A general circulation model of a Venus-like atmosphere

Physics

Scientific paper

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Atmospheric Circulation, Atmospheric Models, Venus Atmosphere, Angular Momentum, Atmospheric Boundary Layer, Atmospheric Heat Budget, Atmospheric Heating, Atmospheric Temperature, Meridional Flow, Surface Temperature, Three Dimensional Models, Venus Surface, Zonal Flow (Meteorology), Venus, Atmosphere, Circulation, Models, Rotation, Radiative Heating, Thermal Effects, Cooling, Thermal Properties, Convection, Eddies, Transport, Structure, Distribution, Dynamics

Scientific paper

Heat and momentum budgets are investigated for a three-dimensional general circulation model of a Venus-like, massive and slowly rotating atmosphere which is forced with an axisymmetric radiative heating/cooling distribution. Model results confirm the suggestions of Gierasch (1975) and Rossow and Williams (1979), with a mean meridional circulation which, despite its multicellular form, interacts with quasi-barotropic eddies produced by zonal flow shear instability to yield a weak superrotation of the entire model atmosphere. This process is sufficiently general to encourage the conclusion that it will occur in all slowly rotating atmospheres. Whether it can accelerate wind speeds as large as those observed on Venus cannot presently be determined.

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