Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations
Bedrock uplift in Antarctica is dominated by acombination of glacial isostatic adjustment (GIA) andelastic response to contemporary mass change. Here, wepresent spatially extensive GPS observations of Antarcticbedrock uplift, using 52% more stations than previousstudies, giving enhanced coverage, an...
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Online Access: | https://doi.org/10.1029/2011GL049277 http://ecite.utas.edu.au/89658 |
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ftunivtasecite:oai:ecite.utas.edu.au:89658 2023-05-15T13:37:23+02:00 Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations Thomas, ID King, MA Bentley, MJ Whitehouse, PL Penna, NT Williams, SDP Riva, REM Lavallee, DA Clarke, PJ King, EC Hindmarsh, RCA Koivula, H 2011 https://doi.org/10.1029/2011GL049277 http://ecite.utas.edu.au/89658 en eng Amer Geophysical Union http://dx.doi.org/10.1029/2011GL049277 Thomas, ID and King, MA and Bentley, MJ and Whitehouse, PL and Penna, NT and Williams, SDP and Riva, REM and Lavallee, DA and Clarke, PJ and King, EC and Hindmarsh, RCA and Koivula, H, Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations, Geophysical Research Letters, 38, (22) Article L22302. ISSN 0094-8276 (2011) [Refereed Article] http://ecite.utas.edu.au/89658 Engineering Geomatic Engineering Geodesy Refereed Article PeerReviewed 2011 ftunivtasecite https://doi.org/10.1029/2011GL049277 2019-12-13T21:53:10Z Bedrock uplift in Antarctica is dominated by acombination of glacial isostatic adjustment (GIA) andelastic response to contemporary mass change. Here, wepresent spatially extensive GPS observations of Antarcticbedrock uplift, using 52% more stations than previousstudies, giving enhanced coverage, and with improvedprecision. We observe rapid elastic uplift in the northernAntarctic Peninsula. After considering elastic rebound, theGPS data suggests that modeled or empirical GIA upliftsignals are often over‐estimated, particularly themagnitudes of the signal maxima. Our observation that GIAuplift is misrepresented by modeling (weighted root‐mean-squaresof observation‐model differences: 4.95.0 mm/yr)suggests that, apart from a few regions where large icemass loss is occurring, the spatial pattern of secular icemass change derived from Gravity Recovery and ClimateExperiment (GRACE) data and GIA models may beunreliable, and that several recent secular Antarctic icemass loss estimates are systematically biased, mainly toohigh. Article in Journal/Newspaper Antarc* Antarctic Antarctica eCite UTAS (University of Tasmania) Antarctic Geophysical Research Letters 38 22 n/a n/a |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Engineering Geomatic Engineering Geodesy |
spellingShingle |
Engineering Geomatic Engineering Geodesy Thomas, ID King, MA Bentley, MJ Whitehouse, PL Penna, NT Williams, SDP Riva, REM Lavallee, DA Clarke, PJ King, EC Hindmarsh, RCA Koivula, H Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
topic_facet |
Engineering Geomatic Engineering Geodesy |
description |
Bedrock uplift in Antarctica is dominated by acombination of glacial isostatic adjustment (GIA) andelastic response to contemporary mass change. Here, wepresent spatially extensive GPS observations of Antarcticbedrock uplift, using 52% more stations than previousstudies, giving enhanced coverage, and with improvedprecision. We observe rapid elastic uplift in the northernAntarctic Peninsula. After considering elastic rebound, theGPS data suggests that modeled or empirical GIA upliftsignals are often over‐estimated, particularly themagnitudes of the signal maxima. Our observation that GIAuplift is misrepresented by modeling (weighted root‐mean-squaresof observation‐model differences: 4.95.0 mm/yr)suggests that, apart from a few regions where large icemass loss is occurring, the spatial pattern of secular icemass change derived from Gravity Recovery and ClimateExperiment (GRACE) data and GIA models may beunreliable, and that several recent secular Antarctic icemass loss estimates are systematically biased, mainly toohigh. |
format |
Article in Journal/Newspaper |
author |
Thomas, ID King, MA Bentley, MJ Whitehouse, PL Penna, NT Williams, SDP Riva, REM Lavallee, DA Clarke, PJ King, EC Hindmarsh, RCA Koivula, H |
author_facet |
Thomas, ID King, MA Bentley, MJ Whitehouse, PL Penna, NT Williams, SDP Riva, REM Lavallee, DA Clarke, PJ King, EC Hindmarsh, RCA Koivula, H |
author_sort |
Thomas, ID |
title |
Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
title_short |
Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
title_full |
Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
title_fullStr |
Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
title_full_unstemmed |
Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations |
title_sort |
widespread low rates of antarctic glacial isostatic adjustment revealed by gps observations |
publisher |
Amer Geophysical Union |
publishDate |
2011 |
url |
https://doi.org/10.1029/2011GL049277 http://ecite.utas.edu.au/89658 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://dx.doi.org/10.1029/2011GL049277 Thomas, ID and King, MA and Bentley, MJ and Whitehouse, PL and Penna, NT and Williams, SDP and Riva, REM and Lavallee, DA and Clarke, PJ and King, EC and Hindmarsh, RCA and Koivula, H, Widespread low rates of Antarctic glacial isostatic adjustment revealed by GPS observations, Geophysical Research Letters, 38, (22) Article L22302. ISSN 0094-8276 (2011) [Refereed Article] http://ecite.utas.edu.au/89658 |
op_doi |
https://doi.org/10.1029/2011GL049277 |
container_title |
Geophysical Research Letters |
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38 |
container_issue |
22 |
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n/a |
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n/a |
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1766091144587902976 |