Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure.
We quantify GIA prediction uncertainties of 250 1D and 3D glacial isostatic adjustment (GIA) models through comparisons with deglacial relative sea‐level (RSL) data from North America and rate of vertical land motion ( urn:x-wiley:00948276:media:grl60497:grl60497-math-0001) and gravity rate of chang...
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John Wiley
2020
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:30671 2023-05-15T16:35:16+02:00 Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. Lindsay, T.C. Wu, P. Wang, H. Steffen, H. Khan, N. Engelhart, S.E. Vacchi, M. Shaw, T. Peltier, W.R. Horton, B.P. 2020-05-28 application/pdf http://dro.dur.ac.uk/30671/ http://dro.dur.ac.uk/30671/1/30671.pdf http://dro.dur.ac.uk/30671/2/30671.pdf https://doi.org/10.1029/2020GL087944 unknown John Wiley dro:30671 issn:1944-8007 doi:10.1029/2020GL087944 http://dro.dur.ac.uk/30671/ https://doi.org/10.1029/2020GL087944 http://dro.dur.ac.uk/30671/1/30671.pdf http://dro.dur.ac.uk/30671/2/30671.pdf © 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Geophysical research letters, 2020, Vol.47(10), pp.e2020GL087944 [Peer Reviewed Journal] Article PeerReviewed 2020 ftunivdurham https://doi.org/10.1029/2020GL087944 2020-06-11T22:26:17Z We quantify GIA prediction uncertainties of 250 1D and 3D glacial isostatic adjustment (GIA) models through comparisons with deglacial relative sea‐level (RSL) data from North America and rate of vertical land motion ( urn:x-wiley:00948276:media:grl60497:grl60497-math-0001) and gravity rate of change ( urn:x-wiley:00948276:media:grl60497:grl60497-math-0002) from GNSS and GRACE data, respectively. Spatially, the size of the RSL uncertainties varies across North America with the largest from Hudson Bay and near previous ice margins along the northern Atlantic and Pacific coasts, which suggests 3D viscosity structure in the lower mantle and laterally varying lithospheric thickness. Temporally, RSL uncertainties decrease from the Last Glacial Maximum to present except for west of Hudson Bay and the northeastern Pacific coast. The uncertainties of both these regions increase from 30 to 45 m between 15 and 11 ka BP, which may be due to the rapid decrease of surface loading at that time. Present‐day urn:x-wiley:00948276:media:grl60497:grl60497-math-0003 and urn:x-wiley:00948276:media:grl60497:grl60497-math-0004 uncertainties are largest in southwestern Hudson Bay with magnitudes of 2.4 mm/year and 0.4 μGal/year, mainly due to the 3D viscosity structure in the lower mantle. Article in Journal/Newspaper Hudson Bay Durham University: Durham Research Online Hudson Hudson Bay Pacific Geophysical Research Letters 47 10 |
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Open Polar |
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Durham University: Durham Research Online |
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ftunivdurham |
language |
unknown |
description |
We quantify GIA prediction uncertainties of 250 1D and 3D glacial isostatic adjustment (GIA) models through comparisons with deglacial relative sea‐level (RSL) data from North America and rate of vertical land motion ( urn:x-wiley:00948276:media:grl60497:grl60497-math-0001) and gravity rate of change ( urn:x-wiley:00948276:media:grl60497:grl60497-math-0002) from GNSS and GRACE data, respectively. Spatially, the size of the RSL uncertainties varies across North America with the largest from Hudson Bay and near previous ice margins along the northern Atlantic and Pacific coasts, which suggests 3D viscosity structure in the lower mantle and laterally varying lithospheric thickness. Temporally, RSL uncertainties decrease from the Last Glacial Maximum to present except for west of Hudson Bay and the northeastern Pacific coast. The uncertainties of both these regions increase from 30 to 45 m between 15 and 11 ka BP, which may be due to the rapid decrease of surface loading at that time. Present‐day urn:x-wiley:00948276:media:grl60497:grl60497-math-0003 and urn:x-wiley:00948276:media:grl60497:grl60497-math-0004 uncertainties are largest in southwestern Hudson Bay with magnitudes of 2.4 mm/year and 0.4 μGal/year, mainly due to the 3D viscosity structure in the lower mantle. |
format |
Article in Journal/Newspaper |
author |
Lindsay, T.C. Wu, P. Wang, H. Steffen, H. Khan, N. Engelhart, S.E. Vacchi, M. Shaw, T. Peltier, W.R. Horton, B.P. |
spellingShingle |
Lindsay, T.C. Wu, P. Wang, H. Steffen, H. Khan, N. Engelhart, S.E. Vacchi, M. Shaw, T. Peltier, W.R. Horton, B.P. Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
author_facet |
Lindsay, T.C. Wu, P. Wang, H. Steffen, H. Khan, N. Engelhart, S.E. Vacchi, M. Shaw, T. Peltier, W.R. Horton, B.P. |
author_sort |
Lindsay, T.C. |
title |
Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
title_short |
Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
title_full |
Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
title_fullStr |
Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
title_full_unstemmed |
Uncertainties of glacial isostatic adjustment model predictions in North America associated with 3D structure. |
title_sort |
uncertainties of glacial isostatic adjustment model predictions in north america associated with 3d structure. |
publisher |
John Wiley |
publishDate |
2020 |
url |
http://dro.dur.ac.uk/30671/ http://dro.dur.ac.uk/30671/1/30671.pdf http://dro.dur.ac.uk/30671/2/30671.pdf https://doi.org/10.1029/2020GL087944 |
geographic |
Hudson Hudson Bay Pacific |
geographic_facet |
Hudson Hudson Bay Pacific |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Geophysical research letters, 2020, Vol.47(10), pp.e2020GL087944 [Peer Reviewed Journal] |
op_relation |
dro:30671 issn:1944-8007 doi:10.1029/2020GL087944 http://dro.dur.ac.uk/30671/ https://doi.org/10.1029/2020GL087944 http://dro.dur.ac.uk/30671/1/30671.pdf http://dro.dur.ac.uk/30671/2/30671.pdf |
op_rights |
© 2020. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2020GL087944 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
10 |
_version_ |
1766025472166068224 |