The ice dynamic and melting response of Pine Island Ice Shelf to calving
Abstract Sea level rise contributions from the Pine Island Glacier (PIG) are strongly modulated by the backstress that its floating extension – Pine Island Ice Shelf (PIIS) – exerts on the adjoining grounded ice. The front of PIIS has recently retreated significantly via calving, and satellite and t...
Published in: | Annals of Glaciology |
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2022
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Online Access: | http://dx.doi.org/10.1017/aog.2023.24 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000241 |
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crcambridgeupr:10.1017/aog.2023.24 2024-06-09T07:38:32+00:00 The ice dynamic and melting response of Pine Island Ice Shelf to calving Bradley, Alexander T. De Rydt, Jan Bett, David T. Dutrieux, Pierre Holland, Paul R. British Antarctic Survey National Science Foundation 2022 http://dx.doi.org/10.1017/aog.2023.24 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000241 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Annals of Glaciology volume 63, issue 87-89, page 111-115 ISSN 0260-3055 1727-5644 journal-article 2022 crcambridgeupr https://doi.org/10.1017/aog.2023.24 2024-05-15T13:01:16Z Abstract Sea level rise contributions from the Pine Island Glacier (PIG) are strongly modulated by the backstress that its floating extension – Pine Island Ice Shelf (PIIS) – exerts on the adjoining grounded ice. The front of PIIS has recently retreated significantly via calving, and satellite and theoretical analyses have suggested further retreat is inevitable. As well as inducing an instantaneous increase in ice flow, retreat of the PIIS front may result in increased ocean melting, by relaxing the topographic barrier to warm ocean water that is currently provided by a prominent seabed ridge. Recently published research (Bradley and others, 2022a) has shown that PIIS may exhibit a strong melting response to calving, with melting close to the PIG grounding line always increasing with ice front retreat. Here, we summarise this research and, additionally, place the results in a glaciological context by comparing the impact of melt-induced and ice-dynamical changes in the ice shelf thinning rate. We find that while PIG is expected to experience rapid acceleration in response to further ice front retreat, the mean instantaneous thinning response is set primarily by changes in melting, rather than ice dynamics. Overall, further ice front retreat is expected to lead to enhanced ice-shelf thinning, with potentially detrimental consequences for ice shelf stability. Article in Journal/Newspaper Annals of Glaciology Ice Shelf Pine Island Glacier Cambridge University Press Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Annals of Glaciology 1 5 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Sea level rise contributions from the Pine Island Glacier (PIG) are strongly modulated by the backstress that its floating extension – Pine Island Ice Shelf (PIIS) – exerts on the adjoining grounded ice. The front of PIIS has recently retreated significantly via calving, and satellite and theoretical analyses have suggested further retreat is inevitable. As well as inducing an instantaneous increase in ice flow, retreat of the PIIS front may result in increased ocean melting, by relaxing the topographic barrier to warm ocean water that is currently provided by a prominent seabed ridge. Recently published research (Bradley and others, 2022a) has shown that PIIS may exhibit a strong melting response to calving, with melting close to the PIG grounding line always increasing with ice front retreat. Here, we summarise this research and, additionally, place the results in a glaciological context by comparing the impact of melt-induced and ice-dynamical changes in the ice shelf thinning rate. We find that while PIG is expected to experience rapid acceleration in response to further ice front retreat, the mean instantaneous thinning response is set primarily by changes in melting, rather than ice dynamics. Overall, further ice front retreat is expected to lead to enhanced ice-shelf thinning, with potentially detrimental consequences for ice shelf stability. |
author2 |
British Antarctic Survey National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Bradley, Alexander T. De Rydt, Jan Bett, David T. Dutrieux, Pierre Holland, Paul R. |
spellingShingle |
Bradley, Alexander T. De Rydt, Jan Bett, David T. Dutrieux, Pierre Holland, Paul R. The ice dynamic and melting response of Pine Island Ice Shelf to calving |
author_facet |
Bradley, Alexander T. De Rydt, Jan Bett, David T. Dutrieux, Pierre Holland, Paul R. |
author_sort |
Bradley, Alexander T. |
title |
The ice dynamic and melting response of Pine Island Ice Shelf to calving |
title_short |
The ice dynamic and melting response of Pine Island Ice Shelf to calving |
title_full |
The ice dynamic and melting response of Pine Island Ice Shelf to calving |
title_fullStr |
The ice dynamic and melting response of Pine Island Ice Shelf to calving |
title_full_unstemmed |
The ice dynamic and melting response of Pine Island Ice Shelf to calving |
title_sort |
ice dynamic and melting response of pine island ice shelf to calving |
publisher |
Cambridge University Press (CUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1017/aog.2023.24 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0260305523000241 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier |
geographic_facet |
Pine Island Glacier |
genre |
Annals of Glaciology Ice Shelf Pine Island Glacier |
genre_facet |
Annals of Glaciology Ice Shelf Pine Island Glacier |
op_source |
Annals of Glaciology volume 63, issue 87-89, page 111-115 ISSN 0260-3055 1727-5644 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/aog.2023.24 |
container_title |
Annals of Glaciology |
container_start_page |
1 |
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5 |
_version_ |
1801373530879688704 |