Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core
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 unexpecte...
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ftcopernicus:oai:publications.copernicus.org:cp6239 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, G. Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. 2018-09-27 application/pdf https://doi.org/10.5194/cp-3-155-2007 https://cp.copernicus.org/articles/3/155/2007/ eng eng doi:10.5194/cp-3-155-2007 https://cp.copernicus.org/articles/3/155/2007/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-3-155-2007 2020-07-20T16:27:07Z 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. Text EPICA ice core Ice Sheet Copernicus Publications: E-Journals Climate of the Past 3 1 155 167 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
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. |
format |
Text |
author |
Durand, G. Gillet-Chaulet, F. Svensson, A. Gagliardini, O. Kipfstuhl, S. Meyssonnier, J. Parrenin, F. Duval, P. Dahl-Jensen, D. |
spellingShingle |
Durand, G. 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 |
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 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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-3-155-2007 https://cp.copernicus.org/articles/3/155/2007/ |
genre |
EPICA ice core Ice Sheet |
genre_facet |
EPICA ice core Ice Sheet |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-3-155-2007 https://cp.copernicus.org/articles/3/155/2007/ |
op_doi |
https://doi.org/10.5194/cp-3-155-2007 |
container_title |
Climate of the Past |
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3 |
container_issue |
1 |
container_start_page |
155 |
op_container_end_page |
167 |
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1766402152576581632 |