GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia
The free-air gravity trend over Canada, derived from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, robustly isolates the gravity signal associated with glacial isostatic adjustment (GIA) from the longer–time scale mantle convection process. This trend proves that the ancient...
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ftnerc:oai:nora.nerc.ac.uk:19432 2023-05-15T16:35:23+02:00 GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia Tamisiea, M.E. Mitrovica, J.X. Davis, J.L. 2007-05-11 http://nora.nerc.ac.uk/id/eprint/19432/ https://doi.org/10.1126/science.1137157 unknown Tamisiea, M.E.; Mitrovica, J.X.; Davis, J.L. 2007 GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia. Science, 316 (5826). 881-883. https://doi.org/10.1126/science.1137157 <https://doi.org/10.1126/science.1137157> Marine Sciences Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1126/science.1137157 2023-02-04T19:32:17Z The free-air gravity trend over Canada, derived from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, robustly isolates the gravity signal associated with glacial isostatic adjustment (GIA) from the longer–time scale mantle convection process. This trend proves that the ancient Laurentian ice complex was composed of two large domes to the west and east of Hudson Bay, in accord with one of two classes of earlier reconstructions. Moreover, GIA models that reconcile the peak rates contribute ∼25 to ∼45% to the observed static gravity field, which represents an important boundary condition on the buoyancy of the continental tectosphere. Article in Journal/Newspaper Hudson Bay Natural Environment Research Council: NERC Open Research Archive Hudson Bay Canada Hudson Science 316 5826 881 883 |
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Natural Environment Research Council: NERC Open Research Archive |
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unknown |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Tamisiea, M.E. Mitrovica, J.X. Davis, J.L. GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
topic_facet |
Marine Sciences |
description |
The free-air gravity trend over Canada, derived from the Gravity Recovery and Climate Experiment (GRACE) satellite mission, robustly isolates the gravity signal associated with glacial isostatic adjustment (GIA) from the longer–time scale mantle convection process. This trend proves that the ancient Laurentian ice complex was composed of two large domes to the west and east of Hudson Bay, in accord with one of two classes of earlier reconstructions. Moreover, GIA models that reconcile the peak rates contribute ∼25 to ∼45% to the observed static gravity field, which represents an important boundary condition on the buoyancy of the continental tectosphere. |
format |
Article in Journal/Newspaper |
author |
Tamisiea, M.E. Mitrovica, J.X. Davis, J.L. |
author_facet |
Tamisiea, M.E. Mitrovica, J.X. Davis, J.L. |
author_sort |
Tamisiea, M.E. |
title |
GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
title_short |
GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
title_full |
GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
title_fullStr |
GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
title_full_unstemmed |
GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
title_sort |
grace gravity data constrain ancient ice geometries and continental dynamics over laurentia |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/19432/ https://doi.org/10.1126/science.1137157 |
geographic |
Hudson Bay Canada Hudson |
geographic_facet |
Hudson Bay Canada Hudson |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_relation |
Tamisiea, M.E.; Mitrovica, J.X.; Davis, J.L. 2007 GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia. Science, 316 (5826). 881-883. https://doi.org/10.1126/science.1137157 <https://doi.org/10.1126/science.1137157> |
op_doi |
https://doi.org/10.1126/science.1137157 |
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Science |
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316 |
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5826 |
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881 |
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883 |
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1766025603955294208 |