2 ) 頁： 199-204 2005年

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

Takeuchi N, Matsuda Y, Sakai A, Fujita K

Bulletin of Glaciological Research 22 巻頁： 1-8 2005年

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. 査読有り

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 18 巻 ( 5 ) 頁： 531-538 2005年

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-. 査読有り

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 49 巻 ( 2 ) 頁： 207-243 2005年

記述言語：日本語

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.

Stable isotope time series and precipitation origin from firn cores and snow samples, Altai glacier, Siberia. 査読有り

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

Journal of Glaciology 51 巻 ( 175 ) 頁： 637-654 2005年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Dating of seasonal snow/firn accumulation layers using pollen analysis. 査読有り

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

Journal of Glaciology 51 巻 ( 174 ) 頁： 483-490 2005年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Application of pollen analysis to dating of ice cores from lower-latitude glaciers. 査読有り

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

Journal of Geophysical Research - Earth Surface 109 巻 ( F4 ) 頁： F04001 2004年

記述言語：英語掲載種別：研究論文（学術雑誌）

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

Evaporation and percolation effect on melting at debris-covered Lirung Glacier, Nepal Himalayas, 1996. 査読有り

Sakai A, Fujita K, Kubota J

Bulletin of Glaciological Research 21 巻頁： 9-15 2004年

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. 査読有り

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 17 巻 ( 1 ) 頁： 61-68 2004年

Glaciological observations on the plateau of Belukha Glacier in the Altai Mountains, Russia from 2001 to 2003. 査読有り

Fujita K, Takeuchi N, Aizen V, Nikitin S

Bulletin of Glaciological Research 21 巻頁： 57-64 2004年

Chemical characteristics in a 22-m ice core at Belukha Glacier, Russia. 査読有り

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

Polar Meteorology and Glaciology 18 巻頁： 114-120 2004年

Glaciological observations on July 1st glacier in Qilian Mountains of west China during summer 2002. 査読有り

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

Bulletin of Glaciological Research 21 巻頁： 31-36 2004年

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. 査読有り

藤田耕史, 太田岳史, 上田豊

水文・水資源学会誌 16 巻 ( 2 ) 頁： 152-161 2003年

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

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

Bulletin of Glaciological Research 20 巻頁： 7-14 2003年

Volume change of Imja Glacial Lake in the Nepal Himalayas. 査読有り

Sakai A, Fujita K, Yamada T

Disaster Mitigation and Water Management 頁： 556-561 2003年

Impact of dust on glacier mass balance of the Tibetan Plateau. 査読有り

Fujita K

Journal of Arid Land Studies 11 巻 ( 4 ) 頁： 355-360 2002年

Ice core drilling on the southern slope of Nepal Himalayas. 査読有り

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

Memoirs of National Institute of Polar Research Special Issue 56 巻頁： 59-66 2002年

The impact of aeolian dust on climate: Sino-Japanese cooperative project ADEC. 査読有り

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 11 巻 ( 4 ) 頁： 211-222 2002年

Surface lowering over the ablation area of Lirung Glacier, Nepal Himalayas. 査読有り

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

Bulletin of Glaciological Research 19 巻頁： 41-46 2002年

Distribution characteristics and energy balance of ice cliffs on debri-covered glaciers, Nepal Himalaya. 査読有り

Sakai A, Nakawo M, Fujita K

Arctic, Antarctic and Alpine Research 34 巻 ( 1 ) 頁： 12-19 2002年

Shrinkage of Glacier AX010 in Shorong region, Nepal Himalayas in the 1990s. 査読有り

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

Bulletin of Glaciological Research 18 巻頁： 51-54 2001年

Glaciological observations on Rikha Samba Glacier in Hidden Valley, Nepal Himalayas, 1998 and 1999. 査読有り

Fujita K, Nakazawa F, Rana B

Bulletin of Glaciological Research 18 巻頁： 31-35 2001年

Variation of precipitation d18O in Langtang Valley, Himalayas. 査読有り

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

Science in China D44 巻 ( 9 ) 頁： 769-778 2001年

Study project on the recent rapid shrinkage of summer-accumulation type glaciers in the Himalayas, 1997-1999. 査読有り

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

Bulletin of Glaciological Research 18 巻頁： 45-49 2001年

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. 査読有り

藤田耕史

雪氷 63 巻 ( 2 ) 頁： 171-179 2001年

Seasonal changes in dissolved chemical composition and flux of meltwater draining from Lirung Glacier in the Nepal Himalayas. 査読有り

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

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

Mass balance of Xiao Dongkemadi Glacier on the central Tibetan Plateau from 1989 to 1995. 査読有り

Fujita K, Ageta Y, Pu J, Yao T

Annals of Glaciology 31 巻頁： 159-163 2000年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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. 査読有り

