Rotational relaxation of the 00(0)1 level of CO2 including radiative transfer in the 4.3-micron band of planetary atmospheres

Details Rotational relaxation of the 00(0)1 level of CO2 including radiative transfer in the 4.3-micron band of planetary atmospheres Rotational relaxation of the 00(0)1 level of CO2 including radiative transfer in the 4.3-micron band of planetary atmospheres

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jqsrt..34..101k&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 34, Aug. 1985, p. 101-114.

Astronomy and Astrophysics

Astronomy

3

Carbon Dioxide, Infrared Astronomy, Molecular Rotation, Planetary Atmospheres, Radiative Transfer, Astronomical Models, Mars Atmosphere, Molecular Relaxation, Optical Thickness, Spectral Bands, Thermodynamic Equilibrium, Transition Probabilities, Upper Atmosphere, Venus Atmosphere

Scientific paper

The optical thickness in the 4.3-micron band of CO2 in the upper layers of the atmospheres of Mars and Venus will be large, and substantial deviations from LTE must occur. For the determination of the populations of the rotational levels, a combined solution of the rotational relaxation and radiative transfer problems in the lines of the band is required. In the present study, a simplified model has been considered for the rotational distribution of CO2 molecules in the 00(0)1 vibrational state, taking into account radiative transfer in the 4.3 micron fundamental band in an optically thick atmosphere. It is pointed out that this model retains the main features of the corresponding problem for the upper layers of carbon dioxide atmospheres of Venus and Mars.

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