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 ancien...
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American Association for the Advancement of Science
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ftharvardudash:oai:dash.harvard.edu:1/41401433 2023-05-15T16:35:24+02:00 GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia Tamisiea, M. E. Mitrovica, Jerry Davis, J. L. 2007 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401433 https://doi.org/10.1126/science.1137157 en_US eng American Association for the Advancement of Science Science Tamisiea, M. E., J. X. Mitrovica, and J. L. Davis. 2007. “GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia.” Science 316 (5826): 881–83. https://doi.org/10.1126/science.1137157. 0036-8075 1095-9203 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401433 doi:10.1126/science.1137157 Journal Article 2007 ftharvardudash https://doi.org/10.1126/science.1137157 2022-04-05T18:55:09Z 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 similar to 25 to similar to 45% to the observed static gravity field, which represents an important boundary condition on the buoyancy of the continental tectosphere. Version of Record Article in Journal/Newspaper Hudson Bay Harvard University: DASH - Digital Access to Scholarship at Harvard Canada Hudson Hudson Bay Science 316 5826 881 883 |
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Harvard University: DASH - Digital Access to Scholarship at Harvard |
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English |
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 similar to 25 to similar to 45% to the observed static gravity field, which represents an important boundary condition on the buoyancy of the continental tectosphere. Version of Record |
format |
Article in Journal/Newspaper |
author |
Tamisiea, M. E. Mitrovica, Jerry Davis, J. L. |
spellingShingle |
Tamisiea, M. E. Mitrovica, Jerry Davis, J. L. GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia |
author_facet |
Tamisiea, M. E. Mitrovica, Jerry 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 |
publisher |
American Association for the Advancement of Science |
publishDate |
2007 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401433 https://doi.org/10.1126/science.1137157 |
geographic |
Canada Hudson Hudson Bay |
geographic_facet |
Canada Hudson Hudson Bay |
genre |
Hudson Bay |
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Hudson Bay |
op_relation |
Science Tamisiea, M. E., J. X. Mitrovica, and J. L. Davis. 2007. “GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia.” Science 316 (5826): 881–83. https://doi.org/10.1126/science.1137157. 0036-8075 1095-9203 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401433 doi: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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1766025616124018688 |