Articles | Volume 11, issue 1
https://doi.org/10.5194/essd-11-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-11-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Gridded maps of geological methane emissions and their isotopic signature
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Faculty of Environmental Science and Engineering, Babes Bolyai
University, Cluj-Napoca, Romania
Giancarlo Ciotoli
Istituto di Geologia Ambientale e Geoingegneria, CNR-IGAG, Rome,
Italy
Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Stefan Schwietzke
Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
NOAA Earth System
Research Laboratory, Global Monitoring Division, Boulder, Colorado, USA
now at: Environmental Defense Fund, Boulder, Colorado, USA
Martin Schoell
Gas-Consult Int., Pleasanton, California, USA
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Latest update: 23 Nov 2024
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.
We developed the first global maps of natural geological CH4 flux and isotopic values which can...
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