Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance
We present preliminary geodetic estimates for vertical bedrock velocity at twelve survey GPS stations in the West Antarctic GPS Network, an additional survey station in the northern Antarctic Peninsula, and eleven continuous GPS stations distributed across the continent. The spatial pattern of these...
Published in: | Geochemistry, Geophysics, Geosystems |
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2009
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Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527 |
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_239527 2023-05-15T13:52:12+02:00 Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance Bevis, M. Kendrick, E. Smalley, R. Dalziel, I. Caccamise, D. Sasgen, I. Helsen, M. Taylor, F. Zhou, H. Brown, A. Raleigh, D. Willis, M. Wilson, T. Konfal, S. 1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum 2009 https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527 unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/2009GC002642 https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527 Geochemistry Geophysics Geosystems (G3) 550 - Earth sciences info:eu-repo/semantics/article 2009 ftgfzpotsdam https://doi.org/10.1029/2009GC002642 2022-09-14T05:55:18Z We present preliminary geodetic estimates for vertical bedrock velocity at twelve survey GPS stations in the West Antarctic GPS Network, an additional survey station in the northern Antarctic Peninsula, and eleven continuous GPS stations distributed across the continent. The spatial pattern of these velocities is not consistent with any postglacial rebound (PGR) model known to us. Four leading PGR models appear to be overpredicting uplift rates in the Transantarctic Mountains and West Antarctica and underpredicting them in the peninsula north of 65!. This discrepancy cannot be explained in terms of an elastic response to modern ice loss (except, perhaps, in part of the peninsula). Therefore, our initial geodetic results suggest that most GRACE ice mass rate estimates, which are critically dependent on a PGR correction, are systematically biased and are overpredicting ice loss for the continent as a whole. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Antarctic Peninsula West Antarctica Transantarctic Mountains Geochemistry, Geophysics, Geosystems 10 10 n/a n/a |
institution |
Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
unknown |
topic |
550 - Earth sciences |
spellingShingle |
550 - Earth sciences Bevis, M. Kendrick, E. Smalley, R. Dalziel, I. Caccamise, D. Sasgen, I. Helsen, M. Taylor, F. Zhou, H. Brown, A. Raleigh, D. Willis, M. Wilson, T. Konfal, S. Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
topic_facet |
550 - Earth sciences |
description |
We present preliminary geodetic estimates for vertical bedrock velocity at twelve survey GPS stations in the West Antarctic GPS Network, an additional survey station in the northern Antarctic Peninsula, and eleven continuous GPS stations distributed across the continent. The spatial pattern of these velocities is not consistent with any postglacial rebound (PGR) model known to us. Four leading PGR models appear to be overpredicting uplift rates in the Transantarctic Mountains and West Antarctica and underpredicting them in the peninsula north of 65!. This discrepancy cannot be explained in terms of an elastic response to modern ice loss (except, perhaps, in part of the peninsula). Therefore, our initial geodetic results suggest that most GRACE ice mass rate estimates, which are critically dependent on a PGR correction, are systematically biased and are overpredicting ice loss for the continent as a whole. |
author2 |
1.3 Earth System Modelling, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum |
format |
Article in Journal/Newspaper |
author |
Bevis, M. Kendrick, E. Smalley, R. Dalziel, I. Caccamise, D. Sasgen, I. Helsen, M. Taylor, F. Zhou, H. Brown, A. Raleigh, D. Willis, M. Wilson, T. Konfal, S. |
author_facet |
Bevis, M. Kendrick, E. Smalley, R. Dalziel, I. Caccamise, D. Sasgen, I. Helsen, M. Taylor, F. Zhou, H. Brown, A. Raleigh, D. Willis, M. Wilson, T. Konfal, S. |
author_sort |
Bevis, M. |
title |
Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
title_short |
Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
title_full |
Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
title_fullStr |
Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
title_full_unstemmed |
Geodetic measurements of vertical crustal velocity in West Antarctica and the implications for ice mass balance |
title_sort |
geodetic measurements of vertical crustal velocity in west antarctica and the implications for ice mass balance |
publishDate |
2009 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527 |
geographic |
Antarctic Antarctic Peninsula West Antarctica Transantarctic Mountains |
geographic_facet |
Antarctic Antarctic Peninsula West Antarctica Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
op_source |
Geochemistry Geophysics Geosystems (G3) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2009GC002642 https://gfzpublic.gfz-potsdam.de/pubman/item/item_239527 |
op_doi |
https://doi.org/10.1029/2009GC002642 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
10 |
container_issue |
10 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766256474798948352 |