Influence of temperature boundary conditions and density stratification on convective onset in planetary atmospheres

Details Influence of temperature boundary conditions and density stratification on convective onset in planetary atmospheres Influence of temperature boundary conditions and density stratification on convective onset in planetary atmospheres

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984laus.iafcq....i&link_type=abstract

International Astronautical Federation, International Astronautical Congress, 35th, Lausanne, Switzerland, Oct. 7-13, 1984. 8 p.

Other

Atmospheric Stratification, Boundary Conditions, Convective Flow, Planetary Atmospheres, Astronomical Models, Atmospheric Circulation, Atmospheric Density, Boundary Value Problems, Density Distribution, Temperature Effects, Thermal Conductivity

Scientific paper

The inclusion of astrophysical temperature boundaries in a hydrodynamic model for atmospheric motions on giant planets is shown to ameliorate discrepancies observed due to convective motions in the atmospheres. The atmosphere is treated as a series of gas shells of finite thickness in contact with each other at common boundaries; each zonal shell features an equilibrium gas distribution. Heat from the planet causes convective forces in the zones and transfers between them at the boundaries. A shooting method was used to solve eigenvalue problems for heat transport at the boundaries. The formulations were based on a previous model for the convective envelopes of stars. Density stratification was found to stabilize the layers. Low conductivity of the medium destabilized the layer and enhanced horizontal convective stratification. The conditions are valid for planets but not for stars, where stratification is stronger.

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