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The water vapour line broadening ( γ ) and shift ( δ ) coefficients for 319 lines of 11 vibrational bands 2ν 3 , 2ν 2  +ν 3 , 3ν 2 +ν 3 , 5ν 2 , 6ν 2 , ν 1 +ν 3 , ν 1 +ν 2 +ν 3 , ν 1 +2ν 2 , ν 1 +3ν 2 , 2ν 1 , and 2ν 1 +ν 2  from the spectral region 7520–8586 cm –1  induced by air pressure were measured with a Bruker IFS 125 spectrometer. The measurements were performed at a spectral resolution of 0.01 cm –1  and over a wide air pressure range. The calculations of the line-shift coefficients  δ  were performed in the framework of a semi-classical method. The measured air-broadening coefficients  γ  were combined with literature data for air- and N 2 -broadening coefficients  γ  measured for the lines in the 380–22,593 cm –1  spectral region. Combined experimental data for  N  = 4110 measured coefficients  γ  of 76 vibrational bands of H 2 O molecules were fitted to the empirical functions. The computed coefficients  γ  derived from the fitted parameters were statistically compared with the measurements. The vibrational dependence of the measured  γ  values and their compatibility is discussed.

Measurements of air-broadening parameters of water vapour transitions in the 7520–8586 cm −1 spectral region