Spectra calculations in central and wing regions of CO2 IR bands. IV: software and database for the computation of atmospheric spectra

In the preceding companion papers a model, based on the impact and the Energy-Corrected Sudden approximations, was proposed for the calculation of the absorption shape of CO2 in both central and wing regions of infrared bands. It was successfully tested using laboratory measurements as well as atmospheric transmission and emission spectra in the 10-20μm interval. In the present paper, this approach is used to generate a set of suitable parameters and FORTRAN software for the calculation of absorption by CO2 under atmospheric conditions which can be easily included in radiance/transmission computer codes. This package which includes all bands of significant contribution to atmospheric spectra, is an extension, now accounting for all P, Q, and R lines, of the tools proposed previously for Q branches only. Comparisons between balloon-borne limb emission stratospheric spectra and the results of forward calculations confirm the quality of the tools proposed.