Water Molecule Absorption Line Intensities in the IR Spectral Region

Abstract

H₂O absorption lines broadened by air pressure were recorded at an IFS 125HR Fourier spectrometer in the 3000–7500 cm⁻¹ spectral region. The H₂O absorption line intensities are determined with a modified Voigt profile, which considers the dependence of the broadening on the speed of colliding molecules. The results are compared with literature data. The intensities of the H₂O absorption lines obtained in this work can be used both as a basis for improving the calculations of absorption lines and in different atmospheric applications that require high precision intensity values.