Surface deformation and geoid anomalies over single and double‐layered convective systems

Manfred Koch, D. A. Yuen

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Using a primitive variable formulation of the finite‐element method, we have compared the differences in the surface observables, such as topography and geoid, produced by single‐ and double‐layered thermal convection. 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.

Original languageEnglish (US)
Pages (from-to)701-704
Number of pages4
JournalGeophysical Research Letters
Volume12
Issue number10
DOIs
StatePublished - Oct 1985

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