Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar
The phase-sensitive radio-echo sounder (pRES) is a powerful new instrument that can measure the depth of internal layers and the glacier bed to millimetre accuracy. We use a stationary 16-antenna pRES array on Store Glacier in West Greenland to measure the three-dimensional orientation of dipping in...
Published in: | Journal of Glaciology |
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2018
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/resolving-the-internal-and-basal-geometry-of-ice-masses-using-imaging-phasesensitive-radar(187049d0-6bab-4971-a591-27a8ff6d0285).html https://doi.org/10.1017/jog.2018.54 |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/187049d0-6bab-4971-a591-27a8ff6d0285 2024-06-23T07:53:01+00:00 Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar Young, T.J. Schroeder, Dustin M. Christoffersen, Poul Lok, Lai Bun Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun 2018-07-19 https://research-portal.st-andrews.ac.uk/en/researchoutput/resolving-the-internal-and-basal-geometry-of-ice-masses-using-imaging-phasesensitive-radar(187049d0-6bab-4971-a591-27a8ff6d0285).html https://doi.org/10.1017/jog.2018.54 eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/resolving-the-internal-and-basal-geometry-of-ice-masses-using-imaging-phasesensitive-radar(187049d0-6bab-4971-a591-27a8ff6d0285).html info:eu-repo/semantics/openAccess Young , T J , Schroeder , D M , Christoffersen , P , Lok , L B , Nicholls , K W , Brennan , P V , Doyle , S H , Hubbard , B & Hubbard , A 2018 , ' Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar ' , Journal of Glaciology , vol. 64 , no. 246 , pp. 649-660 . https://doi.org/10.1017/jog.2018.54 article 2018 ftunstandrewcris https://doi.org/10.1017/jog.2018.54 2024-06-13T01:23:47Z The phase-sensitive radio-echo sounder (pRES) is a powerful new instrument that can measure the depth of internal layers and the glacier bed to millimetre accuracy. We use a stationary 16-antenna pRES array on Store Glacier in West Greenland to measure the three-dimensional orientation of dipping internal reflectors, extending the capabilities of pRES beyond conventional depth sounding. This novel technique portrays the effectiveness of pRES in deriving the orientation of dipping internal layers that may complement profiles obtained through other geophysical surveying methods. Deriving ice vertical strain rates from changes in layer depth as measured by a sequence of pRES observations assumes that the internal reflections come from vertically beneath the antenna. By revealing the orientation of internal reflectors and the potential deviation from nadir of their associated reflections, the use of an antenna array can correct this assumption. While the array configuration was able to resolve the geometry of englacial layers, the same configuration could not be used to accurately image the glacier bed. Here, we use simulations of the performance of different array geometries to identify configurations that can be tailored to study different types of basal geometry for future deployments. Article in Journal/Newspaper glacier Greenland Journal of Glaciology University of St Andrews: Research Portal Greenland Journal of Glaciology 64 246 649 660 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
The phase-sensitive radio-echo sounder (pRES) is a powerful new instrument that can measure the depth of internal layers and the glacier bed to millimetre accuracy. We use a stationary 16-antenna pRES array on Store Glacier in West Greenland to measure the three-dimensional orientation of dipping internal reflectors, extending the capabilities of pRES beyond conventional depth sounding. This novel technique portrays the effectiveness of pRES in deriving the orientation of dipping internal layers that may complement profiles obtained through other geophysical surveying methods. Deriving ice vertical strain rates from changes in layer depth as measured by a sequence of pRES observations assumes that the internal reflections come from vertically beneath the antenna. By revealing the orientation of internal reflectors and the potential deviation from nadir of their associated reflections, the use of an antenna array can correct this assumption. While the array configuration was able to resolve the geometry of englacial layers, the same configuration could not be used to accurately image the glacier bed. Here, we use simulations of the performance of different array geometries to identify configurations that can be tailored to study different types of basal geometry for future deployments. |
format |
Article in Journal/Newspaper |
author |
Young, T.J. Schroeder, Dustin M. Christoffersen, Poul Lok, Lai Bun Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun |
spellingShingle |
Young, T.J. Schroeder, Dustin M. Christoffersen, Poul Lok, Lai Bun Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
author_facet |
Young, T.J. Schroeder, Dustin M. Christoffersen, Poul Lok, Lai Bun Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun |
author_sort |
Young, T.J. |
title |
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
title_short |
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
title_full |
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
title_fullStr |
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
title_full_unstemmed |
Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
title_sort |
resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
publishDate |
2018 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/resolving-the-internal-and-basal-geometry-of-ice-masses-using-imaging-phasesensitive-radar(187049d0-6bab-4971-a591-27a8ff6d0285).html https://doi.org/10.1017/jog.2018.54 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Journal of Glaciology |
genre_facet |
glacier Greenland Journal of Glaciology |
op_source |
Young , T J , Schroeder , D M , Christoffersen , P , Lok , L B , Nicholls , K W , Brennan , P V , Doyle , S H , Hubbard , B & Hubbard , A 2018 , ' Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar ' , Journal of Glaciology , vol. 64 , no. 246 , pp. 649-660 . https://doi.org/10.1017/jog.2018.54 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/resolving-the-internal-and-basal-geometry-of-ice-masses-using-imaging-phasesensitive-radar(187049d0-6bab-4971-a591-27a8ff6d0285).html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/jog.2018.54 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
246 |
container_start_page |
649 |
op_container_end_page |
660 |
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