Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams
Subglacial bed conditions exert a significant control on ice stream behavior and evolution, and can be characterized by determining bed roughness from FFT analysis of radar-imaged basal reflectors. Here we assess bed roughness across Institute and Moller ice streams, West Antarctica, and compare our...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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American Geophysical Union
2007
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11682/ https://nora.nerc.ac.uk/id/eprint/11682/1/2007GL031483.pdf http://www.agu.org/journals/gl/gl0721/2007GL031483/2007GL031483.pdf |
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ftnerc:oai:nora.nerc.ac.uk:11682 2023-05-15T13:45:10+02:00 Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams Bingham, Robert G. Siegert, Martin J. 2007 text http://nora.nerc.ac.uk/id/eprint/11682/ https://nora.nerc.ac.uk/id/eprint/11682/1/2007GL031483.pdf http://www.agu.org/journals/gl/gl0721/2007GL031483/2007GL031483.pdf en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/11682/1/2007GL031483.pdf Bingham, Robert G.; Siegert, Martin J. 2007 Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams. Geophysical Research Letters, 34 (21), L21504. 5, pp. https://doi.org/10.1029/2007GL031483 <https://doi.org/10.1029/2007GL031483> Glaciology Earth Sciences Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1029/2007GL031483 2023-02-04T19:27:30Z Subglacial bed conditions exert a significant control on ice stream behavior and evolution, and can be characterized by determining bed roughness from FFT analysis of radar-imaged basal reflectors. Here we assess bed roughness across Institute and Moller ice streams, West Antarctica, and compare our findings with bed roughness determined across the Siple Coast ice streams. We find that variations in bed roughness are spatially organized, and attribute this to the varying efficacy of subglacial erosion and deposition, with rougher (inland, slow-flowing) regions largely manifesting preglacial topography, and smoother (downstream, fast-flowing) regions evincing significant postglacial modification to the subglacial landscape. The observed similarities between bed roughness characteristics of IIS/MIS and the Siple ice streams suggest that IIS and MIS are largely underlain by wet, poorly consolidated sediments, and may therefore be vulnerable to the types of dynamical instabilities experienced by the Siple ice streams. Article in Journal/Newspaper Antarc* Antarctica West Antarctica Natural Environment Research Council: NERC Open Research Archive Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Coast ENVELOPE(-155.000,-155.000,-82.000,-82.000) West Antarctica Geophysical Research Letters 34 21 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology Earth Sciences |
spellingShingle |
Glaciology Earth Sciences Bingham, Robert G. Siegert, Martin J. Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
topic_facet |
Glaciology Earth Sciences |
description |
Subglacial bed conditions exert a significant control on ice stream behavior and evolution, and can be characterized by determining bed roughness from FFT analysis of radar-imaged basal reflectors. Here we assess bed roughness across Institute and Moller ice streams, West Antarctica, and compare our findings with bed roughness determined across the Siple Coast ice streams. We find that variations in bed roughness are spatially organized, and attribute this to the varying efficacy of subglacial erosion and deposition, with rougher (inland, slow-flowing) regions largely manifesting preglacial topography, and smoother (downstream, fast-flowing) regions evincing significant postglacial modification to the subglacial landscape. The observed similarities between bed roughness characteristics of IIS/MIS and the Siple ice streams suggest that IIS and MIS are largely underlain by wet, poorly consolidated sediments, and may therefore be vulnerable to the types of dynamical instabilities experienced by the Siple ice streams. |
format |
Article in Journal/Newspaper |
author |
Bingham, Robert G. Siegert, Martin J. |
author_facet |
Bingham, Robert G. Siegert, Martin J. |
author_sort |
Bingham, Robert G. |
title |
Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
title_short |
Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
title_full |
Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
title_fullStr |
Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
title_full_unstemmed |
Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams |
title_sort |
radar-derived bed roughness characterization of institute and möller ice streams, west antarctica, and comparison with siple coast ice streams |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/11682/ https://nora.nerc.ac.uk/id/eprint/11682/1/2007GL031483.pdf http://www.agu.org/journals/gl/gl0721/2007GL031483/2007GL031483.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-155.000,-155.000,-82.000,-82.000) |
geographic |
Siple Siple Coast West Antarctica |
geographic_facet |
Siple Siple Coast West Antarctica |
genre |
Antarc* Antarctica West Antarctica |
genre_facet |
Antarc* Antarctica West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11682/1/2007GL031483.pdf Bingham, Robert G.; Siegert, Martin J. 2007 Radar-derived bed roughness characterization of Institute and Möller ice streams, West Antarctica, and comparison with Siple Coast ice streams. Geophysical Research Letters, 34 (21), L21504. 5, pp. https://doi.org/10.1029/2007GL031483 <https://doi.org/10.1029/2007GL031483> |
op_doi |
https://doi.org/10.1029/2007GL031483 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
21 |
_version_ |
1766214712622579712 |