| