GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia
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. 10.1126/science.1137157Full text not available from this repository.
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.
|NORA Subject Terms:||Marine Sciences|
|Date made live:||30 Aug 2012 13:56|
Actions (login required)