Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pazh...10..696g&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 10, Sept. 1984, p. 696-701) Soviet Astronomy Letters (ISSN 0360-0327), vol. 10, Sept.-O
Astronomy and Astrophysics
Astronomy
Atmospheric Temperature, Night Sky, Planetary Temperature, Radiant Cooling, Thermosphere, Venus Atmosphere, Carbon Dioxide, Carbon Monoxide, Infrared Radiation, Molecular Rotation, Temperature Profiles, Water Vapor
Scientific paper
A mechanism is proposed and discussed that may account for the extraordinarily low temperatures in the nightside upper atmosphere of Venus: cooling by the emission of infrared radiation in the rotational band of the H2O molecule, which represents a minor constituent of the atmosphere. A theoretical model for quantitative description has been devised which yields height profiles of the temperature and the CO2, CO, O, H2O abundances in the layer 100-170 km near the antisolar point. Along with molecular heat conduction, the model includes processes which may warm and cool the upper atmosphere, including: infrared radiational cooling in the H2O rotational band, the 15 micron CO2 band, the CO rotational band, and the 63 micron line of atomic oxygen; warming by the infrared radiation of the lower atmosphere in the 15 micron CO2 band; and wind energy transport.
Gordiets B. F.
Kulikov Yu. N.
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