Articles | Volume 9, issue 3
Atmos. Meas. Tech., 9, 1095–1111, 2016
https://doi.org/10.5194/amt-9-1095-2016
Atmos. Meas. Tech., 9, 1095–1111, 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 et al.

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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.