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• The O2 absorption spectra induced by CO2 pressure in the 13,000–13,260 cm−1 region. • The accurate parameters of 40 O2 absorption lines induced by CO@ pressure were obtained. High-resolution spectra of O 2 broadened by CO 2 pressure with high signal/noise ratio (2500 at the absorbance equal 1) were recorded with a Bruker IFS 125 FTIR spectrometer in the 13,000–13,260 cm−1 spectral region. The multispectrum fitting procedure has been applied to recover the spectral line parameters from measurements using the Voigt and speed-dependent Voigt (SDV) profiles. The O 2 absorption line parameters for 40 transitions were measured. The parameters for SDV profile were studied for the first time. The uncertainty of the broadening coefficients for the unblended O 2 absorption lines was estimated to be <3 %. The determined parameters were compared to HITRAN2020 and literature data. The values of the self-broadening coefficients and intensities were in good agreement with literature data. [Display omitted] [ABSTRACT FROM AUTHOR]

• The H 2 O absorption spectra induced by CO2 pressure in the 5150–5550 cm–1 region. • The CO 2 -broadening and shift coefficients of about 170 H 2 O lines were obtained. • The calculations of line broadening and shift coefficients were performed using the semi-empirical method. The high-resolution H 2 O absorption spectra induced by CO 2 pressure have been recorded using a Bruker IFS 125 HR FTIR spectrometer at room temperature in the 5150–5550 cm–1 spectral region. A multispectrum fitting procedure has been applied to these spectra to recover the spectral line parameters using the speed-dependent Voigt profile. The water vapor line broadening and shift coefficients for lines of two vibrational bands ν 2 +ν 3 and ν 1 +ν 2 were obtained. An uncertainty of the broadening coefficients for the unblended H 2 O absorption lines was estimated to be 2–3%. The calculations of line-broadening and line-shifting parameters were performed using the semi-empirical method which is based on the impact theory and enables a realistic prediction modified by introducing additional parameters obtained by using empirical data. The root mean square deviations of measured and calculated line widths and shifts were 0.0086 and 0.0053 cm−1 atm−1, respectively. [ABSTRACT FROM AUTHOR]

Highlights • CO 2 -broadening and shift coefficients of the sulfur dioxide in the 4 µm region. • Measured CO 2 -broadening coefficients for SO 2 are smaller than those from HITRAN2016. • Mean value of the CO 2 -shift coefficients for SO 2 in the 4 µm region is −0.0027 cm−1 atm−1. Abstract The absorption spectra of the mixture of SO 2 and CO 2 at different partial pressures of both gases have been recorded at room temperature in the 4 µm region using the Bruker IFS 125 HR FTIR spectrometer. The multispectrum fitting procedure has been applied to these spectra to recover the CO 2 -broadening and shift parameters of the sulfur dioxide spectral lines. The CO 2 broadening and the pressure induced shift coefficients for 1422 and 116 lines of the ν 1 + ν 3 A -type band of 32S16O 2 and 34S16O 2 , respectively, have been derived. Beside, these coefficients have been derived for 254 lines of the ν 1 + ν 2 + ν 3 − ν 2 hot band of 32S16O 2. The rotational dependence of the values of these coefficients is discussed. The CO 2 pressure induced shift coefficients for this molecule are published for the first time. The comparison of the obtained broadening coefficients to those published by other authors for one pure rotational line and for the lines of the ν 1 B -type band is given. [ABSTRACT FROM AUTHOR]