The stability of grounding lines on retrograde slopes
International audience 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 un...
Published in: | The Cryosphere |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858/document https://hal.archives-ouvertes.fr/hal-00843858/file/tc-6-1497-2012.pdf https://doi.org/10.5194/tc-6-1497-2012 |
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ftccsdartic:oai:HAL:hal-00843858v1 2023-05-15T13:32:05+02:00 The stability of grounding lines on retrograde slopes Gudmundsson, G. H. Krug, J. Durand, Geoffroy Favier, L. Gagliardini, O. British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) NERC grant Nr. NE/H02333X/1 2012-12-12 https://hal.archives-ouvertes.fr/hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858/document https://hal.archives-ouvertes.fr/hal-00843858/file/tc-6-1497-2012.pdf https://doi.org/10.5194/tc-6-1497-2012 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-6-1497-2012 hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858/document https://hal.archives-ouvertes.fr/hal-00843858/file/tc-6-1497-2012.pdf doi:10.5194/tc-6-1497-2012 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.archives-ouvertes.fr/hal-00843858 The Cryosphere, Copernicus 2012, 6, pp.1497- 1505. ⟨10.5194/tc-6-1497-2012⟩ [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2012 ftccsdartic https://doi.org/10.5194/tc-6-1497-2012 2021-10-24T14:51:03Z International audience 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic West Antarctic Ice Sheet The Cryosphere 6 6 1497 1505 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences Gudmundsson, G. H. Krug, J. Durand, Geoffroy Favier, L. Gagliardini, O. The stability of grounding lines on retrograde slopes |
topic_facet |
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) NERC grant Nr. NE/H02333X/1 |
format |
Article in Journal/Newspaper |
author |
Gudmundsson, G. H. Krug, J. Durand, Geoffroy Favier, L. Gagliardini, O. |
author_facet |
Gudmundsson, G. H. Krug, J. Durand, Geoffroy 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 |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.archives-ouvertes.fr/hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858/document https://hal.archives-ouvertes.fr/hal-00843858/file/tc-6-1497-2012.pdf https://doi.org/10.5194/tc-6-1497-2012 |
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 |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.archives-ouvertes.fr/hal-00843858 The Cryosphere, Copernicus 2012, 6, pp.1497- 1505. ⟨10.5194/tc-6-1497-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-6-1497-2012 hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858 https://hal.archives-ouvertes.fr/hal-00843858/document https://hal.archives-ouvertes.fr/hal-00843858/file/tc-6-1497-2012.pdf doi:10.5194/tc-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 |
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1766024013294862336 |