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| Titel |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
| VerfasserIn |
R. S. W. van de Wal, C. J. P. P. Smeets, W. Boot, M. Stoffelen, R. van Kampen, S. H. Doyle, F. Wilhelms, M. R. van den Broeke, C. H. Reijmer, J. Oerlemans  , A. Hubbard |
| 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 ; 9, no. 2 ; Nr. 9, no. 2 (2015-04-01), S.603-611 |
| Datensatznummer |
250116772
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| Publikation (Nr.) |
 copernicus.org/tc-9-603-2015.pdf |
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| Zusammenfassung |
| The concept of a positive feedback between ice flow and enhanced melt rates
in a warmer climate fuelled the debate regarding the temporal and spatial
controls on seasonal ice acceleration. Here we combine melt, basal water
pressure and ice velocity data. Using 20 years of data covering
the whole ablation area, we show that there is not a strong positive correlation
between annual ice velocities and melt rates. Annual velocities even
slightly decreased with increasing melt. Results also indicate that melt
variations are most important for velocity variations in the upper ablation
zone up to the equilibrium line altitude. During the extreme melt in 2012, a
large velocity response near the equilibrium line was observed, highlighting
the possibility of meltwater to have an impact even high on the ice sheet.
This may lead to an increase of the annual ice velocity in the region above
S9 and requires further monitoring. |
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