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| Titel |
Ice flow modelling in the area of Subglacial Lake Ellsworth. |
| VerfasserIn |
Maxime Jay-Allemand, Fabien Gillet-Chaulet, Richard C. A. Hindmarsh |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250037676
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| Zusammenfassung |
| We use Elmer to model the 3D flow of ice in area with a simplified topography resembling Lake Ellsworth (Antarctica): a suglacial lake sitting in the bottom of a deep valley. Boundary conditions are periodic on the lateral sides. The upper surface is a free-surface with zero accumulation. On the bottom surface the lake is represented by an area with no basal drag. The results show that ice is drained toward the deep valley where high velocities are obtained. We observe a flattening of the free surface above the lake. Vertical velocity profiles are affected by the large variations in bed topography and sliperiness and are very different from place to place showing the effects of longitudinal stress gradients in the area. |
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