Anthropogenic emissions of methane in the United States

Miller, Scot M.; Wofsy, Steven C.; Michalak, A. M.; Kort, E. A.; Andrews, A. E.; Biraud, Sébastien; Dlugokencky, E. J.; Eluszkiewicz, J.; Fischer, M. L.; Janssens‐Maenhout, Greet; Miller, B. R.; Miller, J. B.; Montzka, S. A.; Nehrkorn, Thomas; Sweeney, Colm

doi:10.1073/pnas.1314392110

articleProceedings of the National Academy of SciencesNov 25, 2013BRONZE OA

Anthropogenic emissions of methane in the United States

SMScot M. Miller SCSteven C. Wofsy AMA. M. Michalak EAE. A. Kort AEA. E. Andrews

Planetary Science Institute · Harvard University · +11 more institutions

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Abstract

This study quantitatively estimates the spatial distribution of anthropogenic methane sources in the United States by combining comprehensive atmospheric methane observations, extensive spatial datasets, and a high-resolution atmospheric transport model. Results show that current inventories from the US Environmental Protection Agency (EPA) and the Emissions Database for Global Atmospheric Research underestimate methane emissions nationally by a factor of ∼1.5 and ∼1.7, respectively. Our study indicates that emissions due to ruminants and manure are up to twice the magnitude of existing inventories. In addition, the discrepancy in methane source estimates is particularly pronounced in the south-central United…

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Keywords

Greenhouse gas
Methane
Environmental science
Methane emissions
Fossil fuel
Fugitive emissions
Atmospheric methane
Agriculture

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