A theory of ice-sheet surges
A simplified model of a two-dimensional ice sheet is described. It includes basal ice sliding dependent on the basal water pressure, which itself is described by a simple theory of basal drainage. We show that this simple but sophisticated model predicts surges of the ice mass in realistic circumsta...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1998
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.4761 http://www.maths.ox.ac.uk/%7Efowler/papers/1998.2.pdf |
| Summary: | A simplified model of a two-dimensional ice sheet is described. It includes basal ice sliding dependent on the basal water pressure, which itself is described by a simple theory of basal drainage. We show that this simple but sophisticated model predicts surges of the ice mass in realistic circumstances, and we descnbe these surges by solving the problem numerically. We also are able to descnbe some parts of.the surge analytically. The numerical solution of the model IS a delicate matter, and highliIghts pitfalls to be avoided if more complicated models are to be solved successfully. |
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