Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9525708 | Journal of Geodynamics | 2005 | 13 Pages |
Abstract
In a previous work, cast in axisymmetric flat geometry, we have shown that a realistic composite rheology (linear plus nonlinear) for the Earth's mantle reproduces the postglacial isostatic readjustment of Laurentia significantly better than a purely linear one. In this work we address the same problem in a 3D flat geometry allowing to apply the ice load described by the ICE-3G deglaciation history without manipulations. Computation is numerically carried out through finite elements as the nonlinear formulation prevents the use of spectral methods. The goodness of fit is quantitatively tested by comparing observed and computed Relative Sea Level (RSL) data at 29 North American sites for the last 8âkyr. The mixed rheology model still shows a slightly but significantly better fit (in the statistical sense) than the linear model.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Giulio Dal Forno, Paolo Gasperini, Enzo Boschi,