کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6410204 | 1629921 | 2015 | 8 صفحه PDF | دانلود رایگان |
- The overall glacier elevation change was calculated based on DEMs.
- The debris-covered ice thinned much more rapidly than the exposed ice.
- Surface lowering rates varied significantly with glaciers and altitudes.
- Glacier imbalance constitutes 40% of the Rongbuk runoff.
- A continuous rising trend of air temperature explains glacier melting.
Elevation changes of glacier surfaces were investigated in Rongbuk Catchment (RC) on the northern slopes of Mt. Qomolangma in the central Himalayas, by comparing a digital elevation model (DEM) generated from the 2006 ALOS/PRISM imageries with the base DEM1974 derived from the 1:50,000 topographic maps. The average elevation change rate of glacier surfaces in RC was estimated at â0.47 ± 0.23 m aâ1 between 1974 and 2006. Such surface lowering rates varied significantly with glaciers and altitudes. One of the notable results is that the debris-covered ice thinned much more rapidly than the exposed ice at higher altitudes. Overall, glaciers in RC have lost mass of â0.06 ± 0.04 Gt aâ1 during 1974-2006. Glacier imbalance constitutes about 50% or more of the Rongbuk runoff.
Journal: Journal of Hydrology - Volume 530, November 2015, Pages 273-280