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Reviews of topical problems


Water dimer and the atmospheric continuum

, , , , ,
Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences, ul. Ulyanova 46, Nizhny Novgorod, 603000, Russian Federation

The physical origin of the water-related atmospheric continuum absorption is examined. Existence of double water molecules (dimers) in equilibrium water vapor at room temperature is proved by direct spectroscopic experiment supported by ab initio calculations. It is demonstrated that diluting water vapor by air does not essentially reduce the dimer abundance. Numerous earlier studies have predicted the presence of water dimers in the atmosphere and their influence on chemical reactions, homogeneous condensation and the Earth's radiation balance. Our results provide experimental proof of the presence of dimers in the atmosphere, thus enabling a detailed study of their role in natural processes. Prospects for future research are discussed.

Text can be downloaded in Russian. English translation is available here.
PACS: 33.20.−t, 36.40.Mr, 51.70.+f, 82.30.Rs, 92.60.Jq, 92.60.Ta (all)
DOI: 10.3367/UFNe.0184.201411c.1199
URL: https://ufn.ru/en/articles/2014/11/c/
Citation: Tretyakov M Yu, Koshelev M A, Serov E A, Parshin V V, Odintsova T A, Bubnov G M "Water dimer and the atmospheric continuum" Phys. Usp. 57 1083–1098 (2014)
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Received: 21st, February 2014, revised: 11th, April 2014, 18th, April 2014

:   ,   ,   ,   ,   ,    «   » 184 1199–1215 (2014); DOI: 10.3367/UFNr.0184.201411c.1199

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