Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jgre..11412004y&link_type=abstract
Journal of Geophysical Research, Volume 114, Issue E12, CiteID E12004
Physics
2
Atmospheric Processes: Planetary Meteorology (5445, 5739), Atmospheric Processes: General Circulation (1223), Planetary Sciences: Fluid Planets: Meteorology (3346)
Scientific paper
The dynamics of Venus' lower-atmospheric superrotation remain an open issue. In the present study, we investigate the sensitivity of the superrotation to diabatic heating rate below the cloud layer using a simplified GCM. A fully developed superrotation fails to develop in the lower atmosphere under the condition with a fairly low diabatic heating below the cloud layer, as is thought to be realistic. Additional radiative forcing in the lower atmosphere and/or eddy momentum source should be considered to produce lower-atmospheric superrotation. The diabatic heating rate below the cloud layer controls the formation of the multiple superrotation states (slow, fast, and extremely fast superrotations). Small changes in the weak lower-atmospheric heating lead to drastic changes of the middle- and lower-atmospheric superrotation.
Takahashi Masaaki
Yamamoto Masaru
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