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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ftdoajarticles:oai:doaj.org/article:42090e5b14234acf87076604d593f959 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 G. Durand F. Gillet-Chaulet A. Svensson O. Gagliardini S. Kipfstuhl J. Meyssonnier F. Parrenin P. Duval D. Dahl-Jensen 2007-01-01T00:00:00Z https://doaj.org/article/42090e5b14234acf87076604d593f959 EN eng Copernicus Publications http://www.clim-past.net/3/155/2007/cp-3-155-2007.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 https://doaj.org/article/42090e5b14234acf87076604d593f959 Climate of the Past, Vol 3, Iss 1, Pp 155-167 (2007) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2007 ftdoajarticles 2022-12-30T21:46:29Z 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 Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 G. Durand F. Gillet-Chaulet A. Svensson O. Gagliardini S. Kipfstuhl J. Meyssonnier F. Parrenin P. Duval D. Dahl-Jensen Change in ice rheology during climate variations – implications for ice flow modelling and dating of the EPICA Dome C core |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 |
Article in Journal/Newspaper |
author |
G. Durand F. Gillet-Chaulet A. Svensson O. Gagliardini S. Kipfstuhl J. Meyssonnier F. Parrenin P. Duval D. Dahl-Jensen |
author_facet |
G. Durand F. Gillet-Chaulet A. Svensson O. Gagliardini S. Kipfstuhl J. Meyssonnier F. Parrenin P. Duval D. Dahl-Jensen |
author_sort |
G. Durand |
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 |
Copernicus Publications |
publishDate |
2007 |
url |
https://doaj.org/article/42090e5b14234acf87076604d593f959 |
genre |
EPICA ice core Ice Sheet |
genre_facet |
EPICA ice core Ice Sheet |
op_source |
Climate of the Past, Vol 3, Iss 1, Pp 155-167 (2007) |
op_relation |
http://www.clim-past.net/3/155/2007/cp-3-155-2007.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 https://doaj.org/article/42090e5b14234acf87076604d593f959 |
_version_ |
1766402155565023232 |