Line Mixing in Water Vapor and Methane

A multispectrum fitting algorithm has been used to identify line mixing and determine mixing parameters for infrared transitions of H2O and CH4 in the 5-9 mum region. Line mixing parameters at room temperature were determined for two pairs of transitions in the v2 fundamental band of H216O, for self...

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Bibliographic Details
Main Authors: Smith, M A H, Brown, L R, Toth, R A, Devi, V Malathy, Benner, D Chris
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:A multispectrum fitting algorithm has been used to identify line mixing and determine mixing parameters for infrared transitions of H2O and CH4 in the 5-9 mum region. Line mixing parameters at room temperature were determined for two pairs of transitions in the v2 fundamental band of H216O, for self-broadening and for broadening by H2, He, CO2, N2, O2 and air. Line mixing parameters have been determined from air-broadened CH4 spectra, recorded at temperatures between 210 K and 314 K, in selected R-branch manifolds of the v4 band. For both H2O and CH4, the inclusion of line mixing was seen to have a greater effect on the retrieved values of the line shifts than on the retrieved values of other parameters.
ISSN:0094-243X
DOI:10.1063/1.2402784