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Temperature dependences of air-broadening, air-narrowing and line-mixing coefficients of the methane ν3 R(6) manifold lines: application to in-situ measurements of atmospheric methane

In this work, we have revisited the spectroscopy of the R(6) manifold of the ν3 band of methane which is particularly suitable for in situ laser monitoring of CH4. For that purpose, a home-made Difference Frequency Generation (DFG) laser emitting at 3.24µm has been coupled to a cryogenically-cooled...

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Bibliographic Details
Main Authors: Ghysels-Dubois, Mélanie (Author) , Gomez, L. (Author) , Cousin, J. (Author) , Tran, H. (Author) , Amarouche, N. (Author) , Engel, A. (Author) , Levin, Ingeborg (Author) , Durry, G. (Author)
Format: Article (Journal)
Language:English
Published: 2014
In: Journal of quantitative spectroscopy & radiative transfer
Year: 2013, Volume: 133, Pages: 206-216
ISSN:1879-1352
DOI:10.1016/j.jqsrt.2013.08.003
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.jqsrt.2013.08.003
Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0022407313003221
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Author Notes:M. Ghysels, L. Gomez, J. Cousin, H. Tran, N. Amarouche, A. Engel, I. Levin, G. Durry
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Summary:In this work, we have revisited the spectroscopy of the R(6) manifold of the ν3 band of methane which is particularly suitable for in situ laser monitoring of CH4. For that purpose, a home-made Difference Frequency Generation (DFG) laser emitting at 3.24µm has been coupled to a cryogenically-cooled optical cell to investigate the temperature dependences of the air-broadening, the air-narrowing and the air-mixing coefficients of these ν3 R(6) manifold transitions. The temperatures of the measurements range from 213.5K to room temperature. These are typically the temperatures found in the troposphere and the lower stratosphere. Finally, the measured spectroscopic parameters have been used to process the in-situ methane absorption spectra recorded by a balloon-borne laser diode spectrometer.
Item Description:Available online 13 August 2013
Gesehen am 02.10.2020
Physical Description:Online Resource
ISSN:1879-1352
DOI:10.1016/j.jqsrt.2013.08.003

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