Superrotation induced by critical-level absorption of gravity waves on Venus - an assessment

Details Superrotation induced by critical-level absorption of gravity waves on Venus - an assessment Superrotation induced by critical-level absorption of gravity waves on Venus - an assessment

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jats...44.1049h&link_type=abstract

Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 44, April 1, 1987, p. 1049-1061.

Computer Science

30

Atmospheric Models, Gravity Waves, Planetary Rotation, Superrotation, Venus Atmosphere, Continuous Spectra, Wave Propagation, Wind Shear, Zonal Flow (Meteorology), Venus, Gravity Properties, Gravity Waves, Rotation, Absorption, Spectra, Atmosphere, Winds, Circulation, Velocity, Acceleration, Flux, Analysis, Momentum, Spacecraft Observations, Pioneer Venus Orbiter, Models, Energy, Calculations, Thermal Effects, Damping, Structure, Magnitude, Density, Amplitude

Scientific paper

Critical-level absorption of a continuous spectrum of vertically propagating gravity waves is proposed as the mechanism for supporting the superrotation in the deep Venus atmosphere (below the cloud deck). It is shown that the observed westerly zonal wind effectively separates regions where waves of opposite phase speeds are absorbed, leading to westerly mean-flow acceleration below the clouds and easterly above. Using the diagnostic results of Hou and Goody (1985), a quantitative assessment of the required wave spectrum and fluxes of energy and momentum is obtained, and it is shown that they are compatible with observational constraints.

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