Agnés Perrin L aboratoire I nteruniversitaire des S ystémes A tmosphériques (LISA), CNRS, Université Paris XII, Créteil [email protected]C.Bray, D.Jacquemart, N. Lacome Laboratoire de Dynamique, Interactions et Réactivité (LADIR) , Université Pierre et Marie Curie-Paris 6, France Update of methyl Chloride in the 3 µm region
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Agnés Perrin Laboratoire Interuniversitaire des Systémes Atmosphériques (LISA), CNRS, Université Paris XII, Créteil [email protected] C.Bray,
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Agnés Perrin Laboratoire Interuniversitaire des Systémes Atmosphériques (LISA),
C.Bray, D.Jacquemart, N. LacomeLaboratoire de Dynamique, Interactions et Réactivité (LADIR) ,
Université Pierre et Marie Curie-Paris 6, France
Update of methyl Chloride in the 3 µm region
Importance of CH3Cl
• Methyl chloride (CH3Cl) is the most abundant, natural, chlorine-containing gas in the atmosphere, with natural sources like oceans and biomass burning as major identified sources.
Global methyl chloride (CH3Cl) measurements at 3µm
• Recently solar occultation measurements performed at 3 µm by the ACE-FTS experiment on the SCISAT-1 satellite were used to get the first global distribution of methyl chloride in the upper troposphere and stratosphere.
• However it was mentioned that the methyl chloride line parameters are of very low quality at 3 µm in both the HITRAN or GEISA databases
• At 3 µm interferences exist between lines from Methyl chloride and Ethane (C2H6) (G.C.Toon)
Infrared region for CH3Cl (image from the PNNL laboratory) and recent update in
HITRAN
Infrared region for CH3Cl (image from the PNNL laboratory) and recent update in
HITRAN
A.Nikitin, J.P.Champion, and H. Bürger, J. Mol. Spectrosc. 230 , 174 (2005)A.Nikitin J.Mol. Spect 252 , 17 (2008)A.Nikitin and J.P.Champion, J. Mol. Spect 230 , 168 (2005)A.Nikitin et al. J. Mol Spect 221, 199 (2003)
Recent update in the HITRAN database
A.Nikitin, J.P.Champion, and H. Bürger, J. Mol. Spectrosc. 230 , 174 (2005)A.Nikitin J.Mol. Spect 252 , 17 (2008)A.Nikitin and J.P.Champion, J. Mol. Spect 230 , 168 (2005)