Global coupling of earth surface topography with hotspots, geoid and mantle heterogeneities

Details Global coupling of earth surface topography with hotspots, geoid and mantle heterogeneities Global coupling of earth surface topography with hotspots, geoid and mantle heterogeneities

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989natur.340...54c&link_type=abstract

Nature (ISSN 0028-0836), vol. 340, July 6, 1989, p. 54-57.

Physics

69

Earth Mantle, Earth Surface, Geoids, Topography, Convection, Geotemperature, Seismology, Spherical Harmonics

Scientific paper

It is shown here that the global surface topography, corrected for shallow density variations inside the lithosphere, presents a strong degree 2 pattern, with uplifted regions well correlated with hotspot concentration, geoid highs, and hot lower mantle. This long-wavelength topography probably represents the dynamic response of the earth's surface to mantle convection. Used together with geoid and seismic velocity anomalies, it should provide an important constraint on convection models.

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