Anthropogenic control over wintertime oxidation of atmospheric pollutants

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dc.contributor.authorHaskins, J.D.
dc.contributor.authorLopez‐Hilfiker, F. D.
dc.contributor.authorLee, B. H.
dc.contributor.authorShah, V.
dc.contributor.authorWolfe, G. M.
dc.contributor.authorDiGangi, J.
dc.contributor.authorFibiger, D.
dc.contributor.authorMcDuffie, E. E.
dc.contributor.authorVeres, P.
dc.contributor.authorSchroder, J. C.
dc.contributor.authorCampuzano‐Jost, P.
dc.contributor.authorDay, D. A.
dc.contributor.authorJimenez, J. L.
dc.contributor.authorWeinheimer, A.
dc.contributor.authorSparks, T.
dc.contributor.authorCohen, R. C.
dc.contributor.authorCampos, T.
dc.contributor.authorSullivan, A.
dc.contributor.authorGuo, H.
dc.contributor.authorWeber, R.
dc.contributor.authorDibb, J.
dc.contributor.authorGreen, J.
dc.contributor.authorFiddler, M.
dc.contributor.authorBililign, S.
dc.contributor.authorJaeglé, L.
dc.contributor.authorBrown, S. S.
dc.contributor.authorThornton, J. A.
dc.date.accessioned2020-02-06T16:49:00Z
dc.date.available2020-02-06T16:49:00Z
dc.date.issued2019-12-13
dc.description.abstractDuring winter in the midlatitudes, photochemical oxidation is significantly slower than in summer and the main radical oxidants driving formation of secondary pollutants, such as fine particulate matter and ozone, remain uncertain, owing to a lack of observations in this season. Using airborne observations, we quantify the contribution of various oxidants on a regional basis during winter, enabling improved chemical descriptions of wintertime air pollution transformations. We show that 25–60% of NOₓ is converted to N₂O₅ via multiphase reactions between gas‐phase nitrogen oxide reservoirs and aerosol particles, with ~93% reacting in the marine boundary layer to form >2.5 ppbv ClNO₂. This results in >70% of the oxidizing capacity of polluted air during winter being controlled by multiphase reactions and emissions of volatile organic compounds, such as HCHO, rather than reaction with OH. These findings highlight the control local anthropogenic emissions have on the oxidizing capacity of the polluted wintertime atmosphere.en_US
dc.description.sponsorshipThis work was supported by the National Science Foundation AGS 1360745 and AGS‐1822664 and NASA NNX15AT96G. The WINTER data are available online (http://data.eol.ucar. edu). The Framework of 0‐D Atmospheric modeling employed in this work can be found here (https:// sites.google.com/site/wolfegm/ models).en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL085498en_US
dc.format.extent10 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m29xia-vlxw
dc.identifier.citationHaskins, J.D.; Lopez‐Hilfiker, F. D.; Lee, B. H.; Shah, V.; Wolfe, G. M.; DiGangi, J.; Fibiger, D.; McDuffie, E. E.; Veres, P.; Schroder, J. C.; Campuzano‐Jost, P.; Day, D. A.; Jimenez, J. L.; Weinheimer, A.; Sparks, T.; Cohen, R. C.; Campos, T.; Sullivan, A.; Guo, H.; Weber, R.; Dibb, J.; Green, J.; Fiddler, M.; Bililign, S.; Jaeglé, L.; Brown, S. S.; Thornton, J. A.; Anthropogenic control over wintertime oxidation of atmospheric pollutants; Geophysical Research Letters Volume46, Issue24, Pages 14826-14835 (2019); https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL085498en_US
dc.identifier.urihttps://doi.org/10.1029/2019GL085498
dc.identifier.urihttp://hdl.handle.net/11603/17224
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Physics Department
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsAccess to this item will begin on 2020-06-13
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/
dc.titleAnthropogenic control over wintertime oxidation of atmospheric pollutantsen_US
dc.typeTexten_US

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