The Crittenden County Ozone Study (CCOS)

William J. Parkhurst, Ralph J. Valente, Myra L. Valente, Menachem Luria, Mark Sather

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Memphis, Tennessee, like many large metropolitan areas, sometimes experiences elevated ozone (O3) concentrations during the summertime O3 season (March-October). As a consequence, Memphis-Shelby County, Tennessee, and Crittenden County, Arkansas, are not in compliance with the current national ambient air quality standard for O3. As part of a larger Crittenden County Ozone Study (CCOS), a series of 10 airborne air quality research flights were performed during July through September of 2005 to better characterize chemical and meteorological conditions prevailing during O 3 episodes and to help assess the relative contribution of various O3 precursor emission sources to downwind O3 production. Flights were conducted during eight days for which elevated O3 conditions were forecast. On each of these sampling days, morning (9-11 CDT) and afternoon (13-15 CDT) flights were conducted over the greater Memphis area. During all afternoon flights and some of the morning flights O3 concentrations of more than 100 ppb and occasionally above 120 ppb were observed. Supplemental SO2 and NOy measurements, surface air quality and wind data, air-mass back trajectories and operational parameters from the local power plant were used to establish likely sources of O 3 production.

Original languageEnglish
Title of host publicationProc. 14th International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA) World Congress 2007, 18th Clean Air Society of Australia and New Zealand (CASANZ) Conf.
StatePublished - 2007
EventProc. 14th International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA) World Congress 2007, 18th Clean Air Society of Australia and New Zealand (CASANZ) Conf. - Brisbane, QLD, Australia
Duration: 9 Sep 200713 Sep 2007

Publication series

NameProc. 14th International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA) World Congress 2007, 18th Clean Air Society of Australia and New Zealand (CASANZ) Conf.

Conference

ConferenceProc. 14th International Union of Air Pollution Prevention and Environmental Protection Associations (IUAPPA) World Congress 2007, 18th Clean Air Society of Australia and New Zealand (CASANZ) Conf.
Country/TerritoryAustralia
CityBrisbane, QLD
Period9/09/0713/09/07

Keywords

  • Aircraft sampling
  • Atmospheric chemistry
  • Field study
  • Ozone air pollution
  • Transport

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