Lower mantle heterogeneity, dynamic topography and the geoid

Details Lower mantle heterogeneity, dynamic topography and the geoid Lower mantle heterogeneity, dynamic topography and the geoid

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.313..541h&link_type=abstract

Nature (ISSN 0028-0836), vol. 313, Feb. 14, 1985, p. 541-545. Research supported by the Alfred P. Sloan Foundation. Previously a

Computer Science

321

Deformation, Dynamic Response, Earth (Planet), Earth Mantle, Geoids, Topography, Density Measurement, Estimates, Gravitational Constant, Seismic Energy, Surface Properties

Scientific paper

Density contrasts in the lower mantle, recently imaged using seismic tomography, drive convective flow which results in kilometers of dynamically maintained topography at the core-mantle boundary and at the earth's surface. The total gravity field due to interior density constrasts and boundary topography predicts the largest wavelength components of the geoid remarkably well. Neglecting dynamic surface deformation leads to geoid anomalies of opposite sign than are observed.

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