Articles | Volume 15, issue 21
Research article
30 Oct 2018
Research article |  | 30 Oct 2018

Limited impact of El Niño–Southern Oscillation on variability and growth rate of atmospheric methane

Hinrich Schaefer, Dan Smale, Sylvia E. Nichol, Tony M. Bromley, Gordon W. Brailsford, Ross J. Martin, Rowena Moss, Sylvia Englund Michel, and James W. C. White


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (24 Sep 2018) by Fortunat Joos
AR by Hinrich Schaefer on behalf of the Authors (27 Sep 2018)  Author's response    Manuscript
ED: Publish as is (08 Oct 2018) by Fortunat Joos
Short summary
To quantify the impact of El Nino–Southern Oscillation (ENSO) climate events on the methane budget, we studied the correlation between CH4 time series and ENSO indices. We find that ENSO explains less than one-third of the variability in CH4 levels and their stable carbon isotopes, which constrain the source processes of emissions. ENSO forcing of the CH4 cycle is too small, episodic, and regional to force atmospheric trends, which are more likely caused by agricultural or industrial emissions.
Final-revised paper