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...
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Language: | English |
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Copernicus Publications
2012
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ftdoajarticles:oai:doaj.org/article:501ac126fde443c79856f9e5b0d9b823 2023-05-15T13:43:51+02:00 The stability of grounding lines on retrograde slopes G. H. Gudmundsson J. Krug G. Durand L. Favier O. Gagliardini 2012-12-01T00:00:00Z https://doi.org/10.5194/tc-6-1497-2012 https://doaj.org/article/501ac126fde443c79856f9e5b0d9b823 EN eng Copernicus Publications http://www.the-cryosphere.net/6/1497/2012/tc-6-1497-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-1497-2012 1994-0416 1994-0424 https://doaj.org/article/501ac126fde443c79856f9e5b0d9b823 The Cryosphere, Vol 6, Iss 6, Pp 1497-1505 (2012) Environmental sciences GE1-350 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/tc-6-1497-2012 2022-12-31T14:45:38Z 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. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic West Antarctic Ice Sheet The Cryosphere 6 6 1497 1505 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 G. H. Gudmundsson J. Krug G. Durand L. Favier O. Gagliardini The stability of grounding lines on retrograde slopes |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
Article in Journal/Newspaper |
author |
G. H. Gudmundsson J. Krug G. Durand L. Favier O. Gagliardini |
author_facet |
G. H. Gudmundsson J. Krug G. Durand L. Favier O. Gagliardini |
author_sort |
G. H. Gudmundsson |
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 |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/tc-6-1497-2012 https://doaj.org/article/501ac126fde443c79856f9e5b0d9b823 |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 6, Iss 6, Pp 1497-1505 (2012) |
op_relation |
http://www.the-cryosphere.net/6/1497/2012/tc-6-1497-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-1497-2012 1994-0416 1994-0424 https://doaj.org/article/501ac126fde443c79856f9e5b0d9b823 |
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_ |
1766194160391421952 |