Articles | Volume 18, issue 13
Atmos. Chem. Phys., 18, 9831–9843, 2018
https://doi.org/10.5194/acp-18-9831-2018

Special issue: The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

Atmos. Chem. Phys., 18, 9831–9843, 2018
https://doi.org/10.5194/acp-18-9831-2018

Research article 12 Jul 2018

Research article | 12 Jul 2018

A very limited role of tropospheric chlorine as a sink of the greenhouse gas methane

Sergey Gromov et al.

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Short summary
Using the observational data on 13C (CO) and 13C (CH4) from the extra-tropical Southern Hemisphere (ETSH) and EMAC model we (1) provide an independent, observation-based evaluation of Cl atom concentration variations in the ETSH throughout 1994–2000, (2) show that the role of tropospheric Cl as a sink of CH4 is seriously overestimated in the literature, (3) demonstrate that the 13C/12C ratio of CO is a sensitive indicator for the isotopic composition of reacted CH4 and therefore for its sources.
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