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| Titel |
A stabilized finite element method for calculating balance velocities in ice sheets |
| VerfasserIn |
D. Brinkerhoff, J. Johnson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 8, no. 5 ; Nr. 8, no. 5 (2015-05-04), S.1275-1283 |
| Datensatznummer |
250116333
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| Publikation (Nr.) |
 copernicus.org/gmd-8-1275-2015.pdf |
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| Zusammenfassung |
| We present a numerical method for calculating vertically averaged velocity
fields using a mass conservation approach, commonly known as balance
velocities. This allows for an unstructured grid, is not dependent on
a heuristic flow routing algorithm, and is both parallelizable and efficient.
We apply the method to calculate depth-averaged velocities of the Greenland
Ice Sheet, and find that the method produces grid-independent velocity fields
for a sufficient parameterization of horizontal plane stresses on flow
directions. We show that balance velocity can be used as the forward model
for a constrained optimization problem that can be used to fill gaps and
smooth strong gradients in InSAR velocity fields. |
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