Computer Science
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...257..647n&link_type=abstract
Science (ISSN 0036-8075), vol. 257, no. 5070, July 31, 1992, p. 647-650. Research supported by NASA.
Computer Science
37
Atmospheric Circulation, Atmospheric Tides, Middle Atmosphere, Rotation, Venus Atmosphere, Atmospheric Models, Computerized Simulation, Meridional Flow, Zonal Flow (Meteorology)
Scientific paper
The cloud-level atmosphere of Venus takes little more than four days to complete one rotation, whereas the solid planet below has a 243-day period. Computer simulations of the circulation of the Venus middle atmosphere between 40 and 85 kilometers, as driven by solar radiation absorbed in the clouds, reproduce (1) the observed cloud-level rotation rate, (2) strong vertical shears above and below the cloud tops, and (3) midlatitude jets and strong poleward flow on the day side. Simulated circulations converge to yield nearly the same zonal winds when initialized with both stronger or weaker rotation rates. These results support the hypothesis that the observed cloud-top rotation rate is maintained by statistical balance between fluxes of momentum by thermal tides and momentum advection by mean meridional circulation.
Leovy Conway
Newman Matthew
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