Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers
We present ice velocities from a land-terminating transect extending >115?km into the western Greenland Ice Sheet during three contrasting melt years (2009?2011) to determine whether enhanced melting accelerates dynamic mass loss. We find no significant correlation between surface melt and annual...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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2013
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/winter-motion-mediates-dynamic-response-of-the-greenland-ice-sheet-to-warmer-summers(79821ff1-f535-48b7-92f6-d6261cbcbddd).html https://doi.org/10.1002/grl.50764 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/79821ff1-f535-48b7-92f6-d6261cbcbddd 2023-05-15T16:26:31+02:00 Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers Sole, Andrew Nienow, Peter Bartholomew, Ian Mair, Douglas Cowton, Tom Tedstone, Andrew King, Matt A. 2013-08 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/winter-motion-mediates-dynamic-response-of-the-greenland-ice-sheet-to-warmer-summers(79821ff1-f535-48b7-92f6-d6261cbcbddd).html https://doi.org/10.1002/grl.50764 eng eng info:eu-repo/semantics/restrictedAccess Sole , A , Nienow , P , Bartholomew , I , Mair , D , Cowton , T , Tedstone , A & King , M A 2013 , ' Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers ' , Geophysical Research Letters , vol. 40 , no. 15 , pp. 3940-3944 . https://doi.org/10.1002/grl.50764 Greenland ice sheet Ice sheet dynamics Ice sheet hydrology Global Positioning Systems Ice sheet melt article 2013 ftunstandrewcris https://doi.org/10.1002/grl.50764 2021-12-26T14:29:09Z We present ice velocities from a land-terminating transect extending >115?km into the western Greenland Ice Sheet during three contrasting melt years (2009?2011) to determine whether enhanced melting accelerates dynamic mass loss. We find no significant correlation between surface melt and annual ice flow. There is however a positive correlation between melt and summer ice displacement, but a negative correlation with winter displacement. This response is consistent with hydro-dynamic coupling; enhanced summer ice flow results from longer periods of increasing surface melting and greater duration ice surface to bed connections, while reduced winter motion is explicable by drainage of high basal water pressure regions by larger more extensive subglacial channels. Despite mean interannual surface melt variability of up to 70%, mean annual ice velocities changed by <7.5%. Increased summer melting thereby preconditions the ice-bed interface for reduced winter motion resulting in limited dynamic sensitivity to interannual variations in surface melting. Article in Journal/Newspaper Greenland Ice Sheet University of St Andrews: Research Portal Greenland Geophysical Research Letters 40 15 3940 3944 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Greenland ice sheet Ice sheet dynamics Ice sheet hydrology Global Positioning Systems Ice sheet melt |
spellingShingle |
Greenland ice sheet Ice sheet dynamics Ice sheet hydrology Global Positioning Systems Ice sheet melt Sole, Andrew Nienow, Peter Bartholomew, Ian Mair, Douglas Cowton, Tom Tedstone, Andrew King, Matt A. Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
topic_facet |
Greenland ice sheet Ice sheet dynamics Ice sheet hydrology Global Positioning Systems Ice sheet melt |
description |
We present ice velocities from a land-terminating transect extending >115?km into the western Greenland Ice Sheet during three contrasting melt years (2009?2011) to determine whether enhanced melting accelerates dynamic mass loss. We find no significant correlation between surface melt and annual ice flow. There is however a positive correlation between melt and summer ice displacement, but a negative correlation with winter displacement. This response is consistent with hydro-dynamic coupling; enhanced summer ice flow results from longer periods of increasing surface melting and greater duration ice surface to bed connections, while reduced winter motion is explicable by drainage of high basal water pressure regions by larger more extensive subglacial channels. Despite mean interannual surface melt variability of up to 70%, mean annual ice velocities changed by <7.5%. Increased summer melting thereby preconditions the ice-bed interface for reduced winter motion resulting in limited dynamic sensitivity to interannual variations in surface melting. |
format |
Article in Journal/Newspaper |
author |
Sole, Andrew Nienow, Peter Bartholomew, Ian Mair, Douglas Cowton, Tom Tedstone, Andrew King, Matt A. |
author_facet |
Sole, Andrew Nienow, Peter Bartholomew, Ian Mair, Douglas Cowton, Tom Tedstone, Andrew King, Matt A. |
author_sort |
Sole, Andrew |
title |
Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
title_short |
Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
title_full |
Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
title_fullStr |
Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
title_full_unstemmed |
Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers |
title_sort |
winter motion mediates dynamic response of the greenland ice sheet to warmer summers |
publishDate |
2013 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/winter-motion-mediates-dynamic-response-of-the-greenland-ice-sheet-to-warmer-summers(79821ff1-f535-48b7-92f6-d6261cbcbddd).html https://doi.org/10.1002/grl.50764 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Sole , A , Nienow , P , Bartholomew , I , Mair , D , Cowton , T , Tedstone , A & King , M A 2013 , ' Winter motion mediates dynamic response of the Greenland Ice Sheet to warmer summers ' , Geophysical Research Letters , vol. 40 , no. 15 , pp. 3940-3944 . https://doi.org/10.1002/grl.50764 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/grl.50764 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
15 |
container_start_page |
3940 |
op_container_end_page |
3944 |
_version_ |
1766015439005024256 |