Rotational relaxation of the 0001 level of CO2 including radiative transfer in the 4.3-μm band of planetary atmospheres.
Abstract
The paper contains accurate numerical solutions of the problem of rotational relaxation of the C12O216 molecules in the 0001 level in conjunction with the transfer of radiation in the lines of the 0001-0000 transition of the 4.3-μm band in a plane-parallel isothermal atmosphere consisting of pure carbon dioxide. This model atmosphere is illuminated by the sun, and has a pressure profile given by the barometric formula. The band lines are assumed to be nonoverlapping, with line shapes described by Voigt profiles depending on temperature and pressure. The transfer problem has the form of a multiplet with a large number of lines with a common lower level. The most recent data on the rotational transition probabilities due to molecular collisions have been used. This work may be viewed as the first attempt to model the formation of the rotational populations of a vibrational level of CO2 in the upper atmospheres of Venus and Mars.
- Publication:
-
Journal of Quantitative Spectroscopy and Radiative Transfer
- Pub Date:
- August 1985
- DOI:
- 10.1016/0022-4073(85)90037-8
- Bibcode:
- 1985JQSRT..34..101K
- Keywords:
-
- 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;
- Atomic and Molecular Physics;
- Mars Atmosphere:Radiative Transfer;
- Radiative Transfer:Mars Atmosphere;
- Radiative Transfer:Venus Atmosphere;
- Venus Atmosphere:Radiative Transfer