Reviews of topical problems

Water dimer and the atmospheric continuum

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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.

Fulltext is available at IOP
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
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

Оригинал: Третьяков М Ю, Кошелев М А, Серов Е А, Паршин В В, Одинцова Т А, Бубнов Г М «Димер воды и атмосферный континуум» УФН 184 1199–1215 (2014); DOI: 10.3367/UFNr.0184.201411c.1199

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