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Atmospheric and Oceanic Optics

2019 year, number 5

Broadening and shift coefficients of water vapor absorption lines in 8650-9020 cm-1 spectral region

V.M. Deichuli1,2, T.M. Petrova1, Yu.N. Ponomarev1, A.M. Solodov1, A.A. Solodov1
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634055, Russia
2National Research Tomsk State University, 36, Lenin Avenue, Tomsk, 634050,Russia
Keywords: коэффициенты уширения и сдвига, Фурье-спектрометр, водяной пар, broadening and shift coefficients, Fourier spectrometer, water vapor


The broadening and shift coefficients of H2O absorption lines are compared for Ar, He, H2, and N2 buffer gases. The broadening and shift coefficients were derived from the analysis of the absorption spectra recorded with a Fourier spectrometer in the spectral range 8650-9020 cm-1 with a spectral resolution of 0.01 cm-1. Using two models of line profiles (Voigt and speed-dependent Voigt profiles) the parameters of the H2O absorption lines were calculated. It is shown that the speed-dependent Voigt profile provides better agreement with experimental data.