Dimer Absorption within Water Vapor Bands in the IR Region

Contributions of the absorption by water dimers to the continuum absorption by water vapor within the IR region are analyzed. They are defined as the difference between experimental data and asymptotic line wing theory (ALWT) calculations. In the ALWT calculations, the line profiles are used with pa...

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Bibliographic Details
Published in:Atmospheric and oceanic optics 2020-03, Vol.33 (2), p.134-140
Main Authors: Bogdanova, Yu. V., Klimeshina, T. E., Rodimova, O. B.
Format: Article
Language:English
Subjects:
Absorption
Dimers
Experimental data
Lasers
Mathematical analysis
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Profiles
Spectroscopy of Ambient Medium
Water vapor
Water vapour
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Summary:Contributions of the absorption by water dimers to the continuum absorption by water vapor within the IR region are analyzed. They are defined as the difference between experimental data and asymptotic line wing theory (ALWT) calculations. In the ALWT calculations, the line profiles are used with parameters fitted to the Burch experimental data and to the FTIR measurements in the IR water vapor windows. Calculations with the line profile which describes the Burch data in the 2000–3000 cm −1 range are in a good agreement with CRDS measurements between other IR water vapor bands. Both profiles provide close absorption values within the water vapor bands presumably due to the contribution of stable dimers.
ISSN:1024-8560
2070-0393
DOI:10.1134/S1024856020020013