The stability of grounding lines on retrograde slopes
The stability of marine ice sheets grounded on beds that slope upwards in the overall direction of flow is investigated numerically in two horizontal dimensions. We give examples of stable grounding lines on such retrograde slopes illustrating that marine ice sheets are not unconditionally unstable...
Published in: | The Cryosphere |
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Language: | English |
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Online Access: | https://doi.org/10.5194/tc-6-1497-2012 https://tc.copernicus.org/articles/6/1497/2012/ |
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ftcopernicus:oai:publications.copernicus.org:tc15997 2023-05-15T13:54:27+02:00 The stability of grounding lines on retrograde slopes Gudmundsson, G. H. Krug, J. Durand, G. Favier, L. Gagliardini, O. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/tc-6-1497-2012 https://tc.copernicus.org/articles/6/1497/2012/ eng eng info:eu-repo/grantAgreement/EC/FP7/283493 doi:10.5194/tc-6-1497-2012 https://tc.copernicus.org/articles/6/1497/2012/ info:eu-repo/semantics/openAccess eISSN: 1994-0424 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/tc-6-1497-2012 2020-07-20T16:25:38Z The stability of marine ice sheets grounded on beds that slope upwards in the overall direction of flow is investigated numerically in two horizontal dimensions. We give examples of stable grounding lines on such retrograde slopes illustrating that marine ice sheets are not unconditionally unstable in two horizontal dimensions. Retrograde bed slopes at the grounding lines of marine ice sheets, such as the West Antarctic Ice Sheet (WAIS), do not per se imply an instability, nor do they imply that these regions are close to a threshold of instability. We therefore question those estimates of the potential near-future contribution of WAIS to global sea level change based solely on the notion that WAIS, resting on a retrograde slope, must be inherently unstable. Other/Unknown Material Antarc* Antarctic Ice Sheet Copernicus Publications: E-Journals Antarctic West Antarctic Ice Sheet The Cryosphere 6 6 1497 1505 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The stability of marine ice sheets grounded on beds that slope upwards in the overall direction of flow is investigated numerically in two horizontal dimensions. We give examples of stable grounding lines on such retrograde slopes illustrating that marine ice sheets are not unconditionally unstable in two horizontal dimensions. Retrograde bed slopes at the grounding lines of marine ice sheets, such as the West Antarctic Ice Sheet (WAIS), do not per se imply an instability, nor do they imply that these regions are close to a threshold of instability. We therefore question those estimates of the potential near-future contribution of WAIS to global sea level change based solely on the notion that WAIS, resting on a retrograde slope, must be inherently unstable. |
format |
Other/Unknown Material |
author |
Gudmundsson, G. H. Krug, J. Durand, G. Favier, L. Gagliardini, O. |
spellingShingle |
Gudmundsson, G. H. Krug, J. Durand, G. Favier, L. Gagliardini, O. The stability of grounding lines on retrograde slopes |
author_facet |
Gudmundsson, G. H. Krug, J. Durand, G. Favier, L. Gagliardini, O. |
author_sort |
Gudmundsson, G. H. |
title |
The stability of grounding lines on retrograde slopes |
title_short |
The stability of grounding lines on retrograde slopes |
title_full |
The stability of grounding lines on retrograde slopes |
title_fullStr |
The stability of grounding lines on retrograde slopes |
title_full_unstemmed |
The stability of grounding lines on retrograde slopes |
title_sort |
stability of grounding lines on retrograde slopes |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-6-1497-2012 https://tc.copernicus.org/articles/6/1497/2012/ |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
eISSN: 1994-0424 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/283493 doi:10.5194/tc-6-1497-2012 https://tc.copernicus.org/articles/6/1497/2012/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-6-1497-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
6 |
container_start_page |
1497 |
op_container_end_page |
1505 |
_version_ |
1766260385435877376 |