Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model
International audience Over the last two decades, the Greenland Ice Sheet (GrIS) has been losing mass at an increasing rate, enhancing its contribution to sea-level rise. The recent increases in ice loss appear to be due to changes in both the surface mass balance of the ice sheet and 5 ice discharg...
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Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2012
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Online Access: | https://inria.hal.science/hal-00762945 https://inria.hal.science/hal-00762945/document https://inria.hal.science/hal-00762945/file/tcd-6-2789-2012.pdf https://doi.org/10.5194/tcd-6-2789-2012 |
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institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Gillet-Chaulet, Fabien Gagliardini, Olivier Seddik, Hakime Nodet, Maëlle Durand, Gaël Ritz, Catherine Zwinger, Thomas Greve, Ralph Vaughan, David G. Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
topic_facet |
[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Over the last two decades, the Greenland Ice Sheet (GrIS) has been losing mass at an increasing rate, enhancing its contribution to sea-level rise. The recent increases in ice loss appear to be due to changes in both the surface mass balance of the ice sheet and 5 ice discharge (ice flux to the ocean). Rapid ice flow directly affects the discharge, but also alters ice-sheet geometry and so affects climate and surface mass balance. The most usual ice-sheet models only represent rapid ice flow in an approximate fashion and, as a consequence, have never explicitly addressed the role of ice discharge on the total GrIS mass balance, especially at the scale of individual outlet glaciers. Here, 10 we present a new-generation prognostic ice-sheet model which reproduces the current patterns of rapid ice flow. This requires three essential developments: the complete solution of the full system of equations governing ice deformation; an unstructured mesh to usefully resolve outlet glaciers and the use of inverse methods to better constrain poorly known parameters using observations. The modelled ice discharge is in good 15 agreement with observations on the continental scale and for individual outlets. By conducting perturbation experiments, we investigate how current ice loss will endure over the next century. Although we find that increasing ablation tends to reduce outflow and on its own has a stabilising effect, if destabilisation processes maintain themselves over time, current increases in the rate of ice loss are likely to continue. |
author2 |
EDGe 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)-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) Institute of Low Temperature Science Sapporo Hokkaido University Sapporo, Japan Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Scientific Computing Ltd (CSC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) ANR-09-SYSC-0001,ADAGE,Modèles adjoints d'écoulement de la glace pour l'assimilation de données en glaciologie(2009) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) |
format |
Article in Journal/Newspaper |
author |
Gillet-Chaulet, Fabien Gagliardini, Olivier Seddik, Hakime Nodet, Maëlle Durand, Gaël Ritz, Catherine Zwinger, Thomas Greve, Ralph Vaughan, David G. |
author_facet |
Gillet-Chaulet, Fabien Gagliardini, Olivier Seddik, Hakime Nodet, Maëlle Durand, Gaël Ritz, Catherine Zwinger, Thomas Greve, Ralph Vaughan, David G. |
author_sort |
Gillet-Chaulet, Fabien |
title |
Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
title_short |
Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
title_full |
Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
title_fullStr |
Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
title_full_unstemmed |
Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model |
title_sort |
greenland ice sheet contribution to sea-level rise from a new-generation ice-sheet model |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://inria.hal.science/hal-00762945 https://inria.hal.science/hal-00762945/document https://inria.hal.science/hal-00762945/file/tcd-6-2789-2012.pdf https://doi.org/10.5194/tcd-6-2789-2012 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://inria.hal.science/hal-00762945 The Cryosphere, 2012, 6 (6), pp.1561-1576. ⟨10.5194/tcd-6-2789-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tcd-6-2789-2012 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00762945 https://inria.hal.science/hal-00762945 https://inria.hal.science/hal-00762945/document https://inria.hal.science/hal-00762945/file/tcd-6-2789-2012.pdf doi:10.5194/tcd-6-2789-2012 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tcd-6-2789-2012 |
_version_ |
1801376234014244864 |
spelling |
ftanrparis:oai:HAL:hal-00762945v1 2024-06-09T07:46:24+00:00 Greenland Ice Sheet contribution to sea-level rise from a new-generation ice-sheet model Gillet-Chaulet, Fabien Gagliardini, Olivier Seddik, Hakime Nodet, Maëlle Durand, Gaël Ritz, Catherine Zwinger, Thomas Greve, Ralph Vaughan, David G. EDGe 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)-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) Institute of Low Temperature Science Sapporo Hokkaido University Sapporo, Japan Modelling, Observations, Identification for Environmental Sciences (MOISE) Inria Grenoble - Rhône-Alpes Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK) Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) Scientific Computing Ltd (CSC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) ANR-09-SYSC-0001,ADAGE,Modèles adjoints d'écoulement de la glace pour l'assimilation de données en glaciologie(2009) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) 2012-07 https://inria.hal.science/hal-00762945 https://inria.hal.science/hal-00762945/document https://inria.hal.science/hal-00762945/file/tcd-6-2789-2012.pdf https://doi.org/10.5194/tcd-6-2789-2012 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tcd-6-2789-2012 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA hal-00762945 https://inria.hal.science/hal-00762945 https://inria.hal.science/hal-00762945/document https://inria.hal.science/hal-00762945/file/tcd-6-2789-2012.pdf doi:10.5194/tcd-6-2789-2012 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://inria.hal.science/hal-00762945 The Cryosphere, 2012, 6 (6), pp.1561-1576. ⟨10.5194/tcd-6-2789-2012⟩ [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2012 ftanrparis https://doi.org/10.5194/tcd-6-2789-2012 2024-05-16T14:21:54Z International audience Over the last two decades, the Greenland Ice Sheet (GrIS) has been losing mass at an increasing rate, enhancing its contribution to sea-level rise. The recent increases in ice loss appear to be due to changes in both the surface mass balance of the ice sheet and 5 ice discharge (ice flux to the ocean). Rapid ice flow directly affects the discharge, but also alters ice-sheet geometry and so affects climate and surface mass balance. The most usual ice-sheet models only represent rapid ice flow in an approximate fashion and, as a consequence, have never explicitly addressed the role of ice discharge on the total GrIS mass balance, especially at the scale of individual outlet glaciers. Here, 10 we present a new-generation prognostic ice-sheet model which reproduces the current patterns of rapid ice flow. This requires three essential developments: the complete solution of the full system of equations governing ice deformation; an unstructured mesh to usefully resolve outlet glaciers and the use of inverse methods to better constrain poorly known parameters using observations. The modelled ice discharge is in good 15 agreement with observations on the continental scale and for individual outlets. By conducting perturbation experiments, we investigate how current ice loss will endure over the next century. Although we find that increasing ablation tends to reduce outflow and on its own has a stabilising effect, if destabilisation processes maintain themselves over time, current increases in the rate of ice loss are likely to continue. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Portail HAL-ANR (Agence Nationale de la Recherche) Greenland |