Computer Science – Numerical Analysis
Scientific paper
Jun 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jats...32.1038g&link_type=abstract
Journal of the Atmospheric Sciences, vol. 32, June 1975, p. 1038-1044.
Computer Science
Numerical Analysis
65
Atmospheric Circulation, Meridional Flow, Rotating Fluids, Venus Atmosphere, Angular Momentum, Astronomical Models, Momentum Transfer, Numerical Analysis, Planetary Rotation, Turbulent Diffusion, Vertical Motion
Scientific paper
A meridional cell, with rising motion near the equator and sinking near the poles, transports angular momentum upward in an atmosphere whenever equatorial regions of the atmosphere have an angular-momentum surplus relative to polar regions. This process may contribute to the maintemance of the Venus atmospheric superrotation. Superrotation by this process is exhibited in a simple analytical model, and the superrotation ratio in the model is derived. For the mechanism to work, some eddy process must maintain an angular-momentum surplus in equatorial regions. Vorticity mixing is suggested. It is also demonstrated that if the Richardson number is large in a cyclostrophic atmosphere, the mean thermal structure is given by global radiative equilibrium, and local deviations from equilibrium are balanced by adiabatic cooling or warming associated with vertical motions.
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