H2O absorption line parameters in the 5900–6100 cm–1 spectral region
V.M. Deichuli, T.M. Petrova, A.M. Solodov, A.A. Solodov, T.Yu. Chesnokova, A.M. Trifonova-Yakovleva
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: water vapor, Fourier transform spectroscopy, atmospheric transmission, absorption line parameters
Abstract
The H2O absorption lines broadened by air pressure were recorded in the 5900-6100 cm-1 spectral region with the use of a Bruker IFS 125 HR spectrometer. The intensities and broadening and shift coefficients of H2O absorption lines are retrieved for Voigt profile and modified Voigt profile which takes into account the dependence of the broadening on the speed of colliding molecules. The atmospheric transmission is calculated with use of H2O line parameters from different versions of the HITRAN and GEISA spectroscopic databases and our new data. Model spectra are compared with atmospheric solar spectra measured with a ground-based Fourier spectrometer. It is shown that the use of our new data on H2O absorption line parameters improves the agreement between the model and measured atmospheric spectra.
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