Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations
International audience The Greenland Ice Sheet (GrIS) has been increasingly loosing mass during the last two decades, enhancing its contribution to sea level rise. The total mass balance of an ice sheet is equal to the surface mass balance minus the discharge (ice flux to the ocean). Both terms are...
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HAL CCSD
2012
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Online Access: | https://hal.inria.fr/hal-00715824 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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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 Nodet, Maëlle Ritz, Catherine Durand, Gaël Zwinger, Thomas Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
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 The Greenland Ice Sheet (GrIS) has been increasingly loosing mass during the last two decades, enhancing its contribution to sea level rise. The total mass balance of an ice sheet is equal to the surface mass balance minus the discharge (ice flux to the ocean). Both terms are contributing increasingly to the observed GrIS imbalance. Here, we use use the new generation continental scale ice-sheet model Elmer/Ice with (1) an unstructured mesh allowing to model outlet glaciers with a sufficient resolution; (2) a complete resolution of the full system of equations governing the ice flow and (3) inverse methods to better constrain poorly known parameters from observations. As a first result, we show that our model can reproduce the currently observed ice dynamics and the currently observed ice discharge. We then study the sensitivity of the GrIS to surface mass balance. The model is forced by three different Regional Climate Models (RCMs) both for the ERA-Interim period and for prognostic runs 200 years into the future under emission scenarios A1B and E1, following the experimental setups designed for the ice2sea simulations. These imposed surface mass balance forcings significantly differ in terms of total values and trends, and we show that it directly affects the predicted total ice volume. In the absence of perturbation of the basal and seaward boundary conditions, the difference in the predicted ice discharge remains small. We finally investigate the dynamical response of the ice sheet to changes in basal lubrication by linking the basal sliding to surface run-off anomalies, according to the ice2sea experiments |
author2 |
EDGe 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)-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) 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) |
format |
Conference Object |
author |
Gillet-Chaulet, Fabien Gagliardini, Olivier Nodet, Maëlle Ritz, Catherine Durand, Gaël Zwinger, Thomas |
author_facet |
Gillet-Chaulet, Fabien Gagliardini, Olivier Nodet, Maëlle Ritz, Catherine Durand, Gaël Zwinger, Thomas |
author_sort |
Gillet-Chaulet, Fabien |
title |
Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
title_short |
Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
title_full |
Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
title_fullStr |
Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
title_full_unstemmed |
Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations |
title_sort |
greenland ice sheet sensitivity to surface mass balance forcing using high resolution full-stokes simulations |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.inria.fr/hal-00715824 |
op_coverage |
Vienna, Austria |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
EGU General Assembly https://hal.inria.fr/hal-00715824 EGU General Assembly, Apr 2012, Vienna, Austria |
op_relation |
hal-00715824 https://hal.inria.fr/hal-00715824 |
_version_ |
1766018091564662784 |
spelling |
ftccsdartic:oai:HAL:hal-00715824v1 2023-05-15T16:28:26+02:00 Greenland Ice Sheet sensitivity to surface mass balance forcing using high resolution full-Stokes simulations Gillet-Chaulet, Fabien Gagliardini, Olivier Nodet, Maëlle Ritz, Catherine Durand, Gaël Zwinger, Thomas EDGe 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)-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) 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) Vienna, Austria 2012-04-22 https://hal.inria.fr/hal-00715824 en eng HAL CCSD hal-00715824 https://hal.inria.fr/hal-00715824 EGU General Assembly https://hal.inria.fr/hal-00715824 EGU General Assembly, Apr 2012, Vienna, Austria [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/conferenceObject Conference papers 2012 ftccsdartic 2021-10-24T16:18:19Z International audience The Greenland Ice Sheet (GrIS) has been increasingly loosing mass during the last two decades, enhancing its contribution to sea level rise. The total mass balance of an ice sheet is equal to the surface mass balance minus the discharge (ice flux to the ocean). Both terms are contributing increasingly to the observed GrIS imbalance. Here, we use use the new generation continental scale ice-sheet model Elmer/Ice with (1) an unstructured mesh allowing to model outlet glaciers with a sufficient resolution; (2) a complete resolution of the full system of equations governing the ice flow and (3) inverse methods to better constrain poorly known parameters from observations. As a first result, we show that our model can reproduce the currently observed ice dynamics and the currently observed ice discharge. We then study the sensitivity of the GrIS to surface mass balance. The model is forced by three different Regional Climate Models (RCMs) both for the ERA-Interim period and for prognostic runs 200 years into the future under emission scenarios A1B and E1, following the experimental setups designed for the ice2sea simulations. These imposed surface mass balance forcings significantly differ in terms of total values and trends, and we show that it directly affects the predicted total ice volume. In the absence of perturbation of the basal and seaward boundary conditions, the difference in the predicted ice discharge remains small. We finally investigate the dynamical response of the ice sheet to changes in basal lubrication by linking the basal sliding to surface run-off anomalies, according to the ice2sea experiments Conference Object Greenland Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Greenland |