Water vapour line intensities and self-broadening coefficients in the 5000–5600 cm−1 spectral region

Abstract This paper presents results from an intercomparison of self-broadening coefficients and intensities of approximately 440 of the strongest water vapour lines in the spectral region 5000–5600 cm −1 . Line parameters retrieved and reported recently by two scientific groups, both using Fourier transform spectroscopy, are compared with parameters taken from the HITRAN-2008 database and with theoretical linelist BT2. This comparison has revealed marked systematic differences in the self-broadening coefficients (up to 20%) and to lesser degree in the line intensities (up to 6%) between different sources.