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 () and gravity-rate-of-change () from GNSS and GRACE data, respectively. Spatia...
Published in: | Geophysical Research Letters |
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Online Access: | http://hdl.handle.net/11568/1040281 https://doi.org/10.1029/2020GL087944 |
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ftunivpisairis:oai:arpi.unipi.it:11568/1040281 2024-02-27T08:41:23+00:00 Uncertainties of Glacial Isostatic Adjustment model predictions in North America associated with 3D structure Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. 2020 http://hdl.handle.net/11568/1040281 https://doi.org/10.1029/2020GL087944 unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000560372400001 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11568/1040281 doi:10.1029/2020GL087944 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85085505588 info:eu-repo/semantics/article 2020 ftunivpisairis https://doi.org/10.1029/2020GL087944 2024-01-31T17:54:51Z 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 () and gravity-rate-of-change () 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 15-11 ka BP, which may be due to the rapid decrease of surface loading at that time. Present-day and uncertainties are largest in southwestern Hudson Bay with magnitudes 2.4 mm/yr and 0.4 Gal/yr, mainly due to the 3D viscosity structure in the lower mantle. Article in Journal/Newspaper Hudson Bay ARPI - Archivio della Ricerca dell'Università di Pisa Hudson Hudson Bay Pacific Geophysical Research Letters 47 10 |
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Open Polar |
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ARPI - Archivio della Ricerca dell'Università di Pisa |
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ftunivpisairis |
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 () and gravity-rate-of-change () 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 15-11 ka BP, which may be due to the rapid decrease of surface loading at that time. Present-day and uncertainties are largest in southwestern Hudson Bay with magnitudes 2.4 mm/yr and 0.4 Gal/yr, mainly due to the 3D viscosity structure in the lower mantle. |
author2 |
Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. |
format |
Article in Journal/Newspaper |
author |
Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. |
spellingShingle |
Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. Uncertainties of Glacial Isostatic Adjustment model predictions in North America associated with 3D structure |
author_facet |
Li, Tanghua Wu, Patrick Wang, Hansheng Steffen, Holger Khan, Nicole S. Engelhart, Simon E. Vacchi, Matteo Shaw, Timothy A. Peltier, W. Richard Horton, Benjamin P. |
author_sort |
Li, Tanghua |
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 |
publishDate |
2020 |
url |
http://hdl.handle.net/11568/1040281 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_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000560372400001 journal:GEOPHYSICAL RESEARCH LETTERS http://hdl.handle.net/11568/1040281 doi:10.1029/2020GL087944 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85085505588 |
op_doi |
https://doi.org/10.1029/2020GL087944 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
10 |
_version_ |
1792048664924913664 |