Optika Atmosfery i Okeana Journal

Vol. 35, issue 01, article # 1

Simonova A. A., Ptashnik I. V. Water dimer contribution to the water vapor self-continuum absorption in fundamental bending and stretching bands. // Optika Atmosfery i Okeana. 2022. V. 35. No. 01. P. 5–11. DOI: 10.15372/AOO20220101 [in Russian].
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Abstract:

The nature of the water vapor self-continuum absorption is investigated within fundamental bending and stretching bands at 279–351 K. The integral contribution of the water dimer absorption to the experimental water vapor continuum is preliminary estimated based on the available spectroscopic information as 70–40% in the 1600 cm^-1 band and 90–60% in the 3600 cm^-1 band; the inverse temperature dependence is shown. The analysis of the temperature dependences of the continuum absorption and its components indicates the probable contribution of the water monomer line wings to the continuum along with the absorption by water dimers.

Keywords:

continuum absorption, water vapour, spectral parameters, absorption bands, water vapor, intermediate line wings, temperature dependence

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