Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65.1300s&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, Nov.-Dec. 1988, p. 1300-1307. In Russian.
Astronomy and Astrophysics
Astronomy
Carbon Dioxide, Infrared Spectra, Mars Atmosphere, Planetary Limb, Venus Atmosphere, Infrared Absorption, Radiant Flux Density, Thermodynamic Equilibrium, Vertical Distribution, Vibrational Spectra
Scientific paper
Theoretical estimates of limb total band radiance in the vibration-rotation CO2 bands are presented for the first time for both Venus' and Mars' atmospheric layers with nonequilibrium population of vibrational CO2 states. The daytime vertical profiles of limb radiance have been obtained in the 1.2; 1.4; 1.6; 2.0; 2.7 and 4.3 μm bands, and the nighttime ones - in the 4.3 μm band only. The daytime profiles have a radiance maximum caused by the increase of the vibrational states population with altitude, which is due to sunshine absorption in the infrared CO2 bands. The nighttime profiles reveal an abrupt decrease in the radiance lapse rate with altitude, which is caused by the population maximum of vibrational states due to tropospheric thermal radiation absorption in the 4.3 μm band.
Shved Gustav M.
Stepanova G. I.
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