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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://research.ulapland.fi/fi/publications/24218005-8396-4561-aca9-9a5b07567f65 https://doi.org/10.5194/tc-12-2637-2018 |
id |
ftulaplandcdispu:oai:lacris.ulapland.fi:publications/24218005-8396-4561-aca9-9a5b07567f65 |
---|---|
record_format |
openpolar |
spelling |
ftulaplandcdispu:oai:lacris.ulapland.fi:publications/24218005-8396-4561-aca9-9a5b07567f65 2024-01-28T09:59:06+01:00 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 2018-08-15 https://research.ulapland.fi/fi/publications/24218005-8396-4561-aca9-9a5b07567f65 https://doi.org/10.5194/tc-12-2637-2018 eng eng https://research.ulapland.fi/fi/publications/24218005-8396-4561-aca9-9a5b07567f65 info:eu-repo/semantics/openAccess Zhao , C , Gladstone , R M , Warner , R C , King , M A , Zwinger , T & Morlighem , M 2018 , ' Basal friction of Fleming Glacier, Antarctica -Part 1 : Sensitivity of inversion to temperature and bedrock uncertainty ' , Cryosphere , vol. 12 , no. 8 , pp. 2637-2652 . https://doi.org/10.5194/tc-12-2637-2018 WORDIE ICE SHELF SHEET MODEL PENINSULA SURFACE SIMULATIONS GREENLAND SVALBARD FLOW DISCHARGE DYNAMICS /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences article 2018 ftulaplandcdispu https://doi.org/10.5194/tc-12-2637-2018 2024-01-04T00:03:21Z 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 theWordie 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 glacier glacier Greenland Ice Sheet Ice Shelf Svalbard Wordie Ice Shelf LaCRIS - University of Lapland Current Research System Antarctic Antarctic Peninsula Fleming Glacier ENVELOPE(-66.183,-66.183,-69.467,-69.467) Greenland Svalbard 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 |
institution |
Open Polar |
collection |
LaCRIS - University of Lapland Current Research System |
op_collection_id |
ftulaplandcdispu |
language |
English |
topic |
WORDIE ICE SHELF SHEET MODEL PENINSULA SURFACE SIMULATIONS GREENLAND SVALBARD FLOW DISCHARGE DYNAMICS /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
spellingShingle |
WORDIE ICE SHELF SHEET MODEL PENINSULA SURFACE SIMULATIONS GREENLAND SVALBARD FLOW DISCHARGE DYNAMICS /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences 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 |
WORDIE ICE SHELF SHEET MODEL PENINSULA SURFACE SIMULATIONS GREENLAND SVALBARD FLOW DISCHARGE DYNAMICS /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
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 theWordie 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 |
publishDate |
2018 |
url |
https://research.ulapland.fi/fi/publications/24218005-8396-4561-aca9-9a5b07567f65 https://doi.org/10.5194/tc-12-2637-2018 |
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 Greenland Svalbard The Antarctic Wordie Wordie Ice Shelf |
geographic_facet |
Antarctic Antarctic Peninsula Fleming Glacier Greenland Svalbard The Antarctic Wordie Wordie Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica glacier glacier Greenland Ice Sheet Ice Shelf Svalbard Wordie Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica glacier glacier Greenland Ice Sheet Ice Shelf Svalbard Wordie Ice Shelf |
op_source |
Zhao , C , Gladstone , R M , Warner , R C , King , M A , Zwinger , T & Morlighem , M 2018 , ' Basal friction of Fleming Glacier, Antarctica -Part 1 : Sensitivity of inversion to temperature and bedrock uncertainty ' , Cryosphere , vol. 12 , no. 8 , pp. 2637-2652 . https://doi.org/10.5194/tc-12-2637-2018 |
op_relation |
https://research.ulapland.fi/fi/publications/24218005-8396-4561-aca9-9a5b07567f65 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
_version_ |
1789332281273352192 |