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| Titel |
A glacier inventory for the western Nyainqentanglha Range and the Nam Co Basin, Tibet, and glacier changes 1976–2009 |
| VerfasserIn |
T. Bolch, T. Yao, S. Kang, M. F. Buchroithner  , D. Scherer, F. Maussion, E. Huintjes, C. Schneider |
| 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 ; 4, no. 3 ; Nr. 4, no. 3 (2010-09-29), S.419-433 |
| Datensatznummer |
250001773
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| Publikation (Nr.) |
 copernicus.org/tc-4-419-2010.pdf |
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| Zusammenfassung |
| The western Nyainqentanglha Range is located in the south-eastern centre of
the Tibetan Plateau. Its north-western slopes drain into Lake Nam Co. The
region is of special interest for glacio-climatological research as it is
influenced by both the continental climate of Central Asia and the Indian
Monsoon system, and situated at the transition zone between temperate and
subcontinental glaciers. A glacier inventory for the whole mountain range
was generated for the year around 2001 using automated remote sensing and
GIS techniques based on Landsat ETM+ and SRTM3 DEM data. Glacier change
analysis was based on data from Hexagon KH-9 and Landsat MSS (both 1976),
Metric Camera (1984), and Landsat TM/ETM+ (1991, 2001, 2005, 2009). Manual
adjustment was especially necessary for delineating the debris-covered
glaciers and the glaciers on the panchromatic Hexagon data. In the years
around 2001 the whole mountain range contained about 960 glaciers covering
an area of 795.6 ± 22.3 km2 while the ice in the drainage basin of
Nam Co covered 198.1 ± 5.6 km2. The median elevation of the
glaciers was about 5800 m with the majority terminating around 5600 m. Five
glaciers with debris-covered tongues terminated lower than 5200 m. The
glacier area decreased by −6.1 ± 3% between 1976 and 2001. This is
less than reported in previous studies based on the 1970s topographic maps
and Landsat data from 2000. Glaciers continued to shrink during the period
2001–2009. No advancing glaciers were detected. Detailed length
measurements for five glaciers indicated a retreat of around 10 m per year
(1976–2009). Ice cover is higher south-east of the mountain ridge which
reflects the windward direction to the monsoon. The temperature increase
during the ablation period was probably the main driver of glacier wastage,
but the complex glacier-climate interactions need further investigation. |
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