Retreat of Pine Island Glacier controlled by marine ice-sheet instability
Over the past 40 years Pine Island Glacier in West Antarctica has thinned at an accelerating rate, so that at present it is the largest single contributor to sea-level rise in Antarctica. In recent years, the grounding line, which separates the grounded ice sheet from the floating ice shelf, has ret...
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ftnerc:oai:nora.nerc.ac.uk:504568 2023-05-15T13:48:08+02:00 Retreat of Pine Island Glacier controlled by marine ice-sheet instability Favier, L. Durand, G. Cornford, S. L. Gudmundsson, G. H. Gagliardini, O. Gillet-Chaulet, F. Zwinger, T. Payne, A. J. Le Brocq, A. M. 2014-02 http://nora.nerc.ac.uk/id/eprint/504568/ unknown Favier, L.; Durand, G.; Cornford, S. L.; Gudmundsson, G. H. orcid:0000-0003-4236-5369 Gagliardini, O.; Gillet-Chaulet, F.; Zwinger, T.; Payne, A. J.; Le Brocq, A. M. 2014 Retreat of Pine Island Glacier controlled by marine ice-sheet instability. Nature Climate Change, 4 (2). 117-121. https://doi.org/10.1038/nclimate2094 <https://doi.org/10.1038/nclimate2094> Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1038/nclimate2094 2023-02-04T19:38:31Z Over the past 40 years Pine Island Glacier in West Antarctica has thinned at an accelerating rate, so that at present it is the largest single contributor to sea-level rise in Antarctica. In recent years, the grounding line, which separates the grounded ice sheet from the floating ice shelf, has retreated by tens of kilometres. At present, the grounding line is crossing a retrograde bedrock slope that lies well below sea level, raising the possibility that the glacier is susceptible to the marine ice-sheet instability mechanism. Here, using three state-of-the-art ice-flow models, we show that Pine Island Glacier's grounding line is probably engaged in an unstable 40km retreat. The associated mass loss increases substantially over the course of our simulations from the average value of 20 Gt yr−1 observed for the 1992–2011 period, up to and above 100 Gt yr−1, equivalent to 3.5–10 mm eustatic sea-level rise over the following 20 years. Mass loss remains elevated from then on, ranging from 60 to 120 Gt yr−1. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica Natural Environment Research Council: NERC Open Research Archive West Antarctica Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Nature Climate Change 4 2 117 121 |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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unknown |
description |
Over the past 40 years Pine Island Glacier in West Antarctica has thinned at an accelerating rate, so that at present it is the largest single contributor to sea-level rise in Antarctica. In recent years, the grounding line, which separates the grounded ice sheet from the floating ice shelf, has retreated by tens of kilometres. At present, the grounding line is crossing a retrograde bedrock slope that lies well below sea level, raising the possibility that the glacier is susceptible to the marine ice-sheet instability mechanism. Here, using three state-of-the-art ice-flow models, we show that Pine Island Glacier's grounding line is probably engaged in an unstable 40km retreat. The associated mass loss increases substantially over the course of our simulations from the average value of 20 Gt yr−1 observed for the 1992–2011 period, up to and above 100 Gt yr−1, equivalent to 3.5–10 mm eustatic sea-level rise over the following 20 years. Mass loss remains elevated from then on, ranging from 60 to 120 Gt yr−1. |
format |
Article in Journal/Newspaper |
author |
Favier, L. Durand, G. Cornford, S. L. Gudmundsson, G. H. Gagliardini, O. Gillet-Chaulet, F. Zwinger, T. Payne, A. J. Le Brocq, A. M. |
spellingShingle |
Favier, L. Durand, G. Cornford, S. L. Gudmundsson, G. H. Gagliardini, O. Gillet-Chaulet, F. Zwinger, T. Payne, A. J. Le Brocq, A. M. Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
author_facet |
Favier, L. Durand, G. Cornford, S. L. Gudmundsson, G. H. Gagliardini, O. Gillet-Chaulet, F. Zwinger, T. Payne, A. J. Le Brocq, A. M. |
author_sort |
Favier, L. |
title |
Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
title_short |
Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
title_full |
Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
title_fullStr |
Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
title_full_unstemmed |
Retreat of Pine Island Glacier controlled by marine ice-sheet instability |
title_sort |
retreat of pine island glacier controlled by marine ice-sheet instability |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/504568/ |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
West Antarctica Pine Island Glacier |
geographic_facet |
West Antarctica Pine Island Glacier |
genre |
Antarc* Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica |
op_relation |
Favier, L.; Durand, G.; Cornford, S. L.; Gudmundsson, G. H. orcid:0000-0003-4236-5369 Gagliardini, O.; Gillet-Chaulet, F.; Zwinger, T.; Payne, A. J.; Le Brocq, A. M. 2014 Retreat of Pine Island Glacier controlled by marine ice-sheet instability. Nature Climate Change, 4 (2). 117-121. https://doi.org/10.1038/nclimate2094 <https://doi.org/10.1038/nclimate2094> |
op_doi |
https://doi.org/10.1038/nclimate2094 |
container_title |
Nature Climate Change |
container_volume |
4 |
container_issue |
2 |
container_start_page |
117 |
op_container_end_page |
121 |
_version_ |
1766248735969378304 |