Computer Science
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icar...64..157c&link_type=abstract
Icarus (ISSN 0019-1035), vol. 64, Nov. 1985, p. 157-182.
Computer Science
20
Carbon Monoxide, Diurnal Variations, Microwave Spectra, Planetary Composition, Venus Atmosphere, Absorption Spectra, Abundance, Atmospheric Models, Brightness Temperature, Mesosphere, Nocturnal Variations, Solar Planetary Interactions
Scientific paper
Microwave spectra of CO in the Venus mesosphere were measured and analyzed in order to provide mixing profiles. The results indicate that there is a significant dependence of the observed spectra on the phase of Venus. This dependence is tied to a diurnal variation in the vertical profile of CO mixing ratios with the local solar zenith angle. Spectra of the nightside hemisphere are characterized by very little absorption in the wings of the spectra, yet very deep absorption in the line center. Dayside spectra exhibit considerably greater absorption in the line wings and less absorption in the line center. Solutions for the CO mixing profile derived from spectra show that the nightside atmosphere contains two to four times the CO abundance above about 95 km relative to the dayside atmosphere above 95 km. Conversely, the dayside atmosphere between 80 and 90 km shows two to four times the CO abundance for the same altitude region in the nightside atmosphere.
Clancy Todd R.
Muhleman Duane O.
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