Articles | Volume 11, issue 1
https://doi.org/10.5194/essd-11-1-2019
https://doi.org/10.5194/essd-11-1-2019
Peer-reviewed comment
 | 
07 Jan 2019
Peer-reviewed comment |  | 07 Jan 2019

Gridded maps of geological methane emissions and their isotopic signature

Giuseppe Etiope, Giancarlo Ciotoli, Stefan Schwietzke, and Martin Schoell

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Cited articles

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Short summary
We developed the first global maps of natural geological CH4 flux and isotopic values which can be used for new atmospheric CH4 modelling. The maps, based on updated, measured and theoretically estimated data, show that the highest geo-CH4 emissions are located in the Northern Hemisphere (N. America, Caspian region, Europe, Siberian Arctic Shelf), and that geo-CH4 is less 13C-enriched than what has been assumed so far in other studies. Other CH4 sources can now be estimated with higher accuracy.