Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty
Many glaciers in the Antarctic Peninsula are now rapidly losing mass. Understanding of the dynamics of these fast-flowing glaciers, and their potential future behaviour, can be improved through ice sheet modelling studies. Inverse methods are commonly used in ice sheet models to infer the spatial di...
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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005088 2023-05-15T13:34:49+02:00 Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty Zhao, Chen Gladstone, Rupert M. Warner, Roland C. King, Matt A. Zwinger, Thomas Morlighem, Mathieu 2018-08 electronic https://doi.org/10.5194/tc-12-2637-2018 https://noa.gwlb.de/receive/cop_mods_00005088 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005045/tc-12-2637-2018.pdf https://tc.copernicus.org/articles/12/2637/2018/tc-12-2637-2018.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-12-2637-2018 https://noa.gwlb.de/receive/cop_mods_00005088 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005045/tc-12-2637-2018.pdf https://tc.copernicus.org/articles/12/2637/2018/tc-12-2637-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/tc-12-2637-2018 2022-02-08T22:59:45Z Many glaciers in the Antarctic Peninsula are now rapidly losing mass. Understanding of the dynamics of these fast-flowing glaciers, and their potential future behaviour, can be improved through ice sheet modelling studies. Inverse methods are commonly used in ice sheet models to infer the spatial distribution of a basal friction coefficient, which has a large effect on the basal velocity and ice deformation. Here we use the full-Stokes Elmer/Ice model to simulate the Wordie Ice Shelf–Fleming Glacier system in the southern Antarctic Peninsula. With an inverse method, we infer the pattern of the basal friction coefficient from surface velocities observed in 2008. We propose a multi-cycle spin-up scheme to reduce the influence of the assumed initial englacial temperature field on the final inversion. This is particularly important for glaciers like the Fleming Glacier, which have areas of strongly temperature-dependent deformational flow in the fast-flowing regions. Sensitivity tests using various bed elevation datasets, ice front positions and boundary conditions demonstrate the importance of high-accuracy ice thickness/bed geometry data and precise location of the ice front boundary. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf The Cryosphere Wordie Ice Shelf Niedersächsisches Online-Archiv NOA Antarctic Antarctic Peninsula Fleming Glacier ENVELOPE(-66.183,-66.183,-69.467,-69.467) The Antarctic Wordie ENVELOPE(-67.500,-67.500,-69.167,-69.167) Wordie Ice Shelf ENVELOPE(-67.750,-67.750,-69.250,-69.250) The Cryosphere 12 8 2637 2652 |
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Niedersächsisches Online-Archiv NOA |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Zhao, Chen Gladstone, Rupert M. Warner, Roland C. King, Matt A. Zwinger, Thomas Morlighem, Mathieu Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
topic_facet |
article Verlagsveröffentlichung |
description |
Many glaciers in the Antarctic Peninsula are now rapidly losing mass. Understanding of the dynamics of these fast-flowing glaciers, and their potential future behaviour, can be improved through ice sheet modelling studies. Inverse methods are commonly used in ice sheet models to infer the spatial distribution of a basal friction coefficient, which has a large effect on the basal velocity and ice deformation. Here we use the full-Stokes Elmer/Ice model to simulate the Wordie Ice Shelf–Fleming Glacier system in the southern Antarctic Peninsula. With an inverse method, we infer the pattern of the basal friction coefficient from surface velocities observed in 2008. We propose a multi-cycle spin-up scheme to reduce the influence of the assumed initial englacial temperature field on the final inversion. This is particularly important for glaciers like the Fleming Glacier, which have areas of strongly temperature-dependent deformational flow in the fast-flowing regions. Sensitivity tests using various bed elevation datasets, ice front positions and boundary conditions demonstrate the importance of high-accuracy ice thickness/bed geometry data and precise location of the ice front boundary. |
format |
Article in Journal/Newspaper |
author |
Zhao, Chen Gladstone, Rupert M. Warner, Roland C. King, Matt A. Zwinger, Thomas Morlighem, Mathieu |
author_facet |
Zhao, Chen Gladstone, Rupert M. Warner, Roland C. King, Matt A. Zwinger, Thomas Morlighem, Mathieu |
author_sort |
Zhao, Chen |
title |
Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
title_short |
Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
title_full |
Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
title_fullStr |
Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
title_full_unstemmed |
Basal friction of Fleming Glacier, Antarctica – Part 1: Sensitivity of inversion to temperature and bedrock uncertainty |
title_sort |
basal friction of fleming glacier, antarctica – part 1: sensitivity of inversion to temperature and bedrock uncertainty |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-2637-2018 https://noa.gwlb.de/receive/cop_mods_00005088 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005045/tc-12-2637-2018.pdf https://tc.copernicus.org/articles/12/2637/2018/tc-12-2637-2018.pdf |
long_lat |
ENVELOPE(-66.183,-66.183,-69.467,-69.467) ENVELOPE(-67.500,-67.500,-69.167,-69.167) ENVELOPE(-67.750,-67.750,-69.250,-69.250) |
geographic |
Antarctic Antarctic Peninsula Fleming Glacier The Antarctic Wordie Wordie Ice Shelf |
geographic_facet |
Antarctic Antarctic Peninsula Fleming Glacier The Antarctic Wordie Wordie Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf The Cryosphere Wordie Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Ice Shelf The Cryosphere Wordie Ice Shelf |
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-12-2637-2018 https://noa.gwlb.de/receive/cop_mods_00005088 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005045/tc-12-2637-2018.pdf https://tc.copernicus.org/articles/12/2637/2018/tc-12-2637-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-12-2637-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
8 |
container_start_page |
2637 |
op_container_end_page |
2652 |
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1766058251091181568 |