Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1336i&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1336
Physics
Scientific paper
Possible existence of heat-induced circulation in Venus's tropical atmosphere is studied using an analytical solution on the equatorial -plane. Large-scale topographic rises including Aphrodite terra in the equatorial region provide heat sources in the atmosphere away from the surface. Such heat sources might induce planetary-scale axi-asymmetric tropical circulation. Although the (retrograde) rotation of Venus is slow, the low static stability of the atmosphere leads to a relatively small deformation radius, enabling the circulation being trapped in the low latitude. The response of the circulation is amplified when the background wind speed is near the phase speed of the Rossby wave or the inertio-gravity wave. The correlation between the zonal and meridional winds induces equatorward transport of zonal momentum and might contribute to the maintenance of the super-rotation. The combination of the rising motion in the heating region and the descending motion in the cooling region transports heat upward, thereby stabilizing the stratification.
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