Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion
peer reviewed We compared estimates of crustal velocities within Great Britain based on continuous global positioning system (CGPS) measurements to predictions from a model of glacial isostatic adjustment (GIA). The observed and predicted values for vertical motion are highly correlated indicating t...
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Blackwell Publishing
2009
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Online Access: | https://orbilu.uni.lu/handle/10993/4454 https://orbilu.uni.lu/bitstream/10993/4454/1/GJI2009_178_1_14-22.pdf https://doi.org/10.1111/j.1365-246X.2008.04033.x |
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ftunivluxembourg:oai:orbilu.uni.lu:10993/4454 2024-04-21T08:05:05+00:00 Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion Bradley, S. L. Milne, G. A. Teferle, Felix Norman Bingley, R. M. Orliac, E. J. 2009 https://orbilu.uni.lu/handle/10993/4454 https://orbilu.uni.lu/bitstream/10993/4454/1/GJI2009_178_1_14-22.pdf https://doi.org/10.1111/j.1365-246X.2008.04033.x en eng Blackwell Publishing http://dx.doi.org/10.1111/j.1365-246X.2008.04033.x urn:issn:0956-540X https://orbilu.uni.lu/handle/10993/4454 info:hdl:10993/4454 https://orbilu.uni.lu/bitstream/10993/4454/1/GJI2009_178_1_14-22.pdf doi:10.1111/j.1365-246X.2008.04033.x scopus-id:2-s2.0-67650155963 wos:000266979600002 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Geophysical Journal International, 178 (178), 14-22 (2009) satellite geodesy plate motions dynamics of lithosphere and mantle Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2009 ftunivluxembourg https://doi.org/10.1111/j.1365-246X.2008.04033.x 2024-03-27T14:10:10Z peer reviewed We compared estimates of crustal velocities within Great Britain based on continuous global positioning system (CGPS) measurements to predictions from a model of glacial isostatic adjustment (GIA). The observed and predicted values for vertical motion are highly correlated indicating that GIA is the dominant geodynamic process contributing to this field. In contrast, motion of the Eurasian plate dominates the horizontal motion component. A model of plate motion was adopted to remove this signal in order to estimate intraplate horizontal motion associated with GIA. However, a coherent pattern of horizontal motion was not evident in the resulting velocity field. We adopted a recently published model of the British–Irish ice sheet to predict vertical crustal motion for a large number of spherically symmetric Earth viscosity models. Our results show that the adopted ice model is capable of producing a high-quality fit to the observations. The CGPS-derived estimates of vertical motion provide a useful constraint on the average value of viscosity within the upper mantle. Values of model lithospheric thickness and lower mantle viscosity are less well resolved, however. A suite of predictions based on an alternative ice model indicates that the vertical motion data are relatively insensitive to uncertainties in the ice loading history and so the constraints on upper mantle viscosity are robust. Article in Journal/Newspaper Ice Sheet University of Luxembourg: ORBilu - Open Repository and Bibliography Geophysical Journal International 178 1 14 22 |
institution |
Open Polar |
collection |
University of Luxembourg: ORBilu - Open Repository and Bibliography |
op_collection_id |
ftunivluxembourg |
language |
English |
topic |
satellite geodesy plate motions dynamics of lithosphere and mantle Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
satellite geodesy plate motions dynamics of lithosphere and mantle Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Bradley, S. L. Milne, G. A. Teferle, Felix Norman Bingley, R. M. Orliac, E. J. Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
topic_facet |
satellite geodesy plate motions dynamics of lithosphere and mantle Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed We compared estimates of crustal velocities within Great Britain based on continuous global positioning system (CGPS) measurements to predictions from a model of glacial isostatic adjustment (GIA). The observed and predicted values for vertical motion are highly correlated indicating that GIA is the dominant geodynamic process contributing to this field. In contrast, motion of the Eurasian plate dominates the horizontal motion component. A model of plate motion was adopted to remove this signal in order to estimate intraplate horizontal motion associated with GIA. However, a coherent pattern of horizontal motion was not evident in the resulting velocity field. We adopted a recently published model of the British–Irish ice sheet to predict vertical crustal motion for a large number of spherically symmetric Earth viscosity models. Our results show that the adopted ice model is capable of producing a high-quality fit to the observations. The CGPS-derived estimates of vertical motion provide a useful constraint on the average value of viscosity within the upper mantle. Values of model lithospheric thickness and lower mantle viscosity are less well resolved, however. A suite of predictions based on an alternative ice model indicates that the vertical motion data are relatively insensitive to uncertainties in the ice loading history and so the constraints on upper mantle viscosity are robust. |
format |
Article in Journal/Newspaper |
author |
Bradley, S. L. Milne, G. A. Teferle, Felix Norman Bingley, R. M. Orliac, E. J. |
author_facet |
Bradley, S. L. Milne, G. A. Teferle, Felix Norman Bingley, R. M. Orliac, E. J. |
author_sort |
Bradley, S. L. |
title |
Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
title_short |
Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
title_full |
Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
title_fullStr |
Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
title_full_unstemmed |
Glacial Isostatic Adjustment of the British Isles: New constraints form GPS measurements of crustal motion |
title_sort |
glacial isostatic adjustment of the british isles: new constraints form gps measurements of crustal motion |
publisher |
Blackwell Publishing |
publishDate |
2009 |
url |
https://orbilu.uni.lu/handle/10993/4454 https://orbilu.uni.lu/bitstream/10993/4454/1/GJI2009_178_1_14-22.pdf https://doi.org/10.1111/j.1365-246X.2008.04033.x |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geophysical Journal International, 178 (178), 14-22 (2009) |
op_relation |
http://dx.doi.org/10.1111/j.1365-246X.2008.04033.x urn:issn:0956-540X https://orbilu.uni.lu/handle/10993/4454 info:hdl:10993/4454 https://orbilu.uni.lu/bitstream/10993/4454/1/GJI2009_178_1_14-22.pdf doi:10.1111/j.1365-246X.2008.04033.x scopus-id:2-s2.0-67650155963 wos:000266979600002 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2008.04033.x |
container_title |
Geophysical Journal International |
container_volume |
178 |
container_issue |
1 |
container_start_page |
14 |
op_container_end_page |
22 |
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1796944627487473664 |