Spectral structure of the water vapour continuum absorption in 2.7 and 6.25 micron bands

Igor V. Ptashnik; Tatyana E. Klimeshina; Tatyana M. Petrova; Alexander A. Solodov; Alexander M. Solodov

doi:10.1117/12.2205414

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19 November 2015 Spectral structure of the water vapour continuum absorption in 2.7 and 6.25 μm bands

Igor V. Ptashnik, Tatyana E. Klimeshina, Tatyana M. Petrova, Alexander A. Solodov, Alexander M. Solodov

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Proceedings Volume 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics; 968006 (2015) https://doi.org/10.1117/12.2205414
Event: XXI International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2015, Tomsk, Russian Federation

Abstract

For the first time, the low-temperature (from -9 to 15 ° C) Fourier Transform Spectroscopy laboratory measurements of the pure water vapor absorption spectra are performed in the near-infrared spectral region, and self-continuum absorption is retrieved within 1600 cm^-1 (6.25 μm) and 3600 cm^-1 (2.7μm) absorption bands. The proportion of true-bound and quasi-bound water dimers in the equilibrium water vapor is derived by fitting their model spectra to the spectral features of the retrieved continuum. The results are in reasonable agreement with statistical calculations and support the idea of complimentary contribution stable and metastable dimers to the spectral structure of water vapor continuum within absorption bands.

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Igor V. Ptashnik, Tatyana E. Klimeshina, Tatyana M. Petrova, Alexander A. Solodov, and Alexander M. Solodov "Spectral structure of the water vapour continuum absorption in 2.7 and 6.25 μm bands", Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 968006 (19 November 2015); https://doi.org/10.1117/12.2205414

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