期刊
JOURNAL OF GLACIOLOGY
卷 54, 期 188, 页码 812-822出版社
CAMBRIDGE UNIV PRESS
DOI: 10.3189/002214308787779924
关键词
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资金
- Center for Earth Dynamic Research
- Grant Agency of Charles University in Prague [UK/252217]
- Agency of the Czech Republic [205/06/0580]
We present a new algorithm for a fast iterative improvement of the shallow-ice approximation (SIA) for the modeling of glacier flow. Based on the traditional SIA scaling assumptions, the solution of the Stokes problem is found by an operator-splitting iterative technique. The SIA solution obtained in the first step is successively improved to obtain a higher-order approximation. Each iterative step has computational demands comparable to solving the SIA, which makes the algorithm substantially faster than other higher-order or full-Stokes solvers. The performance of the algorithm is tested on a model example taken from the ISMIP-HOM intercomparison project.
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