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| Titel |
Restoring mass conservation to shallow ice flow models over complex terrain |
| VerfasserIn |
A. H. Jarosch, C. G. Schoof, F. S. Anslow |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 7, no. 1 ; Nr. 7, no. 1 (2013-02-07), S.229-240 |
| Datensatznummer |
250017415
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| Publikation (Nr.) |
 copernicus.org/tc-7-229-2013.pdf |
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| Zusammenfassung |
| Numerical simulation of glacier dynamics in mountainous regions using
zero-order, shallow ice models is desirable for computational efficiency so as
to allow broad coverage. However, these models present several difficulties
when applied to complex terrain. One such problem arises where steep
terrain can spuriously lead to large ice fluxes that remove more mass from a
grid cell than it originally contains, leading to mass conservation being
violated. This paper describes a vertically integrated, shallow ice model using
a second-order flux-limiting spatial discretization scheme that enforces mass
conservation. An exact solution to ice flow over a bedrock step is derived for
a given mass balance forcing as a benchmark to evaluate the model performance
in such a difficult setting. This benchmark should serve as a useful test for
modellers interested in simulating glaciers over complex terrain. |
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