Evolution of ice-shelf channels in Antarctic ice shelves
Ice shelves buttress the continental ice flux and mediate ice–ocean interactions. They are often traversed by channels in which basal melting is enhanced, impacting ice-shelf stability. Here, channel evolution is investigated using a transient, three-dimensional full Stokes model and geophysical dat...
Published in: | The Cryosphere |
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2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00016323 2023-05-15T13:41:02+02:00 Evolution of ice-shelf channels in Antarctic ice shelves Drews, R. 2015-06 electronic https://doi.org/10.5194/tc-9-1169-2015 https://noa.gwlb.de/receive/cop_mods_00016323 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016278/tc-9-1169-2015.pdf https://tc.copernicus.org/articles/9/1169/2015/tc-9-1169-2015.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1169-2015 https://noa.gwlb.de/receive/cop_mods_00016323 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016278/tc-9-1169-2015.pdf https://tc.copernicus.org/articles/9/1169/2015/tc-9-1169-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/tc-9-1169-2015 2022-02-08T22:54:12Z Ice shelves buttress the continental ice flux and mediate ice–ocean interactions. They are often traversed by channels in which basal melting is enhanced, impacting ice-shelf stability. Here, channel evolution is investigated using a transient, three-dimensional full Stokes model and geophysical data collected on the Roi Baudouin Ice Shelf (RBIS), Antarctica. The modeling confirms basal melting as a feasible mechanism for channel creation, although channels may also advect without melting for many tens of kilometers. Channels can be out of hydrostatic equilibrium depending on their width and the upstream melt history. Inverting surface elevation for ice thickness using hydrostatic equilibrium in those areas is erroneous, and corresponding observational evidence is presented at RBIS by comparing the hydrostatically inverted ice thickness with radar measurements. The model shows that channelized melting imprints the flow field characteristically, which can result in enhanced horizontal shearing across channels. This is exemplified for a channel at RBIS using observed surface velocities and opens up the possibility to classify channelized melting from space, an important step towards incorporating these effects in ice–ocean models. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic Buttress ENVELOPE(-57.083,-57.083,-63.550,-63.550) Roi Baudouin ENVELOPE(24.461,24.461,-70.438,-70.438) The Cryosphere 9 3 1169 1181 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Drews, R. Evolution of ice-shelf channels in Antarctic ice shelves |
topic_facet |
article Verlagsveröffentlichung |
description |
Ice shelves buttress the continental ice flux and mediate ice–ocean interactions. They are often traversed by channels in which basal melting is enhanced, impacting ice-shelf stability. Here, channel evolution is investigated using a transient, three-dimensional full Stokes model and geophysical data collected on the Roi Baudouin Ice Shelf (RBIS), Antarctica. The modeling confirms basal melting as a feasible mechanism for channel creation, although channels may also advect without melting for many tens of kilometers. Channels can be out of hydrostatic equilibrium depending on their width and the upstream melt history. Inverting surface elevation for ice thickness using hydrostatic equilibrium in those areas is erroneous, and corresponding observational evidence is presented at RBIS by comparing the hydrostatically inverted ice thickness with radar measurements. The model shows that channelized melting imprints the flow field characteristically, which can result in enhanced horizontal shearing across channels. This is exemplified for a channel at RBIS using observed surface velocities and opens up the possibility to classify channelized melting from space, an important step towards incorporating these effects in ice–ocean models. |
format |
Article in Journal/Newspaper |
author |
Drews, R. |
author_facet |
Drews, R. |
author_sort |
Drews, R. |
title |
Evolution of ice-shelf channels in Antarctic ice shelves |
title_short |
Evolution of ice-shelf channels in Antarctic ice shelves |
title_full |
Evolution of ice-shelf channels in Antarctic ice shelves |
title_fullStr |
Evolution of ice-shelf channels in Antarctic ice shelves |
title_full_unstemmed |
Evolution of ice-shelf channels in Antarctic ice shelves |
title_sort |
evolution of ice-shelf channels in antarctic ice shelves |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-1169-2015 https://noa.gwlb.de/receive/cop_mods_00016323 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016278/tc-9-1169-2015.pdf https://tc.copernicus.org/articles/9/1169/2015/tc-9-1169-2015.pdf |
long_lat |
ENVELOPE(-57.083,-57.083,-63.550,-63.550) ENVELOPE(24.461,24.461,-70.438,-70.438) |
geographic |
Antarctic Buttress Roi Baudouin |
geographic_facet |
Antarctic Buttress Roi Baudouin |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-9-1169-2015 https://noa.gwlb.de/receive/cop_mods_00016323 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00016278/tc-9-1169-2015.pdf https://tc.copernicus.org/articles/9/1169/2015/tc-9-1169-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-1169-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
3 |
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1169 |
op_container_end_page |
1181 |
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1766144986845282304 |