Antarctic Ice Sheet melting in the southeast Pacific
The first oceanographic measurements across a deep channel beneath the calving front of Pine Island Glacier reveal a sub‐ice circulation driven by basal melting of 10–12 m yr−1. A salt box model described here gives a melt rate similar to that of ice balance and numerical models, 5–50 times higher t...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
1996
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/42222/ https://doi.org/10.1029/96GL00723 https://nrl.northumbria.ac.uk/id/eprint/42222/1/Antarctic%20Ice%20Sheet%20melting%20in%20the%20southeast%20Pacific.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:42222 2023-05-15T13:44:52+02:00 Antarctic Ice Sheet melting in the southeast Pacific Jacobs, Stanley S. Hellmer, Hartmut H. Jenkins, Adrian 1996-05-01 text https://nrl.northumbria.ac.uk/id/eprint/42222/ https://doi.org/10.1029/96GL00723 https://nrl.northumbria.ac.uk/id/eprint/42222/1/Antarctic%20Ice%20Sheet%20melting%20in%20the%20southeast%20Pacific.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/42222/1/Antarctic%20Ice%20Sheet%20melting%20in%20the%20southeast%20Pacific.pdf Jacobs, Stanley S., Hellmer, Hartmut H. and Jenkins, Adrian (1996) Antarctic Ice Sheet melting in the southeast Pacific. Geophysical Research Letters, 23 (9). pp. 957-960. ISSN 0094-8276 F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 1996 ftunivnorthumb https://doi.org/10.1029/96GL00723 2022-09-25T06:11:31Z The first oceanographic measurements across a deep channel beneath the calving front of Pine Island Glacier reveal a sub‐ice circulation driven by basal melting of 10–12 m yr−1. A salt box model described here gives a melt rate similar to that of ice balance and numerical models, 5–50 times higher than averages for the George VI and Ross Ice Shelves. Melting is fueled by relatively warm Circumpolar Deep Water that floods the deep floor of the Amundsen and Bellingshausen Sea continental shelves, reaching the deep draft of this floating glacier. A revised melt rate for ice shelves in the Southeast Pacific sector raises circumpolar ice shelf melting to 756 Gt yr−1. Given prior estimates of surface accumulation and iceberg calving, this suggests that the Antarctic Ice Sheet is currently losing mass to the ocean. Article in Journal/Newspaper Antarc* Antarctic Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Iceberg* Pine Island Glacier Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic Bellingshausen Sea Pacific Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic Geophysical Research Letters 23 9 957 960 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Jacobs, Stanley S. Hellmer, Hartmut H. Jenkins, Adrian Antarctic Ice Sheet melting in the southeast Pacific |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
The first oceanographic measurements across a deep channel beneath the calving front of Pine Island Glacier reveal a sub‐ice circulation driven by basal melting of 10–12 m yr−1. A salt box model described here gives a melt rate similar to that of ice balance and numerical models, 5–50 times higher than averages for the George VI and Ross Ice Shelves. Melting is fueled by relatively warm Circumpolar Deep Water that floods the deep floor of the Amundsen and Bellingshausen Sea continental shelves, reaching the deep draft of this floating glacier. A revised melt rate for ice shelves in the Southeast Pacific sector raises circumpolar ice shelf melting to 756 Gt yr−1. Given prior estimates of surface accumulation and iceberg calving, this suggests that the Antarctic Ice Sheet is currently losing mass to the ocean. |
format |
Article in Journal/Newspaper |
author |
Jacobs, Stanley S. Hellmer, Hartmut H. Jenkins, Adrian |
author_facet |
Jacobs, Stanley S. Hellmer, Hartmut H. Jenkins, Adrian |
author_sort |
Jacobs, Stanley S. |
title |
Antarctic Ice Sheet melting in the southeast Pacific |
title_short |
Antarctic Ice Sheet melting in the southeast Pacific |
title_full |
Antarctic Ice Sheet melting in the southeast Pacific |
title_fullStr |
Antarctic Ice Sheet melting in the southeast Pacific |
title_full_unstemmed |
Antarctic Ice Sheet melting in the southeast Pacific |
title_sort |
antarctic ice sheet melting in the southeast pacific |
publisher |
American Geophysical Union |
publishDate |
1996 |
url |
https://nrl.northumbria.ac.uk/id/eprint/42222/ https://doi.org/10.1029/96GL00723 https://nrl.northumbria.ac.uk/id/eprint/42222/1/Antarctic%20Ice%20Sheet%20melting%20in%20the%20southeast%20Pacific.pdf |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic Bellingshausen Sea Pacific Pine Island Glacier The Antarctic |
geographic_facet |
Antarctic Bellingshausen Sea Pacific Pine Island Glacier The Antarctic |
genre |
Antarc* Antarctic Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Iceberg* Pine Island Glacier |
genre_facet |
Antarc* Antarctic Bellingshausen Sea Ice Sheet Ice Shelf Ice Shelves Iceberg* Pine Island Glacier |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/42222/1/Antarctic%20Ice%20Sheet%20melting%20in%20the%20southeast%20Pacific.pdf Jacobs, Stanley S., Hellmer, Hartmut H. and Jenkins, Adrian (1996) Antarctic Ice Sheet melting in the southeast Pacific. Geophysical Research Letters, 23 (9). pp. 957-960. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1029/96GL00723 |
container_title |
Geophysical Research Letters |
container_volume |
23 |
container_issue |
9 |
container_start_page |
957 |
op_container_end_page |
960 |
_version_ |
1766207762803458048 |