Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics
International audience Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argu...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00561257 https://hal.science/hal-00561257/document https://hal.science/hal-00561257/file/2010GL043334.pdf https://doi.org/10.1029/2010GL043334 |
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openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Cryosphere: Ice shelves Cryosphere: Dynamics [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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Cryosphere: Ice shelves Cryosphere: Dynamics [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Gagliardini, O. Durand, Geoffroy Zwinger, T. Hindmarsh, R. C. A. Le Meur, E. Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
topic_facet |
Cryosphere: Ice shelves Cryosphere: Dynamics [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argue that the influence of ice-shelf melting on the ice-sheet dynamics induces a complex response, and the first naive view that melting inevitably leads to loss of grounded ice is erroneous. We demonstrate that melting acts directly on the magnitude of the buttressing force by modifying both the area experiencing lateral resistance and the ice-shelf velocity, indicating that the decrease of back stress imposed by the ice-shelf is the prevailing cause of inland dynamical thinning. We further show that feedback from melting and buttressing forces can lead to nontrivial results, as an increase in the average melt rate may lead to inland ice thickening and grounding line advance. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) Scientific Computing Ltd (CSC) CLIPS, EDGE 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 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)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) ANR-06-VULN-0016,DACOTA,Dynamique des glaciers côtiers et rôle sur le bilan de masse global de l'Antarctique zone atelier du glacier de l'Astrolabe, Terre Adélie(2006) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) |
format |
Article in Journal/Newspaper |
author |
Gagliardini, O. Durand, Geoffroy Zwinger, T. Hindmarsh, R. C. A. Le Meur, E. |
author_facet |
Gagliardini, O. Durand, Geoffroy Zwinger, T. Hindmarsh, R. C. A. Le Meur, E. |
author_sort |
Gagliardini, O. |
title |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_short |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_full |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_fullStr |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_full_unstemmed |
Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
title_sort |
coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00561257 https://hal.science/hal-00561257/document https://hal.science/hal-00561257/file/2010GL043334.pdf https://doi.org/10.1029/2010GL043334 |
genre |
Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Ice Sheet Ice Shelf Ice Shelves |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00561257 Geophysical Research Letters, 2010, 37, pp.14501. ⟨10.1029/2010GL043334⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GL043334 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00561257 https://hal.science/hal-00561257 https://hal.science/hal-00561257/document https://hal.science/hal-00561257/file/2010GL043334.pdf BIBCODE: 2010GeoRL.3714501G doi:10.1029/2010GL043334 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010GL043334 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
14 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1797584858744094720 |
spelling |
ftinsu:oai:HAL:hal-00561257v1 2024-04-28T08:24:48+00:00 Coupling of ice-shelf melting and buttressing is a key process in ice-sheets dynamics Gagliardini, O. Durand, Geoffroy Zwinger, T. Hindmarsh, R. C. A. Le Meur, E. Laboratoire de glaciologie et géophysique de l'environnement (LGGE) 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 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)-Centre National de la Recherche Scientifique (CNRS) Scientific Computing Ltd (CSC) CLIPS, EDGE 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 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)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) ANR-06-VULN-0016,DACOTA,Dynamique des glaciers côtiers et rôle sur le bilan de masse global de l'Antarctique zone atelier du glacier de l'Astrolabe, Terre Adélie(2006) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) 2010-07 https://hal.science/hal-00561257 https://hal.science/hal-00561257/document https://hal.science/hal-00561257/file/2010GL043334.pdf https://doi.org/10.1029/2010GL043334 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GL043334 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00561257 https://hal.science/hal-00561257 https://hal.science/hal-00561257/document https://hal.science/hal-00561257/file/2010GL043334.pdf BIBCODE: 2010GeoRL.3714501G doi:10.1029/2010GL043334 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-00561257 Geophysical Research Letters, 2010, 37, pp.14501. ⟨10.1029/2010GL043334⟩ Cryosphere: Ice shelves Cryosphere: Dynamics [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2010 ftinsu https://doi.org/10.1029/2010GL043334 2024-04-05T00:38:11Z International audience Increase in ice-shelf melting is generally presumed to have triggered recent coastal ice-sheet thinning. Using a full-Stokes finite element model which includes a proper description of the grounding line dynamics, we investigate the impact of melting below ice shelves. We argue that the influence of ice-shelf melting on the ice-sheet dynamics induces a complex response, and the first naive view that melting inevitably leads to loss of grounded ice is erroneous. We demonstrate that melting acts directly on the magnitude of the buttressing force by modifying both the area experiencing lateral resistance and the ice-shelf velocity, indicating that the decrease of back stress imposed by the ice-shelf is the prevailing cause of inland dynamical thinning. We further show that feedback from melting and buttressing forces can lead to nontrivial results, as an increase in the average melt rate may lead to inland ice thickening and grounding line advance. Article in Journal/Newspaper Ice Sheet Ice Shelf Ice Shelves Institut national des sciences de l'Univers: HAL-INSU Geophysical Research Letters 37 14 n/a n/a |