Inter‐Annual Variability in Atmospheric Transport Complicates Estimation of US Methane Emissions Trends

Feng, Leyang; Tavakkoli, Sakineh; Jordaan, Sarah M.; Andrews, A. E.; Benmergui, J. S.; Waugh, Darryn W.; Zhang, Mingyang; Gaeta, Dylan C.; Miller, Scot M.

doi:10.1029/2022gl100366

Geophysical Research Letters

2023

DOI: 10.1029/2022gl100366

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Inter‐Annual Variability in Atmospheric Transport Complicates Estimation of US Methane Emissions Trends

Leyang Feng

Sakineh Tavakkoli

Sarah M. Jordaan³

et al.

Abstract: The US is one of the largest anthropogenic emitters of methane, behind only China and India (Saunois et al., 2020). Numerous recent studies indicate that US methane emissions are 48%-76% higher than estimated by the EPA Inventory of US Greenhouse Gas Emissions and Sinks (GHGI) (

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Cited by 2 publications

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Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region

Sahu,

Ahn,

Loughner

et al. 2024

Atmospheric Environment

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Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region

Sahu,

Ahn,

Loughner

et al. 2024

Atmospheric Environment

View full text Add to dashboard Cite

California dominates U.S. emissions of the pesticide and potent greenhouse gas sulfuryl fluoride

Gaeta,

Mühle,

Vimont

et al. 2024

Commun Earth Environ

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Sulfuryl fluoride (SO2F2) is a synthetic pesticide and a potent greenhouse gas that is accumulating in the global atmosphere. Rising emissions are a concern since SO2F2 has a relatively long atmospheric lifetime and a high global warming potential. The U.S. is thought to contribute substantially to global SO2F2 emissions, but there is a paucity of information on how emissions of SO2F2 are distributed across the U.S., and there is currently no inventory of SO2F2 emissions for the U.S. or individual states. Here we provide an atmospheric measurement-based estimate of U.S. SO2F2 emissions using high-precision SO2F2 measurements from the NOAA Global Greenhouse Gas Reference Network (GGGRN) and a geostatistical inverse model. We find that California has the largest SO2F2 emissions among all U.S. states, with the highest emissions from southern coastal California (Los Angeles, Orange, and San Diego counties). Outside of California, only very small and infrequent SO2F2 emissions are detected by our analysis of GGGRN data. We find that California emits 60-85% of U.S. SO2F2 emissions, at a rate of 0.26 ( ± 0.10) Gg yr−1. We estimate that emissions of SO2F2 from California are equal to 5.5–12% of global SO2F2 emissions.

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Inter‐Annual Variability in Atmospheric Transport Complicates Estimation of US Methane Emissions Trends

Abstract: The US is one of the largest anthropogenic emitters of methane, behind only China and India (Saunois et al., 2020). Numerous recent studies indicate that US methane emissions are 48%-76% higher than estimated by the EPA Inventory of US Greenhouse Gas Emissions and Sinks (GHGI) (

Cited by 2 publications

References 59 publications

Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region

Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region

California dominates U.S. emissions of the pesticide and potent greenhouse gas sulfuryl fluoride

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