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

Journal of Glaciology 46 巻 ( 153 ) 頁： 335-340 2000年

記述言語：英語掲載種別：研究論文（学術雑誌）

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. 査読有り

Fujita K, Ageta Y

Journal of Glaciology 46 巻 ( 153 ) 頁： 244-252 2000年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

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. 査読有り

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 81 巻 ( 24 ) 頁： 265, 270-271 2000年

Air temperature environment on the debris-covered area of Lirung Glacier, Langtang Valley, Nepal Himalayas. 査読有り

Fujita K, Sakai A

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

Role of supraglacial ponds in the ablation process of a debris-covered glacier in the Nepal Himalayas. 査読有り

Sakai A, Takeuchi N, Fujita K, Nakawo M

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

Characteristics of cryoconite holes on a Himalayan glacier, Yala Glacier Central Nepal. 査読有り

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

Bulletin of Glaciological Research 17 巻頁： 51-59 2000年

Melt rate of ice cliffs on the Lirung Glacier, Nepal Himalayas, 1996. 査読有り

Sakai A, Nakawo M, Fujita

Bulletin of Glacier Research 16 巻頁： 57-66 1998年

Snow algae community on a Himalayan glacier, Glacier AX010 East Nepal : Relationship with glacier summer mass balance. 査読有り

Takeuchi N, Kohshima S, Fujita K

Bulletin of Glacier Research 16 巻頁： 43-50 1998年

チベット高原の寒冷氷河における上積氷の研究. 査読有り

藤田耕史

雪氷 60 巻 ( 5 ) 頁： 379-385 1998年

Surface flow of the ablation area of the Lirung Glacier in Langtang Valley, Nepal Himalayas. 査読有り

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

Bulletin of Glacier Research 16 巻頁： 67-73 1998年

Glaciological observations of Yala Glacier in Langtang Valley, Nepal Himalayas, 1994 and 1996. 査読有り

Fujita K, Takeuchi N, Seko K

Bulletin of Glacier Research 16 巻頁： 75-81 1998年

Water discharge from the Lirung Glacier in Langtang Valley, Nepal Himalayas. 1996. 査読有り

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

Bulletin of Glacier Research 15 巻頁： 79-83 1997年7月

Meteorological observation in Langtang Valley, 1996. 査読有り

Fujita K, Sakai A, Chhetri TB

Bulletin of Glacier Research 15 巻頁： 71-78 1997年7月

Basic studies for assessing the impacts of the global warming on the Himalayan cryosphere, 1994-1996. 査読有り

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

Bulletin of Glacier Research 15 巻頁： 53-58 1997年7月

Monitoring and prediction of shrinkage of a small glacier in the Nepal Himalaya. 査読有り

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

Annals of Glaciology 24 巻頁： 90-94 1997年

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

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

Cryosphere 3 巻頁： 68-72 1997年

Changes in glaciers in Hidden Valley, Mukut Himal, Nepal Himalayas, from 1974 to 1994. 査読有り

Fujita K, Nakawo M, Fujii Y, Paudyal P

Journal of Glaciology 43 巻 ( 145 ) 頁： 583-588 1997年

Glaciological research in Hidden Valley, Mukut Himal in 1994. 査読有り

Fujii Y, Fujita K, Paudyal P

Bulletin of Glacier Research 14 巻頁： 7-11 1996年5月

ネパール・クンブー地方「1995年パンガ雪崩」報告. 査読有り

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 58 巻 ( 2 ) 頁： 145-155 1996年3月

Energy budget at ELA on Dongkemadi Glacier in the Tanggula Mts. Tibetan Plateau. 査読有り

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

Journal of Glaciology and Geocryology 18 巻 ( 1 ) 頁： 10-19 1996年

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

Zhang Y, Yao T, Xie Z, Fujita K

Zeitschrift für Gletscherkunde und Glazialgeologie 32 巻頁： 67-74 1996年

A comparison of mass balance between the Meikuang Glacier and the Xiao Dongkemadi Glacier, Tibetan Plateau. 査読有り

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

Cryosphere 2 巻頁： 81-86 1996年

Characteristics of mass balance of summer-accumulation type glaciers in the Himalayas and Tibetan Plateau. 査読有り

Ageta Y, Fujita K

Zeitschrift für Gletscherkunde und Glazialgeologie 32 巻頁： 61-65 1996年

Superimposed ice in glacier mass balance on the Tibetan Plateau. 査読有り

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

Journal of Glaciology 42 巻 ( 142 ) 頁： 454-460 1996年

Mass balance on the Dongkemadi and Meikuang Glaciers in 1992/1993. 査読有り

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

Journal of Glaciology and Geocryology 17 巻 ( 2 ) 頁： 138-141 1995年

Glaciological observation in the Tanggula Mts., Tibetan Plateau. 査読有り

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

Bulletin of Glacier Research 12 巻頁： 57-67 1994年8月

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