Spectroscopy and physics of atoms and molecules

Temperature dependence of CO$_2$ line broadening induced by CO$_2$ in the $\nu_1+\nu_3$ band

A. S. Dudaryonok, T. A. Nevzorova, N. N. Lavrentieva

Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Science, Tomsk

Abstract: Sulfur-dioxide line profile parameters at different temperatures are important for the remote sensing of atmospheric gases and monitoring of the environment's state. They are of great importance for monitoring volcanic activity on planets such as Venus and Mars, since their atmospheres consist mainly of carbon dioxide. The work presents the temperature dependence of the broadening coefficients of sulfur dioxide R-branch lines by carbon dioxide pressure in the $\nu_1+\nu_3$ band. The line widths are calculated in the range of 150–700K using the semi-empirical method, the parameters of which were obtained as a result of the analysis of experimental data. The temperature exponents are computed using a power law.

Keywords: line profile parameters, line broadening, temperature exponent, sulfur dioxide, carbon dioxide, Martian atmosphere, Venusian atmosphere.

Received: 28.04.2025
Revised: 28.04.2025
Accepted: 08.06.2025

DOI: 10.61011/OS.2025.07.61104.7896-25

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