Dynamic surface topography - A new interpretation based upon mantle flow models derived from seismic tomography

Details Dynamic surface topography - A new interpretation based upon mantle flow models derived from seismic tomography Dynamic surface topography - A new interpretation based upon mantle flow models derived from seismic tomography

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..225f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 3, p. 225-228.

Physics

48

Earth Mantle, Free Convection, Hydrostatics, Seismology, Tomography, Topography, Geoids, Viscous Flow

Scientific paper

The very long wavelength dynamic topography at the earth's surface, estimated by isostatic reduction of the observed topography, is shown to be in good agreement with the topography predicted by a model of viscous flow in the mantle. This flow model was previously derived by independent consideration of the observed nonhydrostatic geoid and is based upon a recent model of large-scale seismic shear velocity heterogeneity in the mantle. Our estimate of the long wavelength dynamic surface topography reveals significant depressions of the continental shields relative to their hydrostatic reference positions.

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