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Surface deformation, gravity and the geoid from a three-dimensional convection model at low Rayleigh numbersThe two-dimensional surface deformation, gravity field, and geoid are calculated from the temperature fields of a number of numerical models of constant-viscosity three-dimensional convective flows, heated from within and from below. The surface deformation and the geoid are insensitive to the short-wavelength features of the temperature variation; the gravity field is less smooth, although it still does not clearly indicate the narrowness of the upwelling and downwelling regions at large Rayleigh numbers. The results indicate that the convective upwelling beneath regions showing positive geoid and residual depth anomalies is more localized than the horizontal extent of these features would suggest. The results are relevant to attempts to understand the behavior of the earth mantle.
Document ID
19870060015
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Craig, Claire Harvey
(Texas, University Austin, United States)
Mckenzie, Dan
(Cambridge University United Kingdom)
Date Acquired
August 13, 2013
Publication Date
May 1, 1987
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 83
Issue: 1-4
ISSN: 0012-821X
Subject Category
Geophysics
Accession Number
87A47289
Funding Number(s)
CONTRACT_GRANT: NAG5-787
Distribution Limits
Public
Copyright
Other

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