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| Titel |
Favorable climatic regime for maintaining the present-day geometry of the Gregoriev Glacier, Inner Tien Shan |
| VerfasserIn |
K. Fujita, N. Takeuchi, S. A. Nikitin, A. B. Surazakov, S. Okamoto, V. B. Aizen, J. Kubota |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 5, no. 3 ; Nr. 5, no. 3 (2011-07-11), S.539-549 |
| Datensatznummer |
250002587
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| Publikation (Nr.) |
 copernicus.org/tc-5-539-2011.pdf |
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| Zusammenfassung |
| 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 °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. |
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