Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations.
Geodetic measurements of Antarctic solid Earth deformation include signals from plate rotation and glacial isostatic adjustment (GIA). Through simulation, we investigate the degree to which these signals are separable within horizontal GPS site velocities that commonly define plate rotation estimate...
Published in: | Geophysical Journal International |
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Oxford University Press
2016
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Online Access: | http://dro.dur.ac.uk/17515/ http://dro.dur.ac.uk/17515/1/17515.pdf https://doi.org/10.1093/gji/ggv461 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:17515 2023-05-15T14:02:14+02:00 Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. King, M.A. Whitehouse, P.L. van der Wal, W. 2016-01-01 application/pdf http://dro.dur.ac.uk/17515/ http://dro.dur.ac.uk/17515/1/17515.pdf https://doi.org/10.1093/gji/ggv461 unknown Oxford University Press dro:17515 issn:0956-540X issn: 1365-246X doi:10.1093/gji/ggv461 http://dro.dur.ac.uk/17515/ http://dx.doi.org/10.1093/gji/ggv461 http://dro.dur.ac.uk/17515/1/17515.pdf © The Authors 2015. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY Geophysical journal international, 2016, Vol.204(1), pp.324-330 [Peer Reviewed Journal] Space geodetic surveys Plate motions Tectonics and climatic interactions Antarctica Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1093/gji/ggv461 2020-05-28T22:34:03Z Geodetic measurements of Antarctic solid Earth deformation include signals from plate rotation and glacial isostatic adjustment (GIA). Through simulation, we investigate the degree to which these signals are separable within horizontal GPS site velocities that commonly define plate rotation estimates and that promise new constraints on models of GIA. Using a suite of GIA model predictions that incorporate both 1-D and 3-D Earth rheologies, we show that, given the present location of GPS sites within East Antarctica, unmodelled or mismodelled GIA signal within GPS velocities produces biased estimates of plate rotation. When biased plate rotation is removed from the GPS velocities, errors as large as 0.8 mm yr−1 are introduced; a value commonly larger than the predicted GIA signal magnitude. In the absence of reliable forward models of plate rotation or GIA then Antarctic geodetic velocities cannot totally and unambiguously constrain either process, especially GIA. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Durham University: Durham Research Online Antarctic East Antarctica Geophysical Journal International 204 1 324 330 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
topic |
Space geodetic surveys Plate motions Tectonics and climatic interactions Antarctica |
spellingShingle |
Space geodetic surveys Plate motions Tectonics and climatic interactions Antarctica King, M.A. Whitehouse, P.L. van der Wal, W. Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
topic_facet |
Space geodetic surveys Plate motions Tectonics and climatic interactions Antarctica |
description |
Geodetic measurements of Antarctic solid Earth deformation include signals from plate rotation and glacial isostatic adjustment (GIA). Through simulation, we investigate the degree to which these signals are separable within horizontal GPS site velocities that commonly define plate rotation estimates and that promise new constraints on models of GIA. Using a suite of GIA model predictions that incorporate both 1-D and 3-D Earth rheologies, we show that, given the present location of GPS sites within East Antarctica, unmodelled or mismodelled GIA signal within GPS velocities produces biased estimates of plate rotation. When biased plate rotation is removed from the GPS velocities, errors as large as 0.8 mm yr−1 are introduced; a value commonly larger than the predicted GIA signal magnitude. In the absence of reliable forward models of plate rotation or GIA then Antarctic geodetic velocities cannot totally and unambiguously constrain either process, especially GIA. |
format |
Article in Journal/Newspaper |
author |
King, M.A. Whitehouse, P.L. van der Wal, W. |
author_facet |
King, M.A. Whitehouse, P.L. van der Wal, W. |
author_sort |
King, M.A. |
title |
Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
title_short |
Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
title_full |
Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
title_fullStr |
Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
title_full_unstemmed |
Incomplete separability of Antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
title_sort |
incomplete separability of antarctic plate rotation from glacial isostatic adjustment deformation within geodetic observations. |
publisher |
Oxford University Press |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/17515/ http://dro.dur.ac.uk/17515/1/17515.pdf https://doi.org/10.1093/gji/ggv461 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Geophysical journal international, 2016, Vol.204(1), pp.324-330 [Peer Reviewed Journal] |
op_relation |
dro:17515 issn:0956-540X issn: 1365-246X doi:10.1093/gji/ggv461 http://dro.dur.ac.uk/17515/ http://dx.doi.org/10.1093/gji/ggv461 http://dro.dur.ac.uk/17515/1/17515.pdf |
op_rights |
© The Authors 2015. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1093/gji/ggv461 |
container_title |
Geophysical Journal International |
container_volume |
204 |
container_issue |
1 |
container_start_page |
324 |
op_container_end_page |
330 |
_version_ |
1766272396237471744 |