Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet
We present detailed records of lake discharge, ice motion and passive seismicity capturing the behaviour and processes preceding, during and following the rapid drainage of a 4 km2 supraglacial lake through 1.1-km-thick ice on the western margin of the Greenland Ice Sheet. Peak discharge of 3300 m3...
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Language: | English |
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Copernicus Publications
2013
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Online Access: | https://doi.org/10.5194/tc-7-129-2013 http://www.the-cryosphere.net/7/129/2013/tc-7-129-2013.pdf https://doaj.org/article/d44ba57ad43641baa48bcf4bc038ec40 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:d44ba57ad43641baa48bcf4bc038ec40 2023-05-15T16:27:39+02:00 Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet S. H. Doyle A. L. Hubbard C. F. Dow G. A. Jones A. Fitzpatrick A. Gusmeroli B. Kulessa K. Lindback R. Pettersson J. E. Box 2013-01-01 https://doi.org/10.5194/tc-7-129-2013 http://www.the-cryosphere.net/7/129/2013/tc-7-129-2013.pdf https://doaj.org/article/d44ba57ad43641baa48bcf4bc038ec40 en eng Copernicus Publications doi:10.5194/tc-7-129-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/129/2013/tc-7-129-2013.pdf https://doaj.org/article/d44ba57ad43641baa48bcf4bc038ec40 undefined The Cryosphere, Vol 7, Iss 1, Pp 129-140 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/tc-7-129-2013 2023-01-22T19:30:35Z We present detailed records of lake discharge, ice motion and passive seismicity capturing the behaviour and processes preceding, during and following the rapid drainage of a 4 km2 supraglacial lake through 1.1-km-thick ice on the western margin of the Greenland Ice Sheet. Peak discharge of 3300 m3 s−1 coincident with maximal rates of vertical uplift indicates that surface water accessed the ice–bed interface causing widespread hydraulic separation and enhanced basal motion. The differential motion of four global positioning system (GPS) receivers located around the lake record the opening and closure of the fractures through which the lake drained. We hypothesise that the majority of discharge occurred through a 3-km-long fracture with a peak width averaged across its wetted length of 0.4 m. We argue that the fracture's kilometre-scale length allowed rapid discharge to be achieved by combining reasonable water velocities with sub-metre fracture widths. These observations add to the currently limited knowledge of in situ supraglacial lake drainage events, which rapidly deliver large volumes of water to the ice–bed interface. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Unknown Greenland The Cryosphere 7 1 129 140 |
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language |
English |
topic |
geo envir |
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geo envir S. H. Doyle A. L. Hubbard C. F. Dow G. A. Jones A. Fitzpatrick A. Gusmeroli B. Kulessa K. Lindback R. Pettersson J. E. Box Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
topic_facet |
geo envir |
description |
We present detailed records of lake discharge, ice motion and passive seismicity capturing the behaviour and processes preceding, during and following the rapid drainage of a 4 km2 supraglacial lake through 1.1-km-thick ice on the western margin of the Greenland Ice Sheet. Peak discharge of 3300 m3 s−1 coincident with maximal rates of vertical uplift indicates that surface water accessed the ice–bed interface causing widespread hydraulic separation and enhanced basal motion. The differential motion of four global positioning system (GPS) receivers located around the lake record the opening and closure of the fractures through which the lake drained. We hypothesise that the majority of discharge occurred through a 3-km-long fracture with a peak width averaged across its wetted length of 0.4 m. We argue that the fracture's kilometre-scale length allowed rapid discharge to be achieved by combining reasonable water velocities with sub-metre fracture widths. These observations add to the currently limited knowledge of in situ supraglacial lake drainage events, which rapidly deliver large volumes of water to the ice–bed interface. |
format |
Article in Journal/Newspaper |
author |
S. H. Doyle A. L. Hubbard C. F. Dow G. A. Jones A. Fitzpatrick A. Gusmeroli B. Kulessa K. Lindback R. Pettersson J. E. Box |
author_facet |
S. H. Doyle A. L. Hubbard C. F. Dow G. A. Jones A. Fitzpatrick A. Gusmeroli B. Kulessa K. Lindback R. Pettersson J. E. Box |
author_sort |
S. H. Doyle |
title |
Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
title_short |
Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
title_full |
Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
title_fullStr |
Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
title_full_unstemmed |
Ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the Greenland Ice Sheet |
title_sort |
ice tectonic deformation during the rapid in situ drainage of a supraglacial lake on the greenland ice sheet |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-129-2013 http://www.the-cryosphere.net/7/129/2013/tc-7-129-2013.pdf https://doaj.org/article/d44ba57ad43641baa48bcf4bc038ec40 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 1, Pp 129-140 (2013) |
op_relation |
doi:10.5194/tc-7-129-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/129/2013/tc-7-129-2013.pdf https://doaj.org/article/d44ba57ad43641baa48bcf4bc038ec40 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-7-129-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
1 |
container_start_page |
129 |
op_container_end_page |
140 |
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1766017102253129728 |