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Estimating methane emissions from biological and fossil-fuel sources in the San Francisco Bay Area
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2017
Source: Geophysical Research Letters, 44(1), 486-495.
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Journal Title:Geophysical Research Letters
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NOAA Program & Office:
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Description:We present the first sector-specific analysis of methane (CH4) emissions from the San Francisco Bay Area (SFBA) using CH4 and volatile organic compound (VOC) measurements from six sites during September - December 2015. We apply a hierarchical Bayesian inversion to separate the biological from fossil-fuel (natural gas and petroleum) sources using the measurements of CH4 and selected VOCs, a source-specific 1km CH4 emission model, and an atmospheric transport model. We estimate that SFBA CH4 emissions are 166-289GgCH(4)/yr (at 95% confidence), 1.3-2.3 times higher than a recent inventory with much of the underestimation from landfill. Including the VOCs, 8227% of total posterior median CH4 emissions are biological and 173% fossil fuel, where landfill and natural gas dominate the biological and fossil-fuel CH4 of prior emissions, respectively.
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Source:Geophysical Research Letters, 44(1), 486-495.
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Rights Information:Other
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Compliance:Submitted
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