HR: 1340h
AN: A53C-1363    [Abstracts]
TI: Four Summers of Ozone Profiles Over Beltsville, MD: A Study of Free-Tropospheric and Boundary Layer Ozone
AU: * Yorks, J E
EM: jey130@psu.edu
AF: Department of Meteorology, Penn State University, 503 Walker Building, University Park, PA 16801,
AU: Thompson, A M
EM: anne@meteo.psu.edu
AF: Department of Meteorology, Penn State University, 503 Walker Building, University Park, PA 16801,
AU: Ryan, W F
EM: wfryan@meteo.psu.edu
AF: Department of Meteorology, Penn State University, 503 Walker Building, University Park, PA 16801,
AU: Taubman, B F
EM: taubmanbf@appstate.edu
AF: Department of Chemistry, Appalachian State University, 417 CAP Building 525 Rivers Street, Boone, NC 28608-2036,
AU: Joseph, E
EM: ejosgm@gmail.com
AF: Department of Physics, Howard University, 2355 Sixth Street, NW, Washington, DC 20059,
AU: Voemel, H
EM: Holger.Voemel@colorado.edu
AF: University of Colorado CIRES and NOAA/GMD, 216 UCB, Boulder, CO 80309-0216,
AU: Bojkov, B
EM: Bojan.R.Bojkov@nasa.gov
AF: University of Maryland Baltimore County/Goddard Earth Science and Technology Center, NASA/GSFC, 5523 Research Park Drive, Suite 320, Baltimore, MD 21228,
AU: McQueen, J
EM: Jeff.Mcqueen@noaa.gov>
AF: NWS/NCEP Environmental Modeling Center, 5200 Auth Road, Camp Springs, MD 20746- 4304,
AB: A total of over 75 ozonesonde launches were made in Beltsville, MD during the summers of 2004 through 2007 as part of 4 different field campaigns; INTEX Ozonesonde Network Study 2004 (IONS-04, http://croc.gsfc.nasa.gov/intex/ions.html), Howard/NCAS ozonesondes for MDE (Maryland Department of the Environment) Pollution Episodes (http://www.physics1.howard.edu), and the Water Vapor Validation Experiment – Satellite/Sondes 2006 & 2007 (WAVES, http://ecotronics.com/lidar-misc/WAVES.htm). These profiles were used to characterize variability in sources of tropospheric ozone. On average, free-tropospheric ozone was composed of the following: 10% regional convection and lightning-derived NO, 25% stratospheric ozone, with the balance (~65%) a mixture of aged air of indeterminate origin and recently advected ozone. A separate analysis of local emission and boundary layer ozone was performed. The data from 2005 and 2006 includes both nighttime and daytime launches, permitting an investigation between planetary boundary layer processes and surface ozone. In nighttime profiles with above average column ozone in the residual layer, daily maximum 1 hr and 8 hr average surface ozone values were roughly 10 to 15 ppbv greater than days with below average column ozone in the residual layer. These results, as well as vertical profiles, were compared to the NOAA/EPA Operational Air Quality Model forecasts for Beltsville. The model showed a highly negative bias for maximum 1 hr ozone values, but only a slightly negative bias for maximum 8 hr ozone values on days with above average residual layer ozone.
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 3307 Boundary layer processes
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting