Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core
International audience The study of the distribution of the crystallographic orientations (the fabric) along ice cores supplies information on the past and current ice flows of ice-sheets. Beside the usually observed formation of a vertical single maximum fabric, the EPICA Dome Concordia ice core (E...
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ftunigrenoble:oai:HAL:hal-00330717v1 2024-05-12T08:03:13+00:00 Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core Durand, G. 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 (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) 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) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association 2006-11-20 https://hal.science/hal-00330717 https://hal.science/hal-00330717/document https://hal.science/hal-00330717/file/cpd-2-1187-2006.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00330717 https://hal.science/hal-00330717 https://hal.science/hal-00330717/document https://hal.science/hal-00330717/file/cpd-2-1187-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00330717 Climate of the Past Discussions, 2006, 2 (6), pp.1187-1219 [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 2006 ftunigrenoble 2024-04-18T03:16:11Z International audience The study of the distribution of the crystallographic orientations (the fabric) along ice cores supplies information on the past and current ice flows of ice-sheets. Beside the usually observed formation of a vertical single maximum fabric, the EPICA Dome Concordia ice core (EDC) shows an abrupt and unexpected strenghtening of its fabric during termination II around 1750 m depth. Such strengthenings were already observed for sites located on an ice-sheet. This suggests that horizontal shear could occur along the EDC core. Moreover, the change in the fabric leads to a modification of the viscosity between neighbouring ice layers. Through the use of an anisotropic ice flow model, we quantify the change in viscosity and investigate its implication on ice flow and dating. Article in Journal/Newspaper EPICA ice core Ice Sheet Université Grenoble Alpes: HAL |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
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, G. Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. Change of the ice rheology with climatic transitions – implication on 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 the crystallographic orientations (the fabric) along ice cores supplies information on the past and current ice flows of ice-sheets. Beside the usually observed formation of a vertical single maximum fabric, the EPICA Dome Concordia ice core (EDC) shows an abrupt and unexpected strenghtening of its fabric during termination II around 1750 m depth. Such strengthenings were already observed for sites located on an ice-sheet. This suggests that horizontal shear could occur along the EDC core. Moreover, the change in the fabric leads to a modification of the viscosity between neighbouring ice layers. Through the use of an anisotropic ice flow model, we quantify the change in viscosity and investigate its implication on ice flow and dating. |
author2 |
Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) 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) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association |
format |
Article in Journal/Newspaper |
author |
Durand, G. Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. |
author_facet |
Durand, G. Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. |
author_sort |
Durand, G. |
title |
Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core |
title_short |
Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core |
title_full |
Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core |
title_fullStr |
Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core |
title_full_unstemmed |
Change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the EPICA Dome C core |
title_sort |
change of the ice rheology with climatic transitions – implication on ice flow modelling and dating of the epica dome c core |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00330717 https://hal.science/hal-00330717/document https://hal.science/hal-00330717/file/cpd-2-1187-2006.pdf |
genre |
EPICA ice core Ice Sheet |
genre_facet |
EPICA ice core Ice Sheet |
op_source |
ISSN: 1814-9340 EISSN: 1814-9359 Climate of the Past Discussions https://hal.science/hal-00330717 Climate of the Past Discussions, 2006, 2 (6), pp.1187-1219 |
op_relation |
hal-00330717 https://hal.science/hal-00330717 https://hal.science/hal-00330717/document https://hal.science/hal-00330717/file/cpd-2-1187-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1798845326867562496 |