Ice-sheet bed 3-D tomography
This is the published version. Copyright 2010 International Glaciological Society Information on bed topography and basal conditions is essential to developing the next-generation ice-sheet models needed to generate a more accurate estimate of ice-sheet contribution to sea-level rise. Synthetic aper...
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/18879 2023-05-15T16:29:25+02:00 Ice-sheet bed 3-D tomography Paden, John D. Akins, Torry L. Dunson, David Allen, Christopher Thomas Gogineni, Sivaprasad 2015-11-11T17:18:36Z http://hdl.handle.net/1808/18879 https://doi.org/10.3189/002214310791190811 unknown International Glaciological Society Paden, John, Torry Akins, David Dunson, Chris Allen, and Prasad Gogineni. "Ice-sheet Bed 3-D Tomography." Journal of Glaciology 56.195 (2010): 3-11. http://dx.doi.org/10.3189/002214310791190811 http://hdl.handle.net/1808/18879 doi:10.3189/002214310791190811 openAccess Article 2015 ftunivkansas https://doi.org/10.3189/002214310791190811 2022-08-26T13:18:00Z This is the published version. Copyright 2010 International Glaciological Society Information on bed topography and basal conditions is essential to developing the next-generation ice-sheet models needed to generate a more accurate estimate of ice-sheet contribution to sea-level rise. Synthetic aperture radar (SAR) images of the ice–bed can be analyzed to obtain information on bed topography and basal conditions. We developed a wideband SAR, which was used during July 2005 to perform measurements over a series of tracks between the GISP2 and GRIP cores near Summit Camp, Greenland. The wideband SAR included an eight-element receive-antenna array with multiple-phase centers. We applied the MUltiple SIgnal Classification (MUSIC) algorithm, which estimates direction of arrival signals, to single-pass multichannel data collected as part of this experiment to obtain fine-resolution bed topography. This information is used for producing fine-resolution estimates of bed topography over a large swath of 1600m, with a 25m posting and a relative accuracy of approximately 10m. The algorithm-derived estimate of ice thickness is within 10m of the GRIP ice-core length. Data collected on two parallel tracks separated by 500m and a perpendicular track are compared and found to have difference standard deviations of 9.1 and 10.3m for the parallel and perpendicular tracks, respectively. Article in Journal/Newspaper Greenland GRIP ice core Ice Sheet Journal of Glaciology The University of Kansas: KU ScholarWorks Greenland Summit Camp ENVELOPE(-38.453,-38.453,72.579,72.579) Journal of Glaciology 56 195 3 11 |
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Open Polar |
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The University of Kansas: KU ScholarWorks |
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ftunivkansas |
language |
unknown |
description |
This is the published version. Copyright 2010 International Glaciological Society Information on bed topography and basal conditions is essential to developing the next-generation ice-sheet models needed to generate a more accurate estimate of ice-sheet contribution to sea-level rise. Synthetic aperture radar (SAR) images of the ice–bed can be analyzed to obtain information on bed topography and basal conditions. We developed a wideband SAR, which was used during July 2005 to perform measurements over a series of tracks between the GISP2 and GRIP cores near Summit Camp, Greenland. The wideband SAR included an eight-element receive-antenna array with multiple-phase centers. We applied the MUltiple SIgnal Classification (MUSIC) algorithm, which estimates direction of arrival signals, to single-pass multichannel data collected as part of this experiment to obtain fine-resolution bed topography. This information is used for producing fine-resolution estimates of bed topography over a large swath of 1600m, with a 25m posting and a relative accuracy of approximately 10m. The algorithm-derived estimate of ice thickness is within 10m of the GRIP ice-core length. Data collected on two parallel tracks separated by 500m and a perpendicular track are compared and found to have difference standard deviations of 9.1 and 10.3m for the parallel and perpendicular tracks, respectively. |
format |
Article in Journal/Newspaper |
author |
Paden, John D. Akins, Torry L. Dunson, David Allen, Christopher Thomas Gogineni, Sivaprasad |
spellingShingle |
Paden, John D. Akins, Torry L. Dunson, David Allen, Christopher Thomas Gogineni, Sivaprasad Ice-sheet bed 3-D tomography |
author_facet |
Paden, John D. Akins, Torry L. Dunson, David Allen, Christopher Thomas Gogineni, Sivaprasad |
author_sort |
Paden, John D. |
title |
Ice-sheet bed 3-D tomography |
title_short |
Ice-sheet bed 3-D tomography |
title_full |
Ice-sheet bed 3-D tomography |
title_fullStr |
Ice-sheet bed 3-D tomography |
title_full_unstemmed |
Ice-sheet bed 3-D tomography |
title_sort |
ice-sheet bed 3-d tomography |
publisher |
International Glaciological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1808/18879 https://doi.org/10.3189/002214310791190811 |
long_lat |
ENVELOPE(-38.453,-38.453,72.579,72.579) |
geographic |
Greenland Summit Camp |
geographic_facet |
Greenland Summit Camp |
genre |
Greenland GRIP ice core Ice Sheet Journal of Glaciology |
genre_facet |
Greenland GRIP ice core Ice Sheet Journal of Glaciology |
op_relation |
Paden, John, Torry Akins, David Dunson, Chris Allen, and Prasad Gogineni. "Ice-sheet Bed 3-D Tomography." Journal of Glaciology 56.195 (2010): 3-11. http://dx.doi.org/10.3189/002214310791190811 http://hdl.handle.net/1808/18879 doi:10.3189/002214310791190811 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3189/002214310791190811 |
container_title |
Journal of Glaciology |
container_volume |
56 |
container_issue |
195 |
container_start_page |
3 |
op_container_end_page |
11 |
_version_ |
1766019111572209664 |