Surface mass balance of the Potanin Glacier in the Mongolian Altai Mountains and comparison with Russian Altai glaciers in 2005, 2008, and 2009（モンゴル・アルタイ山脈ポタニン氷河の2005, 2008, 2009年の表面質量収支とロシア・アルタイの氷河との比較）

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概要

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• Glaciological surveys and glacier balance studies in the Mongolian Altai Mountains are necessary for understanding the impact of climate change within the area.　Such studies are important globally because the data can help expand the range of monitoring of the worldwide glacier observation network.　We estimated the glacier-wide surface mass balance (ΔM) of the Potanin Glacier in the Mongolian Altai Mountains by means of stake observations, pollen analyses, and pit observations.　We estimated ΔM as －0.97, －1.23, and －0.17 m w.e. (water equivalents) for the years 2005, 2008, and 2009, respectively.　The high negative value of mass balance observed in 2008 was due to lower amounts of solid precipitation and higher summer temperatures in comparison with 2005 and 2009.　A comparison of the Potanin Glacier with the Maliy Aktru Glacier in the Russian Altai Mountains, both locate in the slightly drier and warmer climate region, revealed that the two glaciers experienced similar mass balance fluctuations between 2005 and 2009, which was probably because these two glaciers are from the same regional climate system.　However, the ΔM of the Potanin Glacier in 2008 (－1.23) was more negative than that of the Maliy Aktru Glacier (－0.87).　Thus, we concluded that the lower value of ΔM at the Potanin Glacier compared with that of the Maliy Aktru Glacier was due to the smaller accumulation area ratio (AAR) as the higher equilibrium line altitude of the glacier.

• 公益社団法人 日本雪氷学会の論文

著者

• DAVAA Gombo

  Institute of Meteorology and Hydrology

• YABUKI Hironori（矢吹裕伯）

  Japan Agency for Marine-Earth Science and Technology

• KONYA Keiko（紺屋恵子）

  Japan Agency for Marine-Earth Science and Technology

• KADOTA Tsutomu（門田勤）

  Japan Agency for Marine-Earth Science and Technology

• NAKAZAWA Fumio（中澤文男）

  National Institute of Polar Science

• PUREVDAGVA Kalsan

  Institute of Meteorology and Hydrology

• OHATA Tetsuo（大畑哲夫）

  Japan Agency for Marine-Earth Science and Technology

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• Determining soil erosion history and processes using fallout radionuclides in semiarid grassland, Mongolia(2)(Abstracts of Papers Presented at the Meeting of the Union in June 2006 at Mongolia)
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• Surface mass balance of the Potanin Glacier in the Mongolian Altai Mountains and comparison with Russian Altai glaciers in 2005, 2008, and 2009（モンゴル・アルタイ山脈ポタニン氷河の2005, 2008, 2009年の表面質量収支とロシア・アルタイの氷河との比較）

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