Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model
International audience Polar ice is known to be one of the most anisotropic natural materials. For a given fabric the polycrystal viscous response is strongly dependent on the actual state of stress and strain rate. Within an ice sheet, grounded-ice parts and ice shelves have completely different st...
Published in: | Journal of Glaciology |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://insu.hal.science/insu-00653459 https://insu.hal.science/insu-00653459/document https://insu.hal.science/insu-00653459/file/enhancement-factors-for-grounded-ice-and-ice-shelves-inferred-from-an-anisotropic-ice-flow-model.pdf https://doi.org/10.3189/002214310794457209 |
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ftanrparis:oai:HAL:insu-00653459v1 |
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Open Polar |
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Portail HAL-ANR (Agence Nationale de la Recherche) |
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ftanrparis |
language |
English |
topic |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
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[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology Ma, Y. Gagliardini, O. Ritz, C. Gillet-Chaulet, F. Durand, Geoffroy Montagnat, M. Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
topic_facet |
[SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology |
description |
International audience Polar ice is known to be one of the most anisotropic natural materials. For a given fabric the polycrystal viscous response is strongly dependent on the actual state of stress and strain rate. Within an ice sheet, grounded-ice parts and ice shelves have completely different stress regimes, so one should expect completely different impacts of ice anisotropy on the flow. The aim of this work is to quantify, through the concept of enhancement factors, the influence of ice anisotropy on the flow of grounded ice and ice shelves. For this purpose, a full-Stokes anisotropic marine ice-sheet flowline model is used to compare isotropic and anisotropic diagnostic velocity fields on a fixed geometry. From these full-Stokes results, we propose a definition of enhancement factors for grounded ice and ice shelves, coherent with the asymptotic models used for these regions. We then estimate realistic values for the enhancement factors induced by ice anisotropy for grounded ice and ice shelves. |
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) 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) 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)-Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.)-Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) EDGe ANR-07-VULN-0009,NEEM,NEEM-FRANCE(2007) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) |
format |
Article in Journal/Newspaper |
author |
Ma, Y. Gagliardini, O. Ritz, C. Gillet-Chaulet, F. Durand, Geoffroy Montagnat, M. |
author_facet |
Ma, Y. Gagliardini, O. Ritz, C. Gillet-Chaulet, F. Durand, Geoffroy Montagnat, M. |
author_sort |
Ma, Y. |
title |
Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
title_short |
Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
title_full |
Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
title_fullStr |
Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
title_full_unstemmed |
Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
title_sort |
enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://insu.hal.science/insu-00653459 https://insu.hal.science/insu-00653459/document https://insu.hal.science/insu-00653459/file/enhancement-factors-for-grounded-ice-and-ice-shelves-inferred-from-an-anisotropic-ice-flow-model.pdf https://doi.org/10.3189/002214310794457209 |
genre |
Ice Sheet Ice Shelves Journal of Glaciology |
genre_facet |
Ice Sheet Ice Shelves Journal of Glaciology |
op_source |
ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://insu.hal.science/insu-00653459 Journal of Glaciology, 2010, 56 (199), pp.805-812(8). ⟨10.3189/002214310794457209⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/002214310794457209 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA insu-00653459 https://insu.hal.science/insu-00653459 https://insu.hal.science/insu-00653459/document https://insu.hal.science/insu-00653459/file/enhancement-factors-for-grounded-ice-and-ice-shelves-inferred-from-an-anisotropic-ice-flow-model.pdf doi:10.3189/002214310794457209 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/002214310794457209 |
container_title |
Journal of Glaciology |
container_volume |
56 |
container_issue |
199 |
container_start_page |
805 |
op_container_end_page |
812 |
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1798847601087348736 |
spelling |
ftanrparis:oai:HAL:insu-00653459v1 2024-05-12T08:05:19+00:00 Enhancement factors for grounded ice and ice shelves inferred from an anisotropic ice-flow model Ma, Y. Gagliardini, O. Ritz, C. Gillet-Chaulet, F. Durand, Geoffroy Montagnat, M. 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) 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) 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)-Institut universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.)-Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) EDGe ANR-07-VULN-0009,NEEM,NEEM-FRANCE(2007) European Project: 226375,EC:FP7:ENV,FP7-ENV-2008-1,ICE2SEA(2009) 2010-12 https://insu.hal.science/insu-00653459 https://insu.hal.science/insu-00653459/document https://insu.hal.science/insu-00653459/file/enhancement-factors-for-grounded-ice-and-ice-shelves-inferred-from-an-anisotropic-ice-flow-model.pdf https://doi.org/10.3189/002214310794457209 en eng HAL CCSD International Glaciological Society info:eu-repo/semantics/altIdentifier/doi/10.3189/002214310794457209 info:eu-repo/grantAgreement/EC/FP7/226375/EU/Ice2sea - estimating the future contribution of continental ice to sea-level rise/ICE2SEA insu-00653459 https://insu.hal.science/insu-00653459 https://insu.hal.science/insu-00653459/document https://insu.hal.science/insu-00653459/file/enhancement-factors-for-grounded-ice-and-ice-shelves-inferred-from-an-anisotropic-ice-flow-model.pdf doi:10.3189/002214310794457209 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0022-1430 EISSN: 1727-5652 Journal of Glaciology https://insu.hal.science/insu-00653459 Journal of Glaciology, 2010, 56 (199), pp.805-812(8). ⟨10.3189/002214310794457209⟩ [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology info:eu-repo/semantics/article Journal articles 2010 ftanrparis https://doi.org/10.3189/002214310794457209 2024-04-16T03:07:52Z International audience Polar ice is known to be one of the most anisotropic natural materials. For a given fabric the polycrystal viscous response is strongly dependent on the actual state of stress and strain rate. Within an ice sheet, grounded-ice parts and ice shelves have completely different stress regimes, so one should expect completely different impacts of ice anisotropy on the flow. The aim of this work is to quantify, through the concept of enhancement factors, the influence of ice anisotropy on the flow of grounded ice and ice shelves. For this purpose, a full-Stokes anisotropic marine ice-sheet flowline model is used to compare isotropic and anisotropic diagnostic velocity fields on a fixed geometry. From these full-Stokes results, we propose a definition of enhancement factors for grounded ice and ice shelves, coherent with the asymptotic models used for these regions. We then estimate realistic values for the enhancement factors induced by ice anisotropy for grounded ice and ice shelves. Article in Journal/Newspaper Ice Sheet Ice Shelves Journal of Glaciology Portail HAL-ANR (Agence Nationale de la Recherche) Journal of Glaciology 56 199 805 812 |