Basal friction of Fleming Glacier, Antarctica - Part 1: sensitivity of inversion to temperature and bedrock uncertainty
Many glaciers in the Antarctic Peninsula are nowrapidly losing mass. Understanding of the dynamics of thesefast-flowing glaciers, and their potential future behaviour,can be improved through ice sheet modelling studies. Inversemethods are commonly used in ice sheet models toinfer the spatial distrib...
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Online Access: | https://doi.org/10.5194/tc-12-2637-2018 http://ecite.utas.edu.au/127892 |
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ftunivtasecite:oai:ecite.utas.edu.au:127892 2023-05-15T13:55:18+02:00 Basal friction of Fleming Glacier, Antarctica - Part 1: sensitivity of inversion to temperature and bedrock uncertainty Zhao, C Gladstone, RM Warner, RC King, MA Zwinger, T Morlighem, M 2018 application/pdf https://doi.org/10.5194/tc-12-2637-2018 http://ecite.utas.edu.au/127892 en eng Copernicus GmbH http://ecite.utas.edu.au/127892/2/127892 - Basal friction of Fleming Glacier, Antarctica Part 1.pdf http://dx.doi.org/10.5194/tc-12-2637-2018 Zhao, C and Gladstone, RM and Warner, RC and King, MA and Zwinger, T and Morlighem, M, Basal friction of Fleming Glacier, Antarctica - Part 1: sensitivity of inversion to temperature and bedrock uncertainty, The Cryosphere, 12, (8) pp. 2637-2652. ISSN 1994-0416 (2018) [Refereed Article] http://ecite.utas.edu.au/127892 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2018 ftunivtasecite https://doi.org/10.5194/tc-12-2637-2018 2019-12-13T22:26:07Z Many glaciers in the Antarctic Peninsula are nowrapidly losing mass. Understanding of the dynamics of thesefast-flowing glaciers, and their potential future behaviour,can be improved through ice sheet modelling studies. Inversemethods are commonly used in ice sheet models toinfer 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 tosimulate theWordie Ice ShelfFleming Glacier system in thesouthern Antarctic Peninsula. With an inverse method, weinfer the pattern of the basal friction coefficient from surfacevelocities observed in 2008. We propose a multi-cyclespin-up scheme to reduce the influence of the assumed initialenglacial temperature field on the final inversion. This isparticularly important for glaciers like the Fleming Glacier,which have areas of strongly temperature-dependent deformationalflow in the fast-flowing regions. Sensitivity testsusing various bed elevation datasets, ice front positions andboundary conditions demonstrate the importance of highaccuracyice thickness/bed geometry data and precise locationof the ice front boundary. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet The Cryosphere eCite UTAS (University of Tasmania) Antarctic The Antarctic Antarctic Peninsula Fleming Glacier ENVELOPE(-66.183,-66.183,-69.467,-69.467) The Cryosphere 12 8 2637 2652 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Zhao, C Gladstone, RM Warner, RC King, MA Zwinger, T Morlighem, M Basal friction of Fleming Glacier, Antarctica - Part 1: sensitivity of inversion to temperature and bedrock uncertainty |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Many glaciers in the Antarctic Peninsula are nowrapidly losing mass. Understanding of the dynamics of thesefast-flowing glaciers, and their potential future behaviour,can be improved through ice sheet modelling studies. Inversemethods are commonly used in ice sheet models toinfer 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 tosimulate theWordie Ice ShelfFleming Glacier system in thesouthern Antarctic Peninsula. With an inverse method, weinfer the pattern of the basal friction coefficient from surfacevelocities observed in 2008. We propose a multi-cyclespin-up scheme to reduce the influence of the assumed initialenglacial temperature field on the final inversion. This isparticularly important for glaciers like the Fleming Glacier,which have areas of strongly temperature-dependent deformationalflow in the fast-flowing regions. Sensitivity testsusing various bed elevation datasets, ice front positions andboundary conditions demonstrate the importance of highaccuracyice thickness/bed geometry data and precise locationof the ice front boundary. |
format |
Article in Journal/Newspaper |
author |
Zhao, C Gladstone, RM Warner, RC King, MA Zwinger, T Morlighem, M |
author_facet |
Zhao, C Gladstone, RM Warner, RC King, MA Zwinger, T Morlighem, M |
author_sort |
Zhao, C |
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 GmbH |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-2637-2018 http://ecite.utas.edu.au/127892 |
long_lat |
ENVELOPE(-66.183,-66.183,-69.467,-69.467) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Fleming Glacier |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Fleming Glacier |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet The Cryosphere |
op_relation |
http://ecite.utas.edu.au/127892/2/127892 - Basal friction of Fleming Glacier, Antarctica Part 1.pdf http://dx.doi.org/10.5194/tc-12-2637-2018 Zhao, C and Gladstone, RM and Warner, RC and King, MA and Zwinger, T and Morlighem, M, Basal friction of Fleming Glacier, Antarctica - Part 1: sensitivity of inversion to temperature and bedrock uncertainty, The Cryosphere, 12, (8) pp. 2637-2652. ISSN 1994-0416 (2018) [Refereed Article] http://ecite.utas.edu.au/127892 |
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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1766261680786898944 |