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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ftvliz:oai:oma.vliz.be:238332 2023-05-15T13:54:14+02:00 Marine ice deformation experiments: an empirical validation of creep parameters Dierckx, M. Tison, J.-L. 2013 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238332 en eng info:eu-repo/semantics/altIdentifier/wos/000317826300025 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2012GL054197 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238332 info:eu-repo/semantics/restrictedAccess %3Ci%3EGeophys.+Res.+Lett.+40%281%29%3C%2Fi%3E%3A+134-138.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2012GL054197%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2012GL054197%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftvliz https://doi.org/10.1029/2012GL054197 2022-05-01T10:15:24Z 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 degrees C, -6 degrees C, and -3 degrees 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. Citation: Dierckx, M., and J.-L. Tison (2013), Marine ice deformation experiments: an empirical validation of creep parameters, Geophys. Res. Lett., 40, 134-138, doi:10.1029/2012GL054197. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Ice Shelves Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Geophysical Research Letters 40 1 134 138 |
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Open Polar |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
language |
English |
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 degrees C, -6 degrees C, and -3 degrees 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. Citation: Dierckx, M., and J.-L. Tison (2013), Marine ice deformation experiments: an empirical validation of creep parameters, Geophys. Res. Lett., 40, 134-138, doi:10.1029/2012GL054197. |
format |
Article in Journal/Newspaper |
author |
Dierckx, M. Tison, J.-L. |
spellingShingle |
Dierckx, M. Tison, J.-L. Marine ice deformation experiments: an empirical validation of creep parameters |
author_facet |
Dierckx, M. Tison, J.-L. |
author_sort |
Dierckx, M. |
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 |
2013 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238332 |
genre |
Antarc* Antarctica Ice Shelf Ice Shelves |
genre_facet |
Antarc* Antarctica Ice Shelf Ice Shelves |
op_source |
%3Ci%3EGeophys.+Res.+Lett.+40%281%29%3C%2Fi%3E%3A+134-138.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2012GL054197%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2012GL054197%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000317826300025 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2012GL054197 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238332 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2012GL054197 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
1 |
container_start_page |
134 |
op_container_end_page |
138 |
_version_ |
1766259919517908992 |