Rapid submarine melting of the calving faces of West Greenland glaciers
Widespread glacier acceleration has been observed in Greenland in the past few years associated with the thinning of the lower reaches of the glaciers as they terminate in the ocean. These glaciers thin both at the surface, from warm air temperatures, and along their submerged faces in contact with...
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Language: | English |
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ftcdlib:qt3hw228ts 2023-05-15T16:21:07+02:00 Rapid submarine melting of the calving faces of West Greenland glaciers Rignot, E Koppes, M Velicogna, I 187 - 191 2010-03-01 application/pdf http://www.escholarship.org/uc/item/3hw228ts english eng eScholarship, University of California qt3hw228ts http://www.escholarship.org/uc/item/3hw228ts Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Rignot, E; Koppes, M; & Velicogna, I. (2010). Rapid submarine melting of the calving faces of West Greenland glaciers. Nature Geoscience, 3(3), 187 - 191. doi:10.1038/ngeo765. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/3hw228ts article 2010 ftcdlib https://doi.org/10.1038/ngeo765 2017-10-13T22:51:41Z Widespread glacier acceleration has been observed in Greenland in the past few years associated with the thinning of the lower reaches of the glaciers as they terminate in the ocean. These glaciers thin both at the surface, from warm air temperatures, and along their submerged faces in contact with warm ocean waters. Little is known about the rates of submarine melting and how they may affect glacier dynamics. Here we present measurements of ocean currents, temperature and salinity near the calving fronts of the Eqip Sermia, Kangilerngata Sermia, Sermeq Kujatdleq and Sermeq Avangnardleq glaciers in central West Greenland, as well as ice-front bathymetry and geographical positions. We calculate water-mass and heat budgets that reveal summer submarine melt rates ranging from 0.7±0.2 to 3.9±0.8 m d -1. These rates of submarine melting are two orders of magnitude larger than surface melt rates, but comparable to rates of iceberg discharge. We conclude that ocean waters melt a considerable, but highly variable, fraction of the calving fronts of glaciers before they disintegrate into icebergs, and suggest that submarine melting must have a profound influence on grounding-line stability and ice-flow dynamics. © 2010 Macmillan Publishers Limited. All rights reserved. Article in Journal/Newspaper glacier Greenland University of California: eScholarship Greenland Eqip Sermia ENVELOPE(-50.067,-50.067,69.817,69.817) Kangilerngata Sermia ENVELOPE(-50.133,-50.133,69.933,69.933) Nature Geoscience 3 3 187 191 |
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Open Polar |
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University of California: eScholarship |
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ftcdlib |
language |
English |
description |
Widespread glacier acceleration has been observed in Greenland in the past few years associated with the thinning of the lower reaches of the glaciers as they terminate in the ocean. These glaciers thin both at the surface, from warm air temperatures, and along their submerged faces in contact with warm ocean waters. Little is known about the rates of submarine melting and how they may affect glacier dynamics. Here we present measurements of ocean currents, temperature and salinity near the calving fronts of the Eqip Sermia, Kangilerngata Sermia, Sermeq Kujatdleq and Sermeq Avangnardleq glaciers in central West Greenland, as well as ice-front bathymetry and geographical positions. We calculate water-mass and heat budgets that reveal summer submarine melt rates ranging from 0.7±0.2 to 3.9±0.8 m d -1. These rates of submarine melting are two orders of magnitude larger than surface melt rates, but comparable to rates of iceberg discharge. We conclude that ocean waters melt a considerable, but highly variable, fraction of the calving fronts of glaciers before they disintegrate into icebergs, and suggest that submarine melting must have a profound influence on grounding-line stability and ice-flow dynamics. © 2010 Macmillan Publishers Limited. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Rignot, E Koppes, M Velicogna, I |
spellingShingle |
Rignot, E Koppes, M Velicogna, I Rapid submarine melting of the calving faces of West Greenland glaciers |
author_facet |
Rignot, E Koppes, M Velicogna, I |
author_sort |
Rignot, E |
title |
Rapid submarine melting of the calving faces of West Greenland glaciers |
title_short |
Rapid submarine melting of the calving faces of West Greenland glaciers |
title_full |
Rapid submarine melting of the calving faces of West Greenland glaciers |
title_fullStr |
Rapid submarine melting of the calving faces of West Greenland glaciers |
title_full_unstemmed |
Rapid submarine melting of the calving faces of West Greenland glaciers |
title_sort |
rapid submarine melting of the calving faces of west greenland glaciers |
publisher |
eScholarship, University of California |
publishDate |
2010 |
url |
http://www.escholarship.org/uc/item/3hw228ts |
op_coverage |
187 - 191 |
long_lat |
ENVELOPE(-50.067,-50.067,69.817,69.817) ENVELOPE(-50.133,-50.133,69.933,69.933) |
geographic |
Greenland Eqip Sermia Kangilerngata Sermia |
geographic_facet |
Greenland Eqip Sermia Kangilerngata Sermia |
genre |
glacier Greenland |
genre_facet |
glacier Greenland |
op_source |
Rignot, E; Koppes, M; & Velicogna, I. (2010). Rapid submarine melting of the calving faces of West Greenland glaciers. Nature Geoscience, 3(3), 187 - 191. doi:10.1038/ngeo765. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/3hw228ts |
op_relation |
qt3hw228ts http://www.escholarship.org/uc/item/3hw228ts |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ngeo765 |
container_title |
Nature Geoscience |
container_volume |
3 |
container_issue |
3 |
container_start_page |
187 |
op_container_end_page |
191 |
_version_ |
1766009131359010816 |