Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar
ABSTRACT 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 d...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2018
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2018.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000540 |
id |
crcambridgeupr:10.1017/jog.2018.54 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2018.54 2024-09-15T18:07:44+00:00 Resolving the internal and basal geometry of ice masses using imaging phase-sensitive radar YOUNG, TUN JAN SCHROEDER, DUSTIN M. CHRISTOFFERSEN, POUL LOK, LAI BUN NICHOLLS, KEITH W. BRENNAN, PAUL V. DOYLE, SAMUEL H. HUBBARD, BRYN HUBBARD, ALUN 2018 http://dx.doi.org/10.1017/jog.2018.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000540 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 64, issue 246, page 649-660 ISSN 0022-1430 1727-5652 journal-article 2018 crcambridgeupr https://doi.org/10.1017/jog.2018.54 2024-07-10T04:04:44Z ABSTRACT 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 Cambridge University Press Journal of Glaciology 64 246 649 660 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT 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 BUN NICHOLLS, KEITH W. BRENNAN, PAUL V. DOYLE, SAMUEL H. HUBBARD, BRYN HUBBARD, ALUN |
spellingShingle |
YOUNG, TUN JAN 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, TUN JAN SCHROEDER, DUSTIN M. CHRISTOFFERSEN, POUL LOK, LAI BUN NICHOLLS, KEITH W. BRENNAN, PAUL V. DOYLE, SAMUEL H. HUBBARD, BRYN HUBBARD, ALUN |
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 |
http://dx.doi.org/10.1017/jog.2018.54 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143018000540 |
genre |
glacier Greenland Journal of Glaciology |
genre_facet |
glacier Greenland Journal of Glaciology |
op_source |
Journal of Glaciology volume 64, issue 246, page 649-660 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
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_ |
1810445107507232768 |