Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data
[1] Spatially coincident radar and seismic data collected two weeks apart on Rutford Ice Stream were analyzed to investigate the mechanical and hydrological characteristics of the ice-bed interface. Seismic data allow the differentiation of bed deformation from basal sliding. In radar data, sliding...
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American Geophysical Union
2008
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Online Access: | http://nora.nerc.ac.uk/id/eprint/11571/ https://nora.nerc.ac.uk/id/eprint/11571/1/2008GL033681.pdf http://www.agu.org/journals/gl/gl0812/2008GL033681/2008GL033681.pdf |
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ftnerc:oai:nora.nerc.ac.uk:11571 2023-05-15T13:45:10+02:00 Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data Murray, T. Corr, Hugh Forieri, A. Smith, Andy 2008 text http://nora.nerc.ac.uk/id/eprint/11571/ https://nora.nerc.ac.uk/id/eprint/11571/1/2008GL033681.pdf http://www.agu.org/journals/gl/gl0812/2008GL033681/2008GL033681.pdf en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/11571/1/2008GL033681.pdf Murray, T.; Corr, Hugh; Forieri, A.; Smith, Andy orcid:0000-0001-8577-482X . 2008 Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data. Geophysical Research Letters, 35 (12), L12504. 5, pp. https://doi.org/10.1029/2008GL033681 <https://doi.org/10.1029/2008GL033681> Glaciology Hydrology Earth Sciences Publication - Article PeerReviewed 2008 ftnerc https://doi.org/10.1029/2008GL033681 2023-02-04T19:27:25Z [1] Spatially coincident radar and seismic data collected two weeks apart on Rutford Ice Stream were analyzed to investigate the mechanical and hydrological characteristics of the ice-bed interface. Seismic data allow the differentiation of bed deformation from basal sliding. In radar data, sliding regions are characterised by highly variable permittivity values. We suggest these regions are characterized by small water bodies, possibly a cavity system. In contrast, deforming regions are characterised by consistent, low permittivity, which suggests intimate ice-sediment contact without a distinct interface. However, in deforming regions we identified three bright radar features similar to 50 m wide, consistent in lateral location over distances of 5-10 km up and downstream, and comprised of water less than similar to 0.2 m deep. We interpret these as part of a water evacuation system, most likely canals. Our results emphasise the great potential of radar and seismic techniques in combination to infer basal conditions beneath ice streams. Article in Journal/Newspaper Antarc* Antarctica Rutford Ice Stream West Antarctica Natural Environment Research Council: NERC Open Research Archive Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) West Antarctica Geophysical Research Letters 35 12 n/a n/a |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology Hydrology Earth Sciences |
spellingShingle |
Glaciology Hydrology Earth Sciences Murray, T. Corr, Hugh Forieri, A. Smith, Andy Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
topic_facet |
Glaciology Hydrology Earth Sciences |
description |
[1] Spatially coincident radar and seismic data collected two weeks apart on Rutford Ice Stream were analyzed to investigate the mechanical and hydrological characteristics of the ice-bed interface. Seismic data allow the differentiation of bed deformation from basal sliding. In radar data, sliding regions are characterised by highly variable permittivity values. We suggest these regions are characterized by small water bodies, possibly a cavity system. In contrast, deforming regions are characterised by consistent, low permittivity, which suggests intimate ice-sediment contact without a distinct interface. However, in deforming regions we identified three bright radar features similar to 50 m wide, consistent in lateral location over distances of 5-10 km up and downstream, and comprised of water less than similar to 0.2 m deep. We interpret these as part of a water evacuation system, most likely canals. Our results emphasise the great potential of radar and seismic techniques in combination to infer basal conditions beneath ice streams. |
format |
Article in Journal/Newspaper |
author |
Murray, T. Corr, Hugh Forieri, A. Smith, Andy |
author_facet |
Murray, T. Corr, Hugh Forieri, A. Smith, Andy |
author_sort |
Murray, T. |
title |
Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
title_short |
Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
title_full |
Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
title_fullStr |
Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
title_full_unstemmed |
Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data |
title_sort |
contrasts in hydrology between regions of basal deformation and sliding beneath rutford ice stream, west antarctica, mapped using radar and seismic data |
publisher |
American Geophysical Union |
publishDate |
2008 |
url |
http://nora.nerc.ac.uk/id/eprint/11571/ https://nora.nerc.ac.uk/id/eprint/11571/1/2008GL033681.pdf http://www.agu.org/journals/gl/gl0812/2008GL033681/2008GL033681.pdf |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Rutford Rutford Ice Stream West Antarctica |
geographic_facet |
Rutford Rutford Ice Stream West Antarctica |
genre |
Antarc* Antarctica Rutford Ice Stream West Antarctica |
genre_facet |
Antarc* Antarctica Rutford Ice Stream West Antarctica |
op_relation |
https://nora.nerc.ac.uk/id/eprint/11571/1/2008GL033681.pdf Murray, T.; Corr, Hugh; Forieri, A.; Smith, Andy orcid:0000-0001-8577-482X . 2008 Contrasts in hydrology between regions of basal deformation and sliding beneath Rutford Ice Stream, West Antarctica, mapped using radar and seismic data. Geophysical Research Letters, 35 (12), L12504. 5, pp. https://doi.org/10.1029/2008GL033681 <https://doi.org/10.1029/2008GL033681> |
op_doi |
https://doi.org/10.1029/2008GL033681 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
12 |
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n/a |
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_version_ |
1766214644562657280 |