Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study
We applied a newly developed three-dimensional, time-dependent, thermomechanical ice-sheet model including higher-order stress gradients, to simulate the ice flow across subglacial Vostok lake, East Antarctica. Simulations of both 'lake' and 'no lake' conditions (by treating the...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/170223 2023-05-15T13:37:29+02:00 Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study Pattyn, Frank De Smedt, Bert Souchez, Roland 2004 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/170223 en eng uri/info:scp/14044277913 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/170223 Journal of Glaciology, 50 (171 Géologie et minéralogie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2004 ftunivbruxelles 2022-06-12T22:09:17Z We applied a newly developed three-dimensional, time-dependent, thermomechanical ice-sheet model including higher-order stress gradients, to simulate the ice flow across subglacial Vostok lake, East Antarctica. Simulations of both 'lake' and 'no lake' conditions (by treating the ice/lake interface as a stress-free surface, similar to an ice shelf) demonstrate the effects of the subglacial lake, such as pronounced surface flattening and ice-flow turning, on the overall ice dynamics in the vicinity, although subglacial lake dynamics are not treated explicitly. When buoyancy forces and hydrostatic equilibrium of the ice above the lake are taken into account, the along-lake surface slope is preserved and the ice-flow pattern is in accord with sparse observations. Model experiments point to a local ice speed-up in the northern part of the lake, which can be associated with the onset of an enhanced ice-flow feature, more precisely the onset of the Totten Glacier catchment. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Journal of Glaciology Totten Glacier DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic East Antarctica The Antarctic Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Vostok Lake ENVELOPE(104.750,104.750,-77.392,-77.392) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Géologie et minéralogie |
spellingShingle |
Géologie et minéralogie Pattyn, Frank De Smedt, Bert Souchez, Roland Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
topic_facet |
Géologie et minéralogie |
description |
We applied a newly developed three-dimensional, time-dependent, thermomechanical ice-sheet model including higher-order stress gradients, to simulate the ice flow across subglacial Vostok lake, East Antarctica. Simulations of both 'lake' and 'no lake' conditions (by treating the ice/lake interface as a stress-free surface, similar to an ice shelf) demonstrate the effects of the subglacial lake, such as pronounced surface flattening and ice-flow turning, on the overall ice dynamics in the vicinity, although subglacial lake dynamics are not treated explicitly. When buoyancy forces and hydrostatic equilibrium of the ice above the lake are taken into account, the along-lake surface slope is preserved and the ice-flow pattern is in accord with sparse observations. Model experiments point to a local ice speed-up in the northern part of the lake, which can be associated with the onset of an enhanced ice-flow feature, more precisely the onset of the Totten Glacier catchment. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Pattyn, Frank De Smedt, Bert Souchez, Roland |
author_facet |
Pattyn, Frank De Smedt, Bert Souchez, Roland |
author_sort |
Pattyn, Frank |
title |
Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
title_short |
Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
title_full |
Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
title_fullStr |
Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
title_full_unstemmed |
Influence of subglacial Vostok lake on the regional ice dynamics of the Antarctic ice sheet: A model study |
title_sort |
influence of subglacial vostok lake on the regional ice dynamics of the antarctic ice sheet: a model study |
publishDate |
2004 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/170223 |
long_lat |
ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(104.750,104.750,-77.392,-77.392) |
geographic |
Antarctic East Antarctica The Antarctic Totten Glacier Vostok Lake |
geographic_facet |
Antarctic East Antarctica The Antarctic Totten Glacier Vostok Lake |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Journal of Glaciology Totten Glacier |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Journal of Glaciology Totten Glacier |
op_source |
Journal of Glaciology, 50 (171 |
op_relation |
uri/info:scp/14044277913 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/170223 |
_version_ |
1766092509529767936 |