Models of the thermal evolution of Venus in the parameterized convection approximation

Details Models of the thermal evolution of Venus in the parameterized convection approximation Models of the thermal evolution of Venus in the parameterized convection approximation

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986avest..20..287s&link_type=abstract

Astronomicheskii Vestnik (ISSN 0320-930X), vol. 20, Oct.-Dec. 1986, p. 287-305. In Russian.

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Convection Currents, Planetary Cores, Planetary Evolution, Planetary Temperature, Venus Atmosphere, Approximation, Boundary Conditions, Boundary Layers, Temperature Distribution, Vertical Distribution

Scientific paper

The thermal evolution of Venus in a parameterized convection approximation is examined. It is supposed that on Venus as on the Earth a double-layered convection takes place. The model is composed for four layers: the lithosphere (which includes the crust), the upper mantle, the lower mantle and the core (which may have a solid internal core). With help of the boundary conditions these four zones are joint to a complete evolution model. The thermal evolution of Venus is divided in three periods: (1) adjusting of the upper mantle to the thermal regime of the lower mantle ≡(0.5 - 1)×109y; (2) transition to a quasi-stationary regime ≡(1 - 2)×109y and (3) a quasi-stationary regime, at least ≡(1 - 2)×109y. The surface heat flow of Venus may not exceed 60 erg cm-2s-1 and a more probable estimate would be ≤50 erg cm-2s-1. The crust growing, thickness of the lithosphere and evolution of the core of Venus are also considered.

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