Physics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...90..282d&link_type=abstract
Icarus (ISSN 0019-1035), vol. 90, April 1991, p. 282-298. University of California-supported research.
Physics
8
Carbon Monoxide, Continuous Radiation, Line Spectra, Microwave Interferometers, Venus Atmosphere, Atmospheric Composition, Brightness Temperature, Radio Observation, Spectral Resolution, Venus, Carbon Monoxide, Emissions, Earth-Based Observations, Dayside, Interferometry, Brightness Temperature, Nightside, Temperature, Clouds, Opacity, Atmosphere, Spectra, Models, Altitude, Radiowave Methods, Procedure, Distribution, Wavelengths, Comparsions, Absorption, Mixing Ratio, Diurnal Variation, Concentration, Sulfu
Scientific paper
Venus 2.7-mm continuum emission and CO J = 1-0 transition observations conducted in January 1987, when Venus was at western elongation, indicate a 10 percent brightness temperature increase from the day to the nightside. It is suggested that this brightness temperature variation, which is greater than anticipated on the basis of physical variations in temperature, may be associated with potentially cloud-related atmospheric opacity variations. Model fits to the CO spectra suggest that, while the CO at altitudes greater than 90 km decreases from night to day, low altitude CO may exhibit a general enhancement.
de Pater Imke
Rudolph Andreas
Schloerb Peter F.
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