Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry
We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat-2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers, and is tested on the Siple Coast region of West Antarctica. The mapped ground...
Published in: | Geophysical Research Letters |
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Online Access: | https://hdl.handle.net/1983/78750773-9a82-4f38-a87d-2fa2446802cb https://research-information.bris.ac.uk/en/publications/78750773-9a82-4f38-a87d-2fa2446802cb https://doi.org/10.1002/2017GL075589 https://research-information.bris.ac.uk/ws/files/139975887/Dawson_et_al_2017_Geophysical_Research_Letters.pdf |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/78750773-9a82-4f38-a87d-2fa2446802cb 2024-05-12T07:54:46+00:00 Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry Dawson, Geoffrey Bamber, Jonathan 2017-12-11 application/pdf https://hdl.handle.net/1983/78750773-9a82-4f38-a87d-2fa2446802cb https://research-information.bris.ac.uk/en/publications/78750773-9a82-4f38-a87d-2fa2446802cb https://doi.org/10.1002/2017GL075589 https://research-information.bris.ac.uk/ws/files/139975887/Dawson_et_al_2017_Geophysical_Research_Letters.pdf eng eng https://research-information.bris.ac.uk/en/publications/78750773-9a82-4f38-a87d-2fa2446802cb info:eu-repo/semantics/openAccess Dawson , G & Bamber , J 2017 , ' Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry ' , Geophysical Research Letters . https://doi.org/10.1002/2017GL075589 grounding line CryoSat-2 article 2017 ftubristolcris https://doi.org/10.1002/2017GL075589 2024-04-17T14:26:36Z We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat-2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers, and is tested on the Siple Coast region of West Antarctica. The mapped grounding line is in good agreement with previous observations from differential SAR interferometry (DInSAR) and from ICEsat repeat tracks, with a standard deviation of 1.1 km and 1.0 km, respectively between these methods and ours. There is, however an average seaward bias of 0.6 km, which is due to the poorer precision of CryoSat-2. We have improved coverage particularly near the Echelmeyer Ice Stream where we have shown the grounding zone is approximately 25 km inland from previous estimates. This new method is computationally efficient and can be applied to the rest of Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Echelmeyer Ice Stream Ice Shelves West Antarctica University of Bristol: Bristol Research Antarctic Echelmeyer Ice Stream ENVELOPE(-150.000,-150.000,-79.167,-79.167) Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Coast ENVELOPE(-155.000,-155.000,-82.000,-82.000) West Antarctica Geophysical Research Letters 44 23 11,886 11,893 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
grounding line CryoSat-2 |
spellingShingle |
grounding line CryoSat-2 Dawson, Geoffrey Bamber, Jonathan Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
topic_facet |
grounding line CryoSat-2 |
description |
We present a new technique for mapping the grounding line of Antarctic ice shelves using a combination of CryoSat-2 standard and swath elevation data. Our method is based on detecting the tidal signal in pseudo crossovers, and is tested on the Siple Coast region of West Antarctica. The mapped grounding line is in good agreement with previous observations from differential SAR interferometry (DInSAR) and from ICEsat repeat tracks, with a standard deviation of 1.1 km and 1.0 km, respectively between these methods and ours. There is, however an average seaward bias of 0.6 km, which is due to the poorer precision of CryoSat-2. We have improved coverage particularly near the Echelmeyer Ice Stream where we have shown the grounding zone is approximately 25 km inland from previous estimates. This new method is computationally efficient and can be applied to the rest of Antarctica. |
format |
Article in Journal/Newspaper |
author |
Dawson, Geoffrey Bamber, Jonathan |
author_facet |
Dawson, Geoffrey Bamber, Jonathan |
author_sort |
Dawson, Geoffrey |
title |
Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
title_short |
Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
title_full |
Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
title_fullStr |
Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
title_full_unstemmed |
Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry |
title_sort |
antarctic grounding line mapping from cryosat-2 radar altimetry |
publishDate |
2017 |
url |
https://hdl.handle.net/1983/78750773-9a82-4f38-a87d-2fa2446802cb https://research-information.bris.ac.uk/en/publications/78750773-9a82-4f38-a87d-2fa2446802cb https://doi.org/10.1002/2017GL075589 https://research-information.bris.ac.uk/ws/files/139975887/Dawson_et_al_2017_Geophysical_Research_Letters.pdf |
long_lat |
ENVELOPE(-150.000,-150.000,-79.167,-79.167) ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-155.000,-155.000,-82.000,-82.000) |
geographic |
Antarctic Echelmeyer Ice Stream Siple Siple Coast West Antarctica |
geographic_facet |
Antarctic Echelmeyer Ice Stream Siple Siple Coast West Antarctica |
genre |
Antarc* Antarctic Antarctica Echelmeyer Ice Stream Ice Shelves West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Echelmeyer Ice Stream Ice Shelves West Antarctica |
op_source |
Dawson , G & Bamber , J 2017 , ' Antarctic Grounding Line Mapping From CryoSat-2 Radar Altimetry ' , Geophysical Research Letters . https://doi.org/10.1002/2017GL075589 |
op_relation |
https://research-information.bris.ac.uk/en/publications/78750773-9a82-4f38-a87d-2fa2446802cb |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2017GL075589 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
23 |
container_start_page |
11,886 |
op_container_end_page |
11,893 |
_version_ |
1798852090703904768 |