Journal
JOURNAL OF HYDROLOGY
Volume 530, Issue -, Pages 273-280Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhydrol.2015.09.014
Keywords
ALOS/PRISM; Digital elevation model (DEM); Mt. Qomolangma (Mt. Everest MQ); Rongbuk Catchment (RC); Glacier mass changes; Topographic maps
Funding
- Special Basic Research Project of MST [2013FY111400-2]
- NSF of China [41120114001, 41125003, 40971048, 41071254]
- Foundation Program for outstanding Young Scholar of CAS [KZCX2-EW-QN104]
- Open Research Fund of TEL in CAS
- State Key Laboratory of Remote Sensing Science
- DFG [BO 3199/2-1, BU 949/20-1]
- ESA [4000101778/10/I-AM]
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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 -0.47 +/- 0.23 m a(-1) 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 -0.06 +/- 0.04 Gt a(-1) during 1974-2006. Glacier imbalance constitutes about 50% or more of the Rongbuk runoff. (C) 2015 Elsevier B.V. All rights reserved.
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