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...
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Cambridge University Press
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ftdoajarticles:oai:doaj.org/article:93a928ce73444272a16d0eecfdbaf8de 2023-05-15T15:07:12+02:00 Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar TUN JAN YOUNG DUSTIN M. SCHROEDER POUL CHRISTOFFERSEN LAI BUN LOK KEITH W. NICHOLLS PAUL V. BRENNAN SAMUEL H. DOYLE BRYN HUBBARD ALUN HUBBARD 2018-08-01T00:00:00Z https://doi.org/10.1017/jog.2018.54 https://doaj.org/article/93a928ce73444272a16d0eecfdbaf8de EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143018000540/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.54 0022-1430 1727-5652 https://doaj.org/article/93a928ce73444272a16d0eecfdbaf8de Journal of Glaciology, Vol 64, Pp 649-660 (2018) Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/jog.2018.54 2023-03-12T01:30:59Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Greenland Journal of Glaciology 64 246 649 660 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology glaciological instruments and methods ground-penetrating radar radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 TUN JAN YOUNG DUSTIN M. SCHROEDER POUL CHRISTOFFERSEN LAI BUN LOK KEITH W. NICHOLLS PAUL V. BRENNAN SAMUEL H. DOYLE BRYN HUBBARD ALUN HUBBARD 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 Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
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 |
TUN JAN YOUNG DUSTIN M. SCHROEDER POUL CHRISTOFFERSEN LAI BUN LOK KEITH W. NICHOLLS PAUL V. BRENNAN SAMUEL H. DOYLE BRYN HUBBARD ALUN HUBBARD |
author_facet |
TUN JAN YOUNG DUSTIN M. SCHROEDER POUL CHRISTOFFERSEN LAI BUN LOK KEITH W. NICHOLLS PAUL V. BRENNAN SAMUEL H. DOYLE BRYN HUBBARD ALUN HUBBARD |
author_sort |
TUN JAN YOUNG |
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 |
publishDate |
2018 |
url |
https://doi.org/10.1017/jog.2018.54 https://doaj.org/article/93a928ce73444272a16d0eecfdbaf8de |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic glacier Greenland Journal of Glaciology |
genre_facet |
Arctic glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 64, Pp 649-660 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143018000540/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.54 0022-1430 1727-5652 https://doaj.org/article/93a928ce73444272a16d0eecfdbaf8de |
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_ |
1766338758281527296 |