2011年
Favorable climatic regime for maintaining the present-day geometry of the Gregoriev Glacier, Inner Tien Shan
CRYOSPHERE
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- 巻
- 5
- 号
- 3
- 開始ページ
- 539
- 終了ページ
- 549
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.5194/tc-5-539-2011
- 出版者・発行元
- COPERNICUS GESELLSCHAFT MBH
We conducted 2 yr (2005-2007) of in situ meteorological and glaciological observations on the Gregoriev Glacier, a flat-top glacier within the Inner Tien Shan, Kyrgyzstan. Relative carrier-phase GPS surveys reveal a vertical lowering at the summit of the glacier. Based on snow density data and an energy-mass balance model, we estimate that the annual precipitation and summer mean temperature required to maintain the glacier in the current state are 289 mm and -3.8 degrees C at the glacier summit (4600 m a.s.l.), respectively. The good agreement between dynamically derived precipitation and the long-term observed precipitation at a nearby station in the Tien Shan (296 mm at 3614 m a.s.l. for the period 1930-2002) suggests that the glacier has been in a near steady-state in terms of mass supply. The glacier mass-balance, reconstructed based on meteorological data from the Tien Shan station for the past 80 yr, explains the observed fluctuations in glacier extent, particularly the negative mass balance in the 1990s.
- リンク情報
- ID情報
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- DOI : 10.5194/tc-5-539-2011
- ISSN : 1994-0416
- Web of Science ID : WOS:000295377900002