Heterogeneity and chemical reactivity of the remote troposphere defined by aircraft measurements – corrected

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dc.contributor.authorGuo, Hao
dc.contributor.authorFlynn, Clare M.
dc.contributor.authorPrather, Michael J.
dc.contributor.authorStrode, Sarah A.
dc.contributor.authorWolfe, Glenn
dc.contributor.authorClair, Jason St.
dc.contributor.authoret al
dc.date.accessioned2023-02-08T19:01:59Z
dc.date.available2023-02-08T19:01:59Z
dc.date.issued2023-01-04
dc.descriptionAuthors: - Hao Guo, Clare M. Flynn, Michael J. Prather, Sarah A. Strode, Stephen D. Steenrod, Louisa Emmons, Forrest Lacey, Jean-Francois Lamarque, Arlene M. Fiore, Gus Correa, Lee T. Murray, Glenn M. Wolfe, Jason M. St. Clair, Michelle Kim, John Crounse, Glenn Diskin, Joshua DiGangi, Bruce C. Daube, Roisin Commane, Kathryn McKain, Jeff Peischl, Thomas B. Ryerson, Chelsea Thompson, Thomas F. Hanisco, Donald Blake, Nicola J. Blake, Eric C. Apel, Rebecca S. Hornbrook, James W. Elkins, Eric J. Hintsa, Fred L. Moore, and Steven C. Wofsyen_US
dc.description.abstractThe NASA Atmospheric Tomography (ATom) mission built a photochemical climatology of air parcels based on in situ measurements with the NASA DC-8 aircraft along objectively planned profiling transects through the middle of the Pacific and Atlantic oceans. In this paper we present and analyze a data set of 10 s (2 km) merged and gap-filled observations of the key reactive species driving the chemical budgets of O₃ and CH₄ (O₃, CH₄, CO, H₂O, HCHO, H₂O₂, CH₃OOH, C₂H₆, higher alkanes, alkenes, aromatics, NOx, HNO₃, HNO4, peroxyacetyl nitrate, and other organic nitrates), consisting of 146 494 distinct air parcels from ATom deployments 1 through 4. Six models calculated the O₃ and CH₄ photochemical tendencies from this modeling data stream for ATom 1. We find that 80 %–90 % of the total reactivity lies in the top 50 % of the parcels and 25 %–35 % in the top 10 %, supporting previous model-only studies that tropospheric chemistry is driven by a fraction of all the air. Surprisingly, the probability densities of species and reactivities averaged on a model scale (100 km) differ only slightly from the 2 km ATom 10 s data, indicating that much of the heterogeneity in tropospheric chemistry can be captured with current global chemistry models. Comparing the ATom reactivities over the tropical oceans with climatological statistics from six global chemistry models, we find generally good agreement with the reactivity rates for O₃ and CH₄. Models distinctly underestimate O₃ production below 2 km relative to the mid-troposphere, and this can be traced to lower NOx levels than observed. Attaching photochemical reactivities to measurements of chemical species allows for a richer, yet more constrained-to-what-matters, set of metrics for model evaluation. This paper presents a corrected version of the paper published under the same authors and title (sans “corrected”) as https://doi.org/10.5194/acp-21-13729-2021.en_US
dc.description.sponsorshipThe Atmospheric Tomography Mission (ATom) was supported by the National Aeronautics and Space Administration's Earth System Science Pathfinder Venture-Class Science Investigations: Earth Venture Suborbital-2. Primary funding of the preparation of this paper at UC Irvine was through NASA (grant nos. NNX15AG57A and 80NSSC21K1454).en_US
dc.description.urihttps://acp.copernicus.org/articles/23/99/2023/en_US
dc.format.extent19 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2dpgd-eunh
dc.identifier.citationGuo, H., et al. "Heterogeneity and chemical reactivity of the remote troposphere defined by aircraft measurements – corrected" Atmos. Chem. Phys. 23 (04 Jan 2023): 99–117, https://doi.org/10.5194/acp-23-99-2023, 2023.en_US
dc.identifier.urihttps://doi.org/10.5194/acp-23-99-2023
dc.identifier.urihttp://hdl.handle.net/11603/26765
dc.language.isoen_USen_US
dc.publisherEGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
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.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleHeterogeneity and chemical reactivity of the remote troposphere defined by aircraft measurements – correcteden_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-6586-4043en_US
dcterms.creatorhttps://orcid.org/0000-0002-9367-5749en_US

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