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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- Influence of permafrost thaw on an extreme geologic methane seep T. Sullivan et al. 10.1002/ppp.2114
- Gas Pressure Dynamics in Small and Mid-Size Lakes B. Boehrer et al. 10.3390/w13131824
- CH4 Fluxes Derived from Assimilation of TROPOMI XCH4 in CarbonTracker Europe-CH4: Evaluation of Seasonality and Spatial Distribution in the Northern High Latitudes A. Tsuruta et al. 10.3390/rs15061620
- Verifying Methane Inventories and Trends With Atmospheric Methane Data J. Worden et al. 10.1029/2023AV000871
- Measurement report: Assessment of Asian emissions of ethane and propane with a chemistry transport model based on observations from the island of Hateruma A. Adedeji et al. 10.5194/acp-23-9229-2023
- The 2019 methane budget and uncertainties at 1° resolution and each country through Bayesian integration Of GOSAT total column methane data and a priori inventory estimates J. Worden et al. 10.5194/acp-22-6811-2022
Latest update: 30 Sep 2023
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...