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- Title
Intercomparisons of δ<sup>13</sup>C and δD measurements of atmospheric CH<sub>4</sub> for combined use of datasets from different laboratories.
- Authors
Umezawa, Taku; Brenninkmeijer, Carl A. M.; Röckmann, Thomas; van der Veen, Carina; Tyler, Stanley C.; Fujita, Ryo; Morimoto, Shinji; Aoki, Shuji; Sowers, Todd; Schmitt, Jochen; Bock, Michael; Beck, Jonas; Fischer, Hubertus; Michel, Sylvia E.; Vaughn, Bruce H.; Miller, John B.; White, James W. C.; Brailsford, Gordon; Schaefer, Hinrich; Sperlich, Peter
- Abstract
We report results from intercomparison exercises between laboratories that conduct measurements of stable carbon and hydrogen isotope ratios of atmospheric CH4 (δ13C-CH4 and δD-CH4). The offsets between the laboratories are larger than the measurement reproducibility of individual laboratories. To disentangle plausible offsets between worldwide laboratories, we evaluated and critically assessed a large number of intercomparison results documented previously in the literature. The results indicate significant offsets of δ13C-CH4 and δD-CH4 measurements among datasets reported from different laboratories; the data spread over ranges of 0.5 ‰ for δ13C-CH4 and 13 ‰ for δD-CH4. The intercomparison results summarized in this study may be of help when combining isotope datasets from different laboratories in future studies.
- Subjects
ATMOSPHERIC chemistry; CARBON isotopes; HYDROGEN isotopes
- Publication
Atmospheric Measurement Techniques Discussions, 2017, p1
- ISSN
1867-8610
- Publication type
Article
- DOI
10.5194/amt-2017-281