Constraining remote oxidation capacity with ATom observations.

Journal

Atmospheric chemistry and physics
ISSN: 1680-7316
Titre abrégé: Atmos Chem Phys
Pays: Germany
ID NLM: 101214388

Informations de publication

Date de publication:
Jul 2020
Historique:
entrez: 10 3 2021
pubmed: 11 3 2021
medline: 11 3 2021
Statut: ppublish

Résumé

The global oxidation capacity, defined as the tropospheric mean concentration of the hydroxyl radical (OH), controls the lifetime of reactive trace gases in the atmosphere such as methane and carbon monoxide (CO). Models tend to underestimate the methane lifetime and CO concentrations throughout the troposphere, which is consistent with excessive OH. Approximately half of the oxidation of methane and non-methane volatile organic compounds (VOCs) is thought to occur over the oceans where oxidant chemistry has received little validation due to a lack of observational constraints. We use observations from the first two deployments of the NASA ATom aircraft campaign during July-August 2016 and January-February 2017 to evaluate the oxidation capacity over the remote oceans and its representation by the GEOS-Chem chemical transport model. The model successfully simulates the magnitude and vertical profile of remote OH within the measurement uncertainties. Comparisons against the drivers of OH production (water vapor, ozone, and NO

Identifiants

DOI: 10.5194/acp-20-7753-2020 PMID: 33688335 PMC: PMC7939060
pubmed: 33688335
doi: 10.5194/acp-20-7753-2020
pmc: PMC7939060
mid: NIHMS1669560
doi:

Types de publication

Journal Article

Langues

eng

Pagination

7753-7781

Subventions

Organisme : NASA
ID : NNX14AP89G
Pays : United States

Déclaration de conflit d'intérêts

Competing interests. The authors declare that they have no conflict of interest.

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Auteurs

Katherine R Travis (KR)

Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Colette L Heald (CL)

Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA.

Hannah M Allen (HM)

Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.

Eric C Apel (EC)

Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.

Stephen R Arnold (SR)

Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK.

Donald R Blake (DR)

Department of Chemistry, University of California Irvine, Irvine, CA, USA.

William H Brune (WH)

Department of Meteorology, Pennsylvania State University, University Park, PA, USA.

Xin Chen (X)

University of Minnesota, Department of Soil, Water and Climate, St. Paul, MN, USA.

Róisín Commane (R)

Dept. of Earth & Environmental Sciences of Lamont-Doherty Earth Observatory and Columbia University, Palisades, NY, USA.

John D Crounse (JD)

Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.

Bruce C Daube (BC)

Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.

Glenn S Diskin (GS)

NASA Langley Research Center, Hampton, VA, USA.

James W Elkins (JW)

Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.

Mathew J Evans (MJ)

Wolfson Atmospheric Chemistry Laboratories (WACL), Department of Chemistry, University of York, York, UK.
National Centre for Atmospheric Science (NCAS), University of York, York, UK.

Samuel R Hall (SR)

Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.

Eric J Hintsa (EJ)

Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.
Cooperative Institute for Research in Environmental Science, University of Colorado, CO, USA.

Rebecca S Hornbrook (RS)

Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.

Prasad S Kasibhatla (PS)

Nicholas School of the Environment, Duke University, Durham, NC, USA.

Michelle J Kim (MJ)

Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA.
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA.

Gan Luo (G)

Atmospheric Sciences Research Center, University of Albany, Albany, NY, USA.

Kathryn McKain (K)

Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.
Cooperative Institute for Research in Environmental Science, University of Colorado, CO, USA.

Dylan B Millet (DB)

University of Minnesota, Department of Soil, Water and Climate, St. Paul, MN, USA.

Fred L Moore (FL)

Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.
Cooperative Institute for Research in Environmental Science, University of Colorado, CO, USA.

Jeffrey Peischl (J)

Cooperative Institute for Research in Environmental Science, University of Colorado, CO, USA.
Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.

Thomas B Ryerson (TB)

Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, USA.

Tomás Sherwen (T)

Wolfson Atmospheric Chemistry Laboratories (WACL), Department of Chemistry, University of York, York, UK.
National Centre for Atmospheric Science (NCAS), University of York, York, UK.

Alexander B Thames (AB)

Department of Meteorology, Pennsylvania State University, University Park, PA, USA.

Kirk Ullmann (K)

Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.

Xuan Wang (X)

Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.
School of Energy and Environment, City University of Hong Kong, Hong Kong, China.

Paul O Wennberg (PO)

Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA.

Glenn M Wolfe (GM)

Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA.

Fangqun Yu (F)

Atmospheric Sciences Research Center, University of Albany, Albany, NY, USA.

Classifications MeSH