Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ...
In the Amundsen sector of West Antarctica, the flow of glaciers accelerates when intrusion of warm ocean water onto the continental shelf induces strong melting beneath ice shelves and thinning near the glacier’s grounding lines. Projecting the future of these glaciers is, however, hindered by a poo...
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ftdatacite:10.17863/cam.35847 2024-02-04T09:53:10+01:00 Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... Bougamont, MH Christoffersen, Poul Nias, Isabel Vaughan, DG Smith, AM Brisbourne, Alex 2019 https://dx.doi.org/10.17863/cam.35847 https://www.repository.cam.ac.uk/handle/1810/288564 en eng Wiley-Blackwell https://dx.doi.org/10.5285/3cf26ab6-7f47-4868-a87d-c62a2eefea1f open.access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 Article ScholarlyArticle JournalArticle article-journal 2019 ftdatacite https://doi.org/10.17863/cam.3584710.5285/3cf26ab6-7f47-4868-a87d-c62a2eefea1f 2024-01-05T09:20:26Z In the Amundsen sector of West Antarctica, the flow of glaciers accelerates when intrusion of warm ocean water onto the continental shelf induces strong melting beneath ice shelves and thinning near the glacier’s grounding lines. Projecting the future of these glaciers is, however, hindered by a poor understanding of the dynamical processes that may exacerbate, or on the contrary modulate, the inland ice sheet response. This study seeks to investigate processes occurring at the base of Pine Island Glacier through numerical inversions of surface velocities observed in 1996 and 2014, a period of time during which the glacier accelerated significantly. The outputs show that substantial changes took place in the basal environment, which we interpreted with models of undrained subglacial till and hydrological routing. The annual basal melt production increased by 25% on average. Basal drag weakened by 15% over nearly two thirds of the region of accelerated flow, largely due to the direct assimilation of ... Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Shelves Pine Island Pine Island Glacier West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctica |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
In the Amundsen sector of West Antarctica, the flow of glaciers accelerates when intrusion of warm ocean water onto the continental shelf induces strong melting beneath ice shelves and thinning near the glacier’s grounding lines. Projecting the future of these glaciers is, however, hindered by a poor understanding of the dynamical processes that may exacerbate, or on the contrary modulate, the inland ice sheet response. This study seeks to investigate processes occurring at the base of Pine Island Glacier through numerical inversions of surface velocities observed in 1996 and 2014, a period of time during which the glacier accelerated significantly. The outputs show that substantial changes took place in the basal environment, which we interpreted with models of undrained subglacial till and hydrological routing. The annual basal melt production increased by 25% on average. Basal drag weakened by 15% over nearly two thirds of the region of accelerated flow, largely due to the direct assimilation of ... |
format |
Article in Journal/Newspaper |
author |
Bougamont, MH Christoffersen, Poul Nias, Isabel Vaughan, DG Smith, AM Brisbourne, Alex |
spellingShingle |
Bougamont, MH Christoffersen, Poul Nias, Isabel Vaughan, DG Smith, AM Brisbourne, Alex Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
author_facet |
Bougamont, MH Christoffersen, Poul Nias, Isabel Vaughan, DG Smith, AM Brisbourne, Alex |
author_sort |
Bougamont, MH |
title |
Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
title_short |
Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
title_full |
Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
title_fullStr |
Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
title_full_unstemmed |
Contrasting hydrological controls on bed properties during the acceleration of Pine Island Glacier, West Antarctica ... |
title_sort |
contrasting hydrological controls on bed properties during the acceleration of pine island glacier, west antarctica ... |
publisher |
Wiley-Blackwell |
publishDate |
2019 |
url |
https://dx.doi.org/10.17863/cam.35847 https://www.repository.cam.ac.uk/handle/1810/288564 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier West Antarctica |
geographic_facet |
Pine Island Glacier West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Ice Shelves Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelves Pine Island Pine Island Glacier West Antarctica |
op_relation |
https://dx.doi.org/10.5285/3cf26ab6-7f47-4868-a87d-c62a2eefea1f |
op_rights |
open.access Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.17863/cam.3584710.5285/3cf26ab6-7f47-4868-a87d-c62a2eefea1f |
_version_ |
1789964461872775168 |