Estimation of ice thickness using surface velocities and slope: case study at Gangotri Glacier, India
Estimation of ice thickness using surface velocities and slope: case study at Gangotri Glacier, India
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DOI：
10.3189/2014jog13j078
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发表时间：
2014-01-01
影响因子：
3.4
通讯作者：
Srinivasan, J.
中科院分区：
文献类型：
--
作者：
Gantayat, Prateek;Kulkarni, Anil V.;Srinivasan, J.
我们利用表面速度、坡度和冰流定律来估计喜马拉雅冰川的冰厚度分布。甘戈特里冰川的表面速度是使用 Landsat TM 和 ETM+ 图像的亚像素相关性估算的。速度范围从积累区域的 14-85 m a(-1) 到口鼻附近的 20-30 ma(-1) 不等。使用层流方程计算深度剖面。厚度从上游的 540 m 到吻部附近的 50-60 m 不等。冰川的体积估计为 23.2 +/- 4.2 km(3)。
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).