Published February 14, 1985
| public
Journal Article
Lower mantle heterogeneity, dynamic topography and the geoid
Abstract
Density contrasts in the lower mantle, inferred using seismic tomography, drive viscous flow; this results in kilometres of dynamically maintained topography at the core-mantle boundary and at the Earth's surface. The total gravity field due to interior density contrasts and dynamic boundary topography predicts the longest-wavelength components of the geoid remarkably well. Neglecting dynamic surface deformation leads to geoid anomalies of opposite sign to those observed.
Additional Information
© 1985 Nature Publishing Group. Received 2 July; accepted 29 October 1984. We thank D. L. Anderson, C. Chase, R. J. O'Connell and D. J. Stevenson for helpful comments. This work was supported by NASA grants NAG5-315, NSG-7610, NAS5-27226, NSF grant EAR-8317623, by the Alfred P. Sloan Foundation (B.H.H.), and by a Bantrell Postdoctoral Fellowship (R.P.C.). Contribution no. 4065, Division of Geological and Planetary Sciences, California Institute of Technology.Additional details
- Eprint ID
- 34966
- Resolver ID
- CaltechAUTHORS:20121018-093742377
- NAG5-315
- NASA
- NSG-7610
- NASA
- NAS5-27226
- NASA
- EAR-8317623
- NSF
- Alfred P. Sloan Foundation
- Bantrell Fellowship
- Created
-
2012-10-18Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Caltech groups
- Seismological Laboratory, Division of Geological and Planetary Sciences
- Other Numbering System Name
- Caltech Division of Geological and Planetary Sciences
- Other Numbering System Identifier
- 4065