The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling
An interpolated bedrock topography is presented for Flask Glacier, one of the tributaries of the remnant part of the Larsen B ice shelf, Antarctic Peninsula. The ice thickness distribution is derived by combining direct but sparse measurements from airborne radio-echo soundings with indirect estimat...
Published in: | Annals of Glaciology |
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Language: | English |
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International Glaciological Society
2013
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Online Access: | http://nora.nerc.ac.uk/id/eprint/18211/ https://nora.nerc.ac.uk/id/eprint/18211/1/s3.pdf |
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ftnerc:oai:nora.nerc.ac.uk:18211 2023-05-15T13:29:45+02:00 The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling Farinotti, Daniel Corr, Hugh Gudmundsson, G. Hilmar 2013-06 text http://nora.nerc.ac.uk/id/eprint/18211/ https://nora.nerc.ac.uk/id/eprint/18211/1/s3.pdf en eng International Glaciological Society https://nora.nerc.ac.uk/id/eprint/18211/1/s3.pdf Farinotti, Daniel; Corr, Hugh; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 . 2013 The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling. Annals of Glaciology, 54 (63). 18-24. https://doi.org/10.3189/2013AoG63A603 <https://doi.org/10.3189/2013AoG63A603> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.3189/2013AoG63A603 2023-02-04T19:31:34Z An interpolated bedrock topography is presented for Flask Glacier, one of the tributaries of the remnant part of the Larsen B ice shelf, Antarctic Peninsula. The ice thickness distribution is derived by combining direct but sparse measurements from airborne radio-echo soundings with indirect estimates obtained from ice-flow modelling. The ice-flow model is applied to a series of transverse profiles, and a first estimate of the bedrock is iteratively adjusted until agreement between modelled and measured surface velocities is achieved. The adjusted bedrock is then used to reinterpret the radio-echo soundings, and the recovered information used to further improve the estimate of the bedrock itself. The ice flux along the glacier center line provides an additional and independent constraint on the ice thickness. The resulting bedrock topography reveals a glacier bed situated mainly below sea level with sections having retrograde slope. The total ice volume of 120±15 km3 for the considered area of 215 km2 corresponds to an average ice thickness of 560±70 m. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Flask Glacier ENVELOPE(-62.792,-62.792,-65.762,-65.762) Annals of Glaciology 54 63 18 24 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
An interpolated bedrock topography is presented for Flask Glacier, one of the tributaries of the remnant part of the Larsen B ice shelf, Antarctic Peninsula. The ice thickness distribution is derived by combining direct but sparse measurements from airborne radio-echo soundings with indirect estimates obtained from ice-flow modelling. The ice-flow model is applied to a series of transverse profiles, and a first estimate of the bedrock is iteratively adjusted until agreement between modelled and measured surface velocities is achieved. The adjusted bedrock is then used to reinterpret the radio-echo soundings, and the recovered information used to further improve the estimate of the bedrock itself. The ice flux along the glacier center line provides an additional and independent constraint on the ice thickness. The resulting bedrock topography reveals a glacier bed situated mainly below sea level with sections having retrograde slope. The total ice volume of 120±15 km3 for the considered area of 215 km2 corresponds to an average ice thickness of 560±70 m. |
format |
Article in Journal/Newspaper |
author |
Farinotti, Daniel Corr, Hugh Gudmundsson, G. Hilmar |
spellingShingle |
Farinotti, Daniel Corr, Hugh Gudmundsson, G. Hilmar The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
author_facet |
Farinotti, Daniel Corr, Hugh Gudmundsson, G. Hilmar |
author_sort |
Farinotti, Daniel |
title |
The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
title_short |
The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
title_full |
The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
title_fullStr |
The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
title_full_unstemmed |
The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
title_sort |
ice thickness distribution of flask glacier, antarctic peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling |
publisher |
International Glaciological Society |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/18211/ https://nora.nerc.ac.uk/id/eprint/18211/1/s3.pdf |
long_lat |
ENVELOPE(-62.792,-62.792,-65.762,-65.762) |
geographic |
Antarctic Antarctic Peninsula Flask Glacier |
geographic_facet |
Antarctic Antarctic Peninsula Flask Glacier |
genre |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctic Peninsula Flask Glacier Ice Shelf |
op_relation |
https://nora.nerc.ac.uk/id/eprint/18211/1/s3.pdf Farinotti, Daniel; Corr, Hugh; Gudmundsson, G. Hilmar orcid:0000-0003-4236-5369 . 2013 The ice thickness distribution of Flask Glacier, Antarctic Peninsula, determined by combining radio-echo soundings, surface velocity data and flow modelling. Annals of Glaciology, 54 (63). 18-24. https://doi.org/10.3189/2013AoG63A603 <https://doi.org/10.3189/2013AoG63A603> |
op_doi |
https://doi.org/10.3189/2013AoG63A603 |
container_title |
Annals of Glaciology |
container_volume |
54 |
container_issue |
63 |
container_start_page |
18 |
op_container_end_page |
24 |
_version_ |
1766002617626918912 |