Articles | Volume 22, issue 1
Atmos. Chem. Phys., 22, 395–418, 2022
https://doi.org/10.5194/acp-22-395-2022
Atmos. Chem. Phys., 22, 395–418, 2022
https://doi.org/10.5194/acp-22-395-2022
Research article
12 Jan 2022
Research article | 12 Jan 2022

Methane emissions in the United States, Canada, and Mexico: evaluation of national methane emission inventories and 2010–2017 sectoral trends by inverse analysis of in situ (GLOBALVIEWplus CH4 ObsPack) and satellite (GOSAT) atmospheric observations

Xiao Lu et al.

Data sets

Multi-laboratory compilation of atmospheric methane data for the period 1957–2017 Cooperative Global Atmospheric Data Integration Project https://doi.org/10.25925/20190108

University of Leicester GOSAT Proxy XCH4 v9.0 Robert Parker, Hartmut Boesch https://doi.org/10.5285/18ef8247f52a4cb6a14013f8235cc1eb

CMS: Global 0.5-deg Wetland Methane Emissions and Uncertainty (WetCHARTs v1.3.1) Carbon Monitoring System https://doi.org/10.3334/ORNLDAAC/1915

Model code and software

GEOS-Chem 12.5.0 The International GEOS-Chem User Community https://doi.org/10.5281/zenodo.3403111

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Short summary
We evaluate methane emissions and trends for 2010–2017 in the gridded national emission inventories for the United States, Canada, and Mexico by inversion of in situ and satellite methane observations. We find that anthropogenic methane emissions for all three countries are underestimated in the national inventories, largely driven by oil emissions. Anthropogenic methane emissions in the US peak in 2014, in contrast to the report of a steadily decreasing trend over 2010–2017 from the US EPA.
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