Articles | Volume 9, issue 3
https://doi.org/10.5194/amt-9-1095-2016
https://doi.org/10.5194/amt-9-1095-2016
Research article
 | 
18 Mar 2016
Research article |  | 18 Mar 2016

Global stratospheric measurements of the isotopologues of methane from the Atmospheric Chemistry Experiment Fourier transform spectrometer

Eric M. Buzan, Chris A. Beale, Chris D. Boone, and Peter F. Bernath

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Short summary
This paper presents the first global data set of atmospheric concentrations of the isotopologues of methane as measured by ACE-FTS. Both CH3D and 13CH4 show enrichment at higher altitudes and some seasonal variation at the poles. After applying a constant correction factor to the CH3D data set, good agreement with existing balloon measurements is achieved. However, 13CH4 still shows a large amount of error. Improved lab measurements of CH4 would help reduce errors in the ACE-FTS data.