Marine ice deformation experiments: an empirical validation of creep parameters
Marine ice is increasingly recognized as an important component of ice shelves in Antarctica. Because it mainly accretes in "weak" locations, it plays a crucial role in ice shelf stability. Little is known however on the rheology of this particular material (low salinity, no bubbles, speci...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/156280 2023-05-15T13:44:43+02:00 Marine ice deformation experiments: an empirical validation of creep parameters Dierckx, Marie Tison, Jean-Louis 2012 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156280 https://dipot.ulb.ac.be/dspace/bitstream/2013/156280/3/156280.pdf en eng uri/info:doi/10.1029/2012GL054197 uri/info:scp/84874897032 https://dipot.ulb.ac.be/dspace/bitstream/2013/156280/3/156280.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156280 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Geophysical research letters, 40 (1 Glaciologie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2012 ftunivbruxelles 2022-06-12T21:11:27Z Marine ice is increasingly recognized as an important component of ice shelves in Antarctica. Because it mainly accretes in "weak" locations, it plays a crucial role in ice shelf stability. Little is known however on the rheology of this particular material (low salinity, no bubbles, specific fabrics). We present marine ice deformation experiments in unconfined uniaxial compression at -10 °C, -6 °C, and -3 °C. Generally, marine ice samples confirm the value of n=3 for Glen's power law. It also appears to behave systematically "harder" than artificial or meteoric isotropic ice samples used in the past, in the studied stress condition. Bulk salinity does not seem to have a significant impact on the viscosity. All deformation curves compare well with a generalized empirical temperature/viscosity relationship. They represent the first experimental validation of the lower boundary of this rheological relationship recommended for use in modeling ice dynamics. © 2013. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j FLWIN info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Ice Shelves DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Glaciologie |
spellingShingle |
Glaciologie Dierckx, Marie Tison, Jean-Louis Marine ice deformation experiments: an empirical validation of creep parameters |
topic_facet |
Glaciologie |
description |
Marine ice is increasingly recognized as an important component of ice shelves in Antarctica. Because it mainly accretes in "weak" locations, it plays a crucial role in ice shelf stability. Little is known however on the rheology of this particular material (low salinity, no bubbles, specific fabrics). We present marine ice deformation experiments in unconfined uniaxial compression at -10 °C, -6 °C, and -3 °C. Generally, marine ice samples confirm the value of n=3 for Glen's power law. It also appears to behave systematically "harder" than artificial or meteoric isotropic ice samples used in the past, in the studied stress condition. Bulk salinity does not seem to have a significant impact on the viscosity. All deformation curves compare well with a generalized empirical temperature/viscosity relationship. They represent the first experimental validation of the lower boundary of this rheological relationship recommended for use in modeling ice dynamics. © 2013. American Geophysical Union. All Rights Reserved. SCOPUS: ar.j FLWIN info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Dierckx, Marie Tison, Jean-Louis |
author_facet |
Dierckx, Marie Tison, Jean-Louis |
author_sort |
Dierckx, Marie |
title |
Marine ice deformation experiments: an empirical validation of creep parameters |
title_short |
Marine ice deformation experiments: an empirical validation of creep parameters |
title_full |
Marine ice deformation experiments: an empirical validation of creep parameters |
title_fullStr |
Marine ice deformation experiments: an empirical validation of creep parameters |
title_full_unstemmed |
Marine ice deformation experiments: an empirical validation of creep parameters |
title_sort |
marine ice deformation experiments: an empirical validation of creep parameters |
publishDate |
2012 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156280 https://dipot.ulb.ac.be/dspace/bitstream/2013/156280/3/156280.pdf |
genre |
Antarc* Antarctica Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctica Ice Shelf Ice Shelves |
op_source |
Geophysical research letters, 40 (1 |
op_relation |
uri/info:doi/10.1029/2012GL054197 uri/info:scp/84874897032 https://dipot.ulb.ac.be/dspace/bitstream/2013/156280/3/156280.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156280 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766205125813075968 |