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dc.contributor.authorDuren, Riley M
dc.contributor.authorThorpe, Andrew K
dc.contributor.authorFoster, Kelsey T
dc.contributor.authorRafiq, Talha
dc.contributor.authorHopkins, Francesca M
dc.contributor.authorYadav, Vineet
dc.contributor.authorBue, Brian D
dc.contributor.authorThompson, David R
dc.contributor.authorConley, Stephen
dc.contributor.authorColombi, Nadia K
dc.contributor.authorFrankenberg, Christian
dc.contributor.authorMcCubbin, Ian B
dc.contributor.authorEastwood, Michael L
dc.contributor.authorFalk, Matthias
dc.contributor.authorHerner, Jorn D
dc.contributor.authorCroes, Bart E
dc.contributor.authorGreen, Robert O
dc.contributor.authorMiller, Charles E
dc.date.accessioned2019-12-06T19:25:55Z
dc.date.available2019-12-06T19:25:55Z
dc.date.issued2019-11-07
dc.identifier.citationDuren, R.M., Thorpe, A.K., Foster, K.T. et al. California’s methane super-emitters. Nature 575, 180–184 (2019) doi:10.1038/s41586-019-1720-3en_US
dc.identifier.issn0028-0836
dc.identifier.pmid31695210
dc.identifier.doi10.1038/s41586-019-1720-3
dc.identifier.urihttp://hdl.handle.net/10150/636315
dc.description.abstractMethane is a powerful greenhouse gas and is targeted for emissions mitigation by the US state of California and other jurisdictions worldwide1,2. Unique opportunities for mitigation are presented by point-source emitters-surface features or infrastructure components that are typically less than 10 metres in diameter and emit plumes of highly concentrated methane3. However, data on point-source emissions are sparse and typically lack sufficient spatial and temporal resolution to guide their mitigation and to accurately assess their magnitude4. Here we survey more than 272,000 infrastructure elements in California using an airborne imaging spectrometer that can rapidly map methane plumes5-7. We conduct five campaigns over several months from 2016 to 2018, spanning the oil and gas, manure-management and waste-management sectors, resulting in the detection, geolocation and quantification of emissions from 564 strong methane point sources. Our remote sensing approach enables the rapid and repeated assessment of large areas at high spatial resolution for a poorly characterized population of methane emitters that often appear intermittently and stochastically. We estimate net methane point-source emissions in California to be 0.618 teragrams per year (95 per cent confidence interval 0.523-0.725), equivalent to 34-46 per cent of the state's methane inventory8 for 2016. Methane 'super-emitter' activity occurs in every sector surveyed, with 10 per cent of point sources contributing roughly 60 per cent of point-source emissions-consistent with a study of the US Four Corners region that had a different sectoral mix9. The largest methane emitters in California are a subset of landfills, which exhibit persistent anomalous activity. Methane point-source emissions in California are dominated by landfills (41 per cent), followed by dairies (26 per cent) and the oil and gas sector (26 per cent). Our data have enabled the identification of the 0.2 per cent of California's infrastructure that is responsible for these emissions. Sharing these data with collaborating infrastructure operators has led to the mitigation of anomalous methane-emission activity10.en_US
dc.description.sponsorshipCARB under ARB-NASA [15RD028, 82-19863]; CEC [CEC-500-15-004]; CARB; NASA's Carbon Monitoring System (CMS) Prototype Methane Monitoring System for California; Advancing Collaborative Connections for Earth System Science (ACCESS) Methane Source Finder project; NASANational Aeronautics & Space Administration (NASA) [NNN12AA01C]en_US
dc.language.isoenen_US
dc.publisherNATURE PUBLISHING GROUPen_US
dc.rights© The Author(s), under exclusive licence to Springer Nature Limited 2019en_US
dc.titleCalifornia's methane super-emittersen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizonaen_US
dc.identifier.journalNATUREen_US
dc.description.note6 month embargo; published online: 6 November 2019en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleNature


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