An intercomparison of measured pressure-broadening, pressure shifting parameters of carbon dioxide and their temperature dependence

Robert R. Gamache (1) , Julien Lamouroux (1, 2) , Valérie Blot-Lafon (3) , Eldon Lopes (1)

1 Department of Environmental, Earth, and Atmospheric Sciences [Lowell]
2 LISA (UMR_7583) - Laboratoire Interuniversitaire des Systèmes Atmosphériques
3 Department of Physics

An intercomparison of measured pressure-broadening and pressure-shifting coefficients for carbon dioxide absorption lines was done. The work focuses on collision systems where a significant number of data can be found (CO2-N2, CO2-O2, CO2-air, and CO2-CO2) and yield information important to applications related to Earth's atmosphere. The literature was searched for measured line shape parameter data for the collision systems mentioned above. Databases were created for each perturbing gas with the ro-vibrational transition as the key. Using these databases intercomparisons of the measurements of half-widths, their temperature dependence, and line shifts were made. The data allow the investigations of trends in the data with respect to the vibrational and the rotational quantum numbers, various line shape models, and isotopologue effects.

Mots clés: CO2; Measured half-widths; Line shifts; Temperature dependence of half-width and line shift

Domaines: Sciences de l'environnement; Océan, Atmosphère

Robert R. Gamache, Julien Lamouroux, Valérie Blot-Lafon, Eldon Lopes. An intercomparison of measured pressure-broadening, pressure shifting parameters of carbon dioxide and their temperature dependence. Journal of Quantitative Spectroscopy and Radiative Transfer, 2014, 135, pp.30-43. ⟨10.1016/J.JQSRT.2013.11.001⟩. ⟨hal-00990428⟩