The water dimer millimeter-wave spectrum at ambient conditions: A simple model for practical applications

A simple model of the water dimer millimeter-wave spectrum at pressures and temperatures typical of Earth׳s atmosphere is proposed. The model is based on high accuracy ab initio calculations and is supported by experimental observations of the dimer spectrum in cold molecular beams. It is demonstrat...

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Published inJournal of quantitative spectroscopy & radiative transfer Vol. 140; pp. 75 - 80
Main Authors Odintsova, T.A., Tretyakov, M.Yu, Krupnov, A.F., Leforestier, C.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2014
Subjects
Atmospheric observations
Millimeter waves
Spectral model
Water dimer
Spectral model
Atmospheric observations
Water dimer
Millimeter waves
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Summary:A simple model of the water dimer millimeter-wave spectrum at pressures and temperatures typical of Earth׳s atmosphere is proposed. The model is based on high accuracy ab initio calculations and is supported by experimental observations of the dimer spectrum in cold molecular beams. It is demonstrated that the model corresponds to the spectra calculated ab initio and recorded at room temperature. The model is used for assessing atmospheric brightness temperature variations caused by the water dimer absorption. A possibility of direct radiometric observation of the dimer in the Earth׳s atmosphere is shown. •A simple model for quantitative analysis of warm water dimer spectra has been developed.•The model correlates well with the experimental observations.•A possibility of direct detection of the water dimer in the atmosphere is shown.
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ISSN:0022-4073
1879-1352
DOI:10.1016/j.jqsrt.2014.02.016