title: Ozone correlations between mid-tropospheric partial columns and the near-surface at two mid-atlantic sites during the DISCOVER-AQ campaign in July 2011.
abstract: The current network of ground-based monitors for ozone (O3) is limited due to the spatial heterogeneity of O3at the surface. Satellite measurements can provide a solution to this limitation, but the lack of sensitivity of satellites to O3within the boundary layer causes large uncertainties in satellite retrievals at the near-surface. The vertical variability of O3was investigated using ozonesondes collected as part of NASA'sDerivingInformation onSurface Conditions fromCOlumn andVERtically Resolved Observations Relevant toAirQuality (DISCOVER-AQ) campaign during July 2011 in the Baltimore, MD/Washington D.C. metropolitan area. A subset of the ozonesonde measurements was corrected for a known bias from the electrochemical solution strength using new procedures based on laboratory and field tests. A significant correlation of O3over the two sites with ozonesonde measurements (Edgewood and Beltsville, MD) was observed between the mid-troposphere (7-10 km) and the near-surface (1-3 km). A linear regression model based on the partial column amounts of O3within these subregions was developed to calculate the near-surface O3using mid-tropospheric satellite measurements from the Tropospheric Emission Spectrometer (TES) onboard the Aura spacecraft. The uncertainties of the calculated near-surface O3using TES mid-tropospheric satellite retrievals and a linear regression model were less than 20 %, which is less than that of the observed variability of O3at the surface in this region. These results utilize a region of the troposphere to which existing satellites are more sensitive compared to the boundary layer and can provide information of O3at the near-surface using existing satellite infrastructure and algorithms.
authors.affiliation: Department of Meteorology, Pennsylvania State University, 503 Walker Building, University Park, PA 16802 USA.
authors.forename: Douglas K
authors.initials: DK
authors.lastname: Martins
authors.affiliation: Department of Meteorology, Pennsylvania State University, 503 Walker Building, University Park, PA 16802 USA.
authors.forename: Ryan M
authors.initials: RM
authors.lastname: Stauffer
authors.affiliation: Department of Meteorology, Pennsylvania State University, 503 Walker Building, University Park, PA 16802 USA.
authors.forename: Anne M
authors.initials: AM
authors.lastname: Thompson
authors.affiliation: Department of Meteorology, Pennsylvania State University, 503 Walker Building, University Park, PA 16802 USA.
authors.forename: Hannah S
authors.initials: HS
authors.lastname: Halliday
authors.affiliation: Department of Meteorology, Pennsylvania State University, 503 Walker Building, University Park, PA 16802 USA.
authors.forename: Debra
authors.initials: D
authors.lastname: Kollonige
authors.affiliation: Department of Physics and Astronomy, Howard University, 2355 6th St. NW, Washington, DC 20059 USA.
authors.forename: Everette
authors.initials: E
authors.lastname: Joseph
authors.affiliation: National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307-3000 USA.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Weinheimer
keywords: DISCOVER-AQ; Ozone; Ozonesondes; Satellite; TES