Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar
Source at https://doi.org/10.1017/jog.2018.54 . 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...
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Online Access: | https://hdl.handle.net/10037/13609 https://doi.org/10.1017/jog.2018.54 |
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ftunivtroemsoe:oai:munin.uit.no:10037/13609 2023-05-15T15:08:40+02:00 Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar Young, Tun Jan Schroeder, Dustin M. Christoffersen, Poul Lok, Lai B. Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun Lloyd 2018-07-19 https://hdl.handle.net/10037/13609 https://doi.org/10.1017/jog.2018.54 eng eng Cambridge University Press (CUP) Journal of Glaciology Young, T.J., Schroeder, P., Christoffersen, P., Lok, L.B., Nicholls, K.W., Brennan, P.V., . Hubbard, A.L. (2018). Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar. Journal of Glaciology, 64(246), 649-660. https://doi.org/10.1017/jog.2018.54 FRIDAID 1601340 doi:10.1017/jog.2018.54 0022-1430 1727-5652 https://hdl.handle.net/10037/13609 openAccess Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.1017/jog.2018.54 2021-06-25T17:56:02Z Source at https://doi.org/10.1017/jog.2018.54 . 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 Arctic glacier Greenland Journal of Glaciology University of Tromsø: Munin Open Research Archive Arctic Greenland Journal of Glaciology 64 246 649 660 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
spellingShingle |
Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 Young, Tun Jan Schroeder, Dustin M. Christoffersen, Poul Lok, Lai B. Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun Lloyd Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar |
topic_facet |
Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 VDP::Mathematics and natural science: 400::Geosciences: 450 |
description |
Source at https://doi.org/10.1017/jog.2018.54 . 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, Tun Jan Schroeder, Dustin M. Christoffersen, Poul Lok, Lai B. Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun Lloyd |
author_facet |
Young, Tun Jan Schroeder, Dustin M. Christoffersen, Poul Lok, Lai B. Nicholls, Keith W. Brennan, Paul V. Doyle, Samuel H. Hubbard, Bryn Hubbard, Alun Lloyd |
author_sort |
Young, Tun Jan |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13609 https://doi.org/10.1017/jog.2018.54 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic glacier Greenland Journal of Glaciology |
genre_facet |
Arctic glacier Greenland Journal of Glaciology |
op_relation |
Journal of Glaciology Young, T.J., Schroeder, P., Christoffersen, P., Lok, L.B., Nicholls, K.W., Brennan, P.V., . Hubbard, A.L. (2018). Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar. Journal of Glaciology, 64(246), 649-660. https://doi.org/10.1017/jog.2018.54 FRIDAID 1601340 doi:10.1017/jog.2018.54 0022-1430 1727-5652 https://hdl.handle.net/10037/13609 |
op_rights |
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 |
_version_ |
1766339983420948480 |