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>Return to Research
Glacial rebound as a probe of mantle rheology
The analysis of delayed post-glacial rebound observations can provide a powerful, yet non-unique, constraint on the rheological structure of the Earth’s mantle. As part of my Ph.D. thesis, I developed a multi-scale approach (wavelet-like) to analyzing global harmonic fields. Together with Brad Hager, we used this approach to isolate that part of the geoid that is likely due to incomplete rebound. We then used this “isolated” signal to test a selected set of radial viscous models for the earth. The key result is the need for a relatively stiff continental keel and a weak channel below the keel and above the 670 km discontinuity (4). In a study led by Jerry Mitrovica, we reevaluated the available data set constraining the uplift history of shorelines in Hudson Bay and reestimated the effective relaxation times for different regions within Hudson Bay (8).
8 A Re-Appraisal of Post-Glacial Decay Times from Richmond Gulf and James Bay, Canada, J. Mitrovica, A. Forte, and M. Simons, Geophys. J. Int., 142, 783-800, 2000. [PDF]4 Localization of the gravity field and the signature of glacial rebound, M. Simons and B. H. Hager, Nature, 390, 500-504, 1997. [PDF]
Mark Simons' Paper Collection: Entire paper including figures are all made available online (within the bounds of copyright restrictions).
Last
modified
2 October, 2007
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