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Surface deformation and geoid anomalies over single and double-layered convective systemsUsing a primitive variable formulation of the finite-element method, the differences in the surface observables, such as topography and geoid, produced by single- and double-layered thermal convection, were compared. Both constant and depth-dependent viscosities have been considered. For the same Rayleigh number, larger surface perturbations are produced by single-cell convection. For the same Nusselt number, the magnitudes of the surface observables are greater for double-layered convection. For the same surface heat-flux, surface topographies have similar magnitudes, but the relative amplitudes of geoid anomalies depend greatly on the style of viscosity stratification. This difference in the geoid between the two systems increases with greater surface heat-flow, regardless of viscosity structure.
Document ID
19860028009
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Koch, M.
(Karlsruhe, Universitaet Germany)
Yuen, D. A.
(Colorado, University; Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: Geophysical Research Letters
Volume: 12
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
86A12747
Funding Number(s)
CONTRACT_GRANT: NSF EAR-82-14094
CONTRACT_GRANT: NAG5-400
CONTRACT_GRANT: DFG-SFB-108
Distribution Limits
Public
Copyright
Other

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