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Pressure broadening coefficients of the water vapor lines at 556.936 and 752.033 GHz
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2008 (English)In: Journal of Quantitative Spectroscopy and Radiative Transfer, ISSN 0273-1177, Vol. 109, no 1, 144-150 p.Article in journal (Refereed) Published
Abstract [en]

The air induced broadening coefficients of the pure rotational transitions of H2O at 556.936 GHz (110←101), and 752.033 GHz (211←202) were measured by terahertz time-domain spectroscopy. The air broadening coefficient was determined to be for the 556.936 GHz line and for the 752.033 GHz line, respectively. The present broadening coefficients for the 556.936 GHz water line are significantly smaller than those of Markov and Krupnov [Measurements of the pressure shift of the 1(10)–1(01) water line at 556.936 GHz produced by mixtures of gases. J Mol Spect 1995:172;211–4] but relatively close to the values of the HITRAN database. The measured data may improve the accuracy of the abundance of water vapor retrieved from spectra obtained by the Odin/SMR satellite instrument. The effect on the satellite retrieval processing is discussed.

Place, publisher, year, edition, pages
2008. Vol. 109, no 1, 144-150 p.
Keyword [en]
Pressure broadening, Water vapor, Terahertz time-domain spectroscopy, Submillimeter, Odin/SMR
URN: urn:nbn:se:su:diva-11029DOI: doi:10.1016/j.jqsrt.2007.06.004ISI: 000251494600011OAI: diva2:177548
Available from: 2009-01-13 Created: 2009-01-13 Last updated: 2011-01-10Bibliographically approved

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Lossow, Stefan
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Department of Meteorology

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