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| Titel |
The stability of grounding lines on retrograde slopes |
| VerfasserIn |
G. H. Gudmundsson, J. Krug, G. Durand, L. Favier, O. Gagliardini |
| 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 ; 6, no. 6 ; Nr. 6, no. 6 (2012-12-12), S.1497-1505 |
| Datensatznummer |
250003880
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| Publikation (Nr.) |
 copernicus.org/tc-6-1497-2012.pdf |
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| Zusammenfassung |
| The stability of marine ice sheets grounded on beds that slope upwards
in the overall direction of flow is investigated numerically in two
horizontal dimensions. We give examples of stable grounding lines on
such retrograde slopes illustrating that marine ice sheets are not
unconditionally unstable in two horizontal dimensions. Retrograde bed
slopes at the grounding lines of marine ice sheets, such as the West
Antarctic Ice Sheet (WAIS), do not per se imply an instability, nor do
they imply that these regions are close to a threshold of instability.
We therefore question those estimates of the potential near-future
contribution of WAIS to global sea level change based solely on the
notion that WAIS, resting on a retrograde slope, must be inherently
unstable. |
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