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01 Jun 2012
Status : this preprint has been withdrawn by the authors.
Recession, thinning, and slowdown of Greenland's Mittivakkat Gletscher
S. H. Mernild , N. T. Knudsen , J. C. Yde , M. J. Hoffman , W. H. Lipscomb , R. S. Fausto , E. Hanna , and J. K. Malmros
Glaciers in Southeast Greenland have thinned and receded during the past several decades. Here, we document changes for the Mittivakkat Gletscher, the only glacier in Greenland with long-term mass balance observations and surface velocity measurements (since 1995). Between 1986 and 2011, this glacier shrank by 18 % in surface area, 20 % in mean ice thickness, and 33 % in volume. We attribute these changes to summertime warming and to drier winter conditions. Meanwhile, the annual mean ice surface velocity decreased by 30 %, likely as a dynamic result of thinning. This dynamic thinning is predicted by ice deformation theory but has rarely been observed on decadal time scales. Mittivakkat Gletscher summer surface velocities were on average 50–60 % above winter background values, and up to 160 % higher during peak velocity events. The transition from winter to summer values followed the onset of positive temperatures. Satellite observations show area losses for most other glaciers in the region; these glaciers are likely also to have lost volume (in average around one-third) and slowed down in recent decades.
This preprint has been withdrawn.
Received: 05 Apr 2012 – Discussion started: 01 Jun 2012
Publisher's note : Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
S. H. Mernild , N. T. Knudsen , J. C. Yde , M. J. Hoffman , W. H. Lipscomb , R. S. Fausto , E. Hanna , and J. K. Malmros
Interactive discussion
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Status: closed
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Interactive discussion
Status: closed
Status: closed
AC : Author comment | RC : Referee comment | SC : Short comment | EC : Editor comment
- Printer-friendly version
- Supplement
S. H. Mernild , N. T. Knudsen , J. C. Yde , M. J. Hoffman , W. H. Lipscomb , R. S. Fausto , E. Hanna , and J. K. Malmros
S. H. Mernild , N. T. Knudsen , J. C. Yde , M. J. Hoffman , W. H. Lipscomb , R. S. Fausto , E. Hanna , and J. K. Malmros
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