The carbon isotopic composition of atmospheric methane
Open Access
- 20 June 1982
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research: Oceans
- Vol. 87 (C7) , 4879-4882
- https://doi.org/10.1029/jc087ic07p04879
Abstract
Recent measurements of the carbon isotopic abundance of atmospheric methane give a value of δ(13C/12C) = −47.0 ± 0.3‰, which is significantly different from earlier values measured by others between 1950 and 1970. The isotopic composition of various sources and the possibility of a temporal trend are discussed. The average methane concentration measured was 1.66 ppm, which is in accord with the increase in concentration since 1965–1970 observed in other studies.Keywords
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