Characteristics of ocean waters reaching Greenland's glaciers
Interaction of Greenland's marine-terminating glaciers with the ocean has emerged as a key term in the ice-sheet mass balance and a plausible trigger for their recent acceleration. Our knowledge of the dynamics, however, is limited by scarcity of ocean measurements at the glacier/ocean boundary...
Published in: | Annals of Glaciology |
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Online Access: | https://doi.org/10.3189/2012AoG60A059 https://ora.ox.ac.uk/objects/uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 |
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ftuloxford:oai:ora.ox.ac.uk:uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 2024-10-06T13:46:40+00:00 Characteristics of ocean waters reaching Greenland's glaciers Straneo, F Sutherland, D Holland, D Gladish, C Hamilton, G Johnson, H Rignot, E Xu, Y Koppes, M 2016-07-28 https://doi.org/10.3189/2012AoG60A059 https://ora.ox.ac.uk/objects/uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 unknown doi:10.3189/2012AoG60A059 https://ora.ox.ac.uk/objects/uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 https://doi.org/10.3189/2012AoG60A059 info:eu-repo/semantics/embargoedAccess Journal article 2016 ftuloxford https://doi.org/10.3189/2012AoG60A059 2024-09-06T07:47:26Z Interaction of Greenland's marine-terminating glaciers with the ocean has emerged as a key term in the ice-sheet mass balance and a plausible trigger for their recent acceleration. Our knowledge of the dynamics, however, is limited by scarcity of ocean measurements at the glacier/ocean boundary. Here data collected near six marine-terminating glaciers (79 North, Kangerdlugssuaq, Helheim and Petermann glaciers, Jakobshavn Isbræ, and the combined Sermeq Kujatdleq and Akangnardleq) are compared to investigate the water masses and the circulation at the ice/ocean boundary. PolarWater, of Arctic origin, and Atlantic Water, from the subtropical North Atlantic, are found near all the glaciers. Property analysis indicates melting by AtlanticWater (AW; found at the grounding line depth near all the glaciers) and the influence of subglacial discharge at depth in summer. AWtemperatures near the glaciers range from 4.5°C in the southeast, to 0.16°C in northwest Greenland, consistent with the distance from the subtropical North Atlantic and cooling across the continental shelf. A review of its offshore variability suggests that AW temperature changes in the fjords will be largest in southern and smallest in northwest Greenland, consistent with the regional distribution of the recent glacier acceleration. © 2012 Publishing Technology. Article in Journal/Newspaper Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ North Atlantic ORA - Oxford University Research Archive Arctic Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Annals of Glaciology 53 60 202 210 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
unknown |
description |
Interaction of Greenland's marine-terminating glaciers with the ocean has emerged as a key term in the ice-sheet mass balance and a plausible trigger for their recent acceleration. Our knowledge of the dynamics, however, is limited by scarcity of ocean measurements at the glacier/ocean boundary. Here data collected near six marine-terminating glaciers (79 North, Kangerdlugssuaq, Helheim and Petermann glaciers, Jakobshavn Isbræ, and the combined Sermeq Kujatdleq and Akangnardleq) are compared to investigate the water masses and the circulation at the ice/ocean boundary. PolarWater, of Arctic origin, and Atlantic Water, from the subtropical North Atlantic, are found near all the glaciers. Property analysis indicates melting by AtlanticWater (AW; found at the grounding line depth near all the glaciers) and the influence of subglacial discharge at depth in summer. AWtemperatures near the glaciers range from 4.5°C in the southeast, to 0.16°C in northwest Greenland, consistent with the distance from the subtropical North Atlantic and cooling across the continental shelf. A review of its offshore variability suggests that AW temperature changes in the fjords will be largest in southern and smallest in northwest Greenland, consistent with the regional distribution of the recent glacier acceleration. © 2012 Publishing Technology. |
format |
Article in Journal/Newspaper |
author |
Straneo, F Sutherland, D Holland, D Gladish, C Hamilton, G Johnson, H Rignot, E Xu, Y Koppes, M |
spellingShingle |
Straneo, F Sutherland, D Holland, D Gladish, C Hamilton, G Johnson, H Rignot, E Xu, Y Koppes, M Characteristics of ocean waters reaching Greenland's glaciers |
author_facet |
Straneo, F Sutherland, D Holland, D Gladish, C Hamilton, G Johnson, H Rignot, E Xu, Y Koppes, M |
author_sort |
Straneo, F |
title |
Characteristics of ocean waters reaching Greenland's glaciers |
title_short |
Characteristics of ocean waters reaching Greenland's glaciers |
title_full |
Characteristics of ocean waters reaching Greenland's glaciers |
title_fullStr |
Characteristics of ocean waters reaching Greenland's glaciers |
title_full_unstemmed |
Characteristics of ocean waters reaching Greenland's glaciers |
title_sort |
characteristics of ocean waters reaching greenland's glaciers |
publishDate |
2016 |
url |
https://doi.org/10.3189/2012AoG60A059 https://ora.ox.ac.uk/objects/uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Arctic Greenland Jakobshavn Isbræ |
geographic_facet |
Arctic Greenland Jakobshavn Isbræ |
genre |
Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ North Atlantic |
genre_facet |
Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ North Atlantic |
op_relation |
doi:10.3189/2012AoG60A059 https://ora.ox.ac.uk/objects/uuid:0319b1dc-a338-44f5-9d3d-bc7e35209981 https://doi.org/10.3189/2012AoG60A059 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.3189/2012AoG60A059 |
container_title |
Annals of Glaciology |
container_volume |
53 |
container_issue |
60 |
container_start_page |
202 |
op_container_end_page |
210 |
_version_ |
1812174986483335168 |