A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution
A three-dimensional, thermo-mechanically coupled ice flow model with induced anisotropy has been applied to a ~200 × 200 km domain around the Dome Fuji drill site, Antarctica. The model ("Elmer/Ice") is based on the open-source multi-physics package Elmer ( http://www.csc.fi/elmer/ ) and s...
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Online Access: | https://doi.org/10.5194/tc-5-495-2011 https://tc.copernicus.org/articles/5/495/2011/ |
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ftcopernicus:oai:publications.copernicus.org:tc7049 2023-05-15T13:36:36+02:00 A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution Seddik, H. Greve, R. Zwinger, T. Placidi, L. 2018-09-27 application/pdf https://doi.org/10.5194/tc-5-495-2011 https://tc.copernicus.org/articles/5/495/2011/ eng eng doi:10.5194/tc-5-495-2011 https://tc.copernicus.org/articles/5/495/2011/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-5-495-2011 2020-07-20T16:26:07Z A three-dimensional, thermo-mechanically coupled ice flow model with induced anisotropy has been applied to a ~200 × 200 km domain around the Dome Fuji drill site, Antarctica. The model ("Elmer/Ice") is based on the open-source multi-physics package Elmer ( http://www.csc.fi/elmer/ ) and solves the full Stokes equations. Flow-induced anisotropy in ice is accounted for by an implementation of the C ontinuum-mechanical, A nisotropic F low model, based on an anisotropic F low E nhancement factor ("CAFFE model"). Steady-state simulations for present-day climate conditions are conducted. The main findings are: (i) the flow regime at Dome Fuji is a complex superposition of vertical compression, horizontal extension and bed-parallel shear; (ii) for an assumed geothermal heat flux of 60 mW m −2 the basal temperature at Dome Fuji reaches the pressure melting point and the basal melting rate is ~0.35 mm a −1 (iii) in agreement with observational data, the fabric shows a strong single maximum at Dome Fuji, and the age of the ice is decreased compared to an isotropic scenario; (iv) as a consequence of spatially variable basal melting conditions, the basal age tends to be smaller where the ice is thicker and larger where the ice is thinner. The latter result is of great relevance for the consideration of a future drill site in the area. Text Antarc* Antarctica Copernicus Publications: E-Journals Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) The Cryosphere 5 2 495 508 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A three-dimensional, thermo-mechanically coupled ice flow model with induced anisotropy has been applied to a ~200 × 200 km domain around the Dome Fuji drill site, Antarctica. The model ("Elmer/Ice") is based on the open-source multi-physics package Elmer ( http://www.csc.fi/elmer/ ) and solves the full Stokes equations. Flow-induced anisotropy in ice is accounted for by an implementation of the C ontinuum-mechanical, A nisotropic F low model, based on an anisotropic F low E nhancement factor ("CAFFE model"). Steady-state simulations for present-day climate conditions are conducted. The main findings are: (i) the flow regime at Dome Fuji is a complex superposition of vertical compression, horizontal extension and bed-parallel shear; (ii) for an assumed geothermal heat flux of 60 mW m −2 the basal temperature at Dome Fuji reaches the pressure melting point and the basal melting rate is ~0.35 mm a −1 (iii) in agreement with observational data, the fabric shows a strong single maximum at Dome Fuji, and the age of the ice is decreased compared to an isotropic scenario; (iv) as a consequence of spatially variable basal melting conditions, the basal age tends to be smaller where the ice is thicker and larger where the ice is thinner. The latter result is of great relevance for the consideration of a future drill site in the area. |
format |
Text |
author |
Seddik, H. Greve, R. Zwinger, T. Placidi, L. |
spellingShingle |
Seddik, H. Greve, R. Zwinger, T. Placidi, L. A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
author_facet |
Seddik, H. Greve, R. Zwinger, T. Placidi, L. |
author_sort |
Seddik, H. |
title |
A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
title_short |
A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
title_full |
A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
title_fullStr |
A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
title_full_unstemmed |
A full Stokes ice flow model for the vicinity of Dome Fuji, Antarctica, with induced anisotropy and fabric evolution |
title_sort |
full stokes ice flow model for the vicinity of dome fuji, antarctica, with induced anisotropy and fabric evolution |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-5-495-2011 https://tc.copernicus.org/articles/5/495/2011/ |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Dome Fuji |
geographic_facet |
Dome Fuji |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-5-495-2011 https://tc.copernicus.org/articles/5/495/2011/ |
op_doi |
https://doi.org/10.5194/tc-5-495-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
2 |
container_start_page |
495 |
op_container_end_page |
508 |
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1766081305242501120 |