Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core
International audience The study of the distribution of crystallographic orientations (i.e., the fabric) along ice cores provides information on past and current ice flow in ice-sheets. Besides the usually observed formation of a vertical single maximum fabric, the EPICA Dome C ice core (EDC) shows...
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ftccsdartic:oai:HAL:hal-00330748v1 2023-05-15T16:06:15+02:00 Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core Durand, Geoffroy Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU) 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) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 2007-03-19 https://hal.archives-ouvertes.fr/hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748/document https://hal.archives-ouvertes.fr/hal-00330748/file/cp-3-155-2007.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748/document https://hal.archives-ouvertes.fr/hal-00330748/file/cp-3-155-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-00330748 Climate of the Past, European Geosciences Union (EGU), 2007, 3 (1), pp.155-167 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftccsdartic 2021-10-24T20:40:56Z International audience The study of the distribution of crystallographic orientations (i.e., the fabric) along ice cores provides information on past and current ice flow in ice-sheets. Besides the usually observed formation of a vertical single maximum fabric, the EPICA Dome C ice core (EDC) shows an abrupt and unexpected strengthening of its fabric during termination II around 1750 m depth. Such strengthening has already been observed for sites located on an ice-sheet flank. This suggests that horizontal shear could occur along the EDC core. Moreover, the change in the fabric leads to a modification of the effective viscosity between neighbouring ice layers. Through the use of an anisotropic ice flow model, we quantify the change in effective viscosity and investigate its implication for ice flow and dating. Article in Journal/Newspaper EPICA ice core Ice Sheet Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Durand, Geoffroy Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The study of the distribution of crystallographic orientations (i.e., the fabric) along ice cores provides information on past and current ice flow in ice-sheets. Besides the usually observed formation of a vertical single maximum fabric, the EPICA Dome C ice core (EDC) shows an abrupt and unexpected strengthening of its fabric during termination II around 1750 m depth. Such strengthening has already been observed for sites located on an ice-sheet flank. This suggests that horizontal shear could occur along the EDC core. Moreover, the change in the fabric leads to a modification of the effective viscosity between neighbouring ice layers. Through the use of an anisotropic ice flow model, we quantify the change in effective viscosity and investigate its implication for ice flow and dating. |
author2 |
Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU) 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) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) |
format |
Article in Journal/Newspaper |
author |
Durand, Geoffroy Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. |
author_facet |
Durand, Geoffroy Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. |
author_sort |
Durand, Geoffroy |
title |
Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
title_short |
Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
title_full |
Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
title_fullStr |
Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
title_full_unstemmed |
Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
title_sort |
change in ice rheology during climate variations – implications for ice flow modelling and dating of the epica dome c core |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.archives-ouvertes.fr/hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748/document https://hal.archives-ouvertes.fr/hal-00330748/file/cp-3-155-2007.pdf |
genre |
EPICA ice core Ice Sheet |
genre_facet |
EPICA ice core Ice Sheet |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.archives-ouvertes.fr/hal-00330748 Climate of the Past, European Geosciences Union (EGU), 2007, 3 (1), pp.155-167 |
op_relation |
hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748 https://hal.archives-ouvertes.fr/hal-00330748/document https://hal.archives-ouvertes.fr/hal-00330748/file/cp-3-155-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766402154484989952 |