期刊
JOURNAL OF GLACIOLOGY
卷 60, 期 220, 页码 277-282出版社
CAMBRIDGE UNIV PRESS
DOI: 10.3189/2014JoG13J078
关键词
glacial rheology; glacier flow; glacier modelling; remote sensing
We estimate the distribution of ice thickness for a Himalayan glacier using surface velocities, slope and the ice flow law. Surface velocities over Gangotri Glacier were estimated using sub-pixel correlation of Landsat TM and ETM+ imagery. Velocities range from similar to 14-85 m a(-1) in the accumulation region to similar to 20-30 ma(-1) near the snout. Depth profiles were calculated using the equation of laminar flow. Thickness varies from similar to 540 m in the upper reaches to similar to 50-60 m near the snout. The volume of the glacier is estimated to be 23.2 +/- 4.2 km(3).
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