| Seasonal speedup along the western flank of the Greenland Ice Sheet. | |
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MedLine Citation:
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PMID: 18420901 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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It has been widely hypothesized that a warmer climate in Greenland would increase the volume of lubricating surface meltwater reaching the ice-bedrock interface, accelerating ice flow and increasing mass loss. We have assembled a data set that provides a synoptic-scale view, spanning ice-sheet to outlet-glacier flow, with which to evaluate this hypothesis. On the ice sheet, these data reveal summer speedups (50 to 100%) consistent with, but somewhat larger than, earlier observations. The relative speedup of outlet glaciers, however, is far smaller (<15%). Furthermore, the dominant seasonal influence on Jakobshavn Isbrae's flow is the calving front's annual advance and retreat. With other effects producing outlet-glacier speedups an order of magnitude larger, seasonal melt's influence on ice flow is likely confined to those regions dominated by ice-sheet flow. |
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Authors:
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Ian Joughin; Sarah B Das; Matt A King; Ben E Smith; Ian M Howat; Twila Moon |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2008-04-17 |
Journal Detail:
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Title: Science (New York, N.Y.) Volume: 320 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 2008 May |
Date Detail:
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Created Date: 2008-05-09 Completed Date: 2008-05-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
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Languages: eng Pagination: 781-3 Citation Subset: - |
Affiliation:
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Polar Science Center, Applied Physics Lab, University of Washington, 1013 NE 40th Street, Seattle, WA 98105-6698, USA. ian@apl.washington.edu |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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