Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Assessment of vertical distributions of photochemical pollutants and meteorological variables in the vicinity of urban areas
Author Ludwig, F. L.
Other Authors
Author Title of a Work
Martinez, E.L.
Ludwig, F. L.
CORP Author SRI International, Menlo Park, CA.;Environmental Protection Agency, Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Office of Air, Noise and Radiation, Office of Air Quality Planning and Standards,
Year Published 1979
Report Number EPA-450/4-79-017; EPA-68-02-2662
Stock Number PB80-139918
OCLC Number 53147414
Additional Subjects Air pollution ; Urban areas ; Metropolitan areas ; Oxidizers ; Ozone ; Nitrogen oxides ; Concentration(Composition) ; Aerosols ; Hydrocarbons ; Photochemical oxidants
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-450/4-79-017 c. 1 Research Triangle Park Library/RTP, NC 07/11/2019
EKBD  EPA-450/4-79-017 c. 2 Research Triangle Park Library/RTP, NC 07/11/2019
NTIS  PB80-139918 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation xxi, 165 p. : ill., maps ; 28 cm.
A system for classifying vertical profiles of ozone and other photochemical pollutants has been derived by analyzing 268 ozone profiles obtained from published reports and EPA data files. The profiles fall into six different categories that are related to the relative importance of the following factors: destruction of ozone near the surface, vertical mixing, and photochemical production. The report presents and discusses 108 representative examples of the vertical profiles, most with corresponding temperature data and many with aerosol (nephelometer), NOx, or hydrocarbon data. Linear regression has been used to define the relation between ozone concentrations in the mixing layer and those aloft, for the different profile types. The locations relative to an urban area and the times when each profile type is most apt to occur are discussed in terms of the statistics of the data set and the physical processes involved.
Project Officer: E.L. Martinez. "August 1979." "EPA-450/4-79-017." "SRI Project 6869." SRI International