Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry
It has been shown recently that ice streams are fed by fast-flowing tributaries occupying well-defined subglacial troughs and with shared source areas. Here, ice-penetrating radio-echo sounding (RES) data are analyzed in conjunction with ice surface velocities derived from interferometric synthetic...
Published in: | Annals of Glaciology |
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Online Access: | http://hdl.handle.net/1983/1168 https://research-information.bris.ac.uk/en/publications/89a003d4-d254-4f9f-8970-db6e632eb095 https://doi.org/10.3189/172756403781816022 https://research-information.bris.ac.uk/ws/files/3006830/s58.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/89a003d4-d254-4f9f-8970-db6e632eb095 2024-02-11T09:55:38+01:00 Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry Siegert, MJ Payne, AJ Joughin, I 2003-06-01 application/pdf http://hdl.handle.net/1983/1168 https://research-information.bris.ac.uk/en/publications/89a003d4-d254-4f9f-8970-db6e632eb095 https://doi.org/10.3189/172756403781816022 https://research-information.bris.ac.uk/ws/files/3006830/s58.pdf eng eng info:eu-repo/semantics/openAccess Siegert , MJ , Payne , AJ & Joughin , I 2003 , ' Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry ' , Annals of Glaciology , vol. 37 , no. 1 , pp. 377 - 382 . https://doi.org/10.3189/172756403781816022 article 2003 ftubristolcris https://doi.org/10.3189/172756403781816022 2024-01-25T23:28:55Z It has been shown recently that ice streams are fed by fast-flowing tributaries occupying well-defined subglacial troughs and with shared source areas. Here, ice-penetrating radio-echo sounding (RES) data are analyzed in conjunction with ice surface velocities derived from interferometric synthetic aperture radar (InSAR), to determine the englacial properties of tributaries feeding Ice Stream D, West Antarctica. All of Ice Stream D's tributaries are coincident with "buckled" internal ice-sheet layers, most probably deformed by the processes responsible for enhanced ice flow. Between the tributaries well-preserved internal layers occur. The data reveal that no lateral migration of the ice-stream tributaries has occurred recently. This is consistent with thermomechanical ice-flow modelling, which indicates that the flow of Ice Stream D is controlled by a subglacial trough and is unaffected by changes to the flow of neighbouring Ice Stream C. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica Ice Sheet Ice Stream C Ice Stream D West Antarctica University of Bristol: Bristol Research West Antarctica Annals of Glaciology 37 377 382 |
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Open Polar |
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University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
It has been shown recently that ice streams are fed by fast-flowing tributaries occupying well-defined subglacial troughs and with shared source areas. Here, ice-penetrating radio-echo sounding (RES) data are analyzed in conjunction with ice surface velocities derived from interferometric synthetic aperture radar (InSAR), to determine the englacial properties of tributaries feeding Ice Stream D, West Antarctica. All of Ice Stream D's tributaries are coincident with "buckled" internal ice-sheet layers, most probably deformed by the processes responsible for enhanced ice flow. Between the tributaries well-preserved internal layers occur. The data reveal that no lateral migration of the ice-stream tributaries has occurred recently. This is consistent with thermomechanical ice-flow modelling, which indicates that the flow of Ice Stream D is controlled by a subglacial trough and is unaffected by changes to the flow of neighbouring Ice Stream C. |
format |
Article in Journal/Newspaper |
author |
Siegert, MJ Payne, AJ Joughin, I |
spellingShingle |
Siegert, MJ Payne, AJ Joughin, I Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
author_facet |
Siegert, MJ Payne, AJ Joughin, I |
author_sort |
Siegert, MJ |
title |
Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
title_short |
Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
title_full |
Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
title_fullStr |
Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
title_full_unstemmed |
Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry |
title_sort |
spatial stability of ice stream d and its tributaries, west antarctica, revealed by radio-echo sounding and interferometry |
publishDate |
2003 |
url |
http://hdl.handle.net/1983/1168 https://research-information.bris.ac.uk/en/publications/89a003d4-d254-4f9f-8970-db6e632eb095 https://doi.org/10.3189/172756403781816022 https://research-information.bris.ac.uk/ws/files/3006830/s58.pdf |
geographic |
West Antarctica |
geographic_facet |
West Antarctica |
genre |
Annals of Glaciology Antarc* Antarctica Ice Sheet Ice Stream C Ice Stream D West Antarctica |
genre_facet |
Annals of Glaciology Antarc* Antarctica Ice Sheet Ice Stream C Ice Stream D West Antarctica |
op_source |
Siegert , MJ , Payne , AJ & Joughin , I 2003 , ' Spatial stability of Ice Stream D and its tributaries, West Antarctica, revealed by radio-echo sounding and interferometry ' , Annals of Glaciology , vol. 37 , no. 1 , pp. 377 - 382 . https://doi.org/10.3189/172756403781816022 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756403781816022 |
container_title |
Annals of Glaciology |
container_volume |
37 |
container_start_page |
377 |
op_container_end_page |
382 |
_version_ |
1790597999065300992 |