Why do models overestimate surface ozone in the Southeast United States?

Abstract. Ozone pollution in the Southeast US involves complex chemistry driven by emissions of anthropogenic nitrogen oxide radicals (NOx ≡ NO + NO2) and biogenic isoprene. Model estimates of surface ozone concentrations tend to be biased high in the region and this is of concern for designing effective emission control strategies to meet air quality standards. We use detailed chemical observations from the SEAC4RS aircraft campaign in August and September 2013, interpreted with the GEOS-Chem chemical transport model at 0.25° × 0.3125° horizontal resolution, to better understand the factors controlling surface ozone in the Southeast US. We find that the National Emission Inventory (NEI) for NOx from the US…

• NA
  National Aeronautics and Space Administration
• UE
  U.S. Environmental Protection Agency

  Award: 91761601-0
• AG
  Australian Government
• AN
  Australian National University
• UO
  University of Wollongong
• NE
  National Ethnic Affairs Commission of the People's Republic of China
• NO
  National Oceanic and Atmospheric Administration
• NC
  National Center For Environmental Assessment

  Award: 91761601-0
• ES
  Earth Sciences Division
• NE
  National Eye Institute
• NC
  National Cancer Institute