Articles | Volume 11, issue 2
Atmos. Meas. Tech., 11, 1207–1231, 2018
https://doi.org/10.5194/amt-11-1207-2018
Atmos. Meas. Tech., 11, 1207–1231, 2018
https://doi.org/10.5194/amt-11-1207-2018
Research article
02 Mar 2018
Research article | 02 Mar 2018

Interlaboratory comparison of δ13C and δD measurements of atmospheric CH4 for combined use of data sets from different laboratories

Taku Umezawa et al.

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Short summary
Isotope measurements are useful for separating different methane sources. However, the lack of widely accepted standards and calibration methods for stable carbon and hydrogen isotopic ratios of methane in air has caused significant measurement offsets among laboratories. We conducted worldwide interlaboratory comparisons, surveyed the literature and assessed them systematically. This study may be of help in future attempts to harmonize data sets of isotopic composition of atmospheric methane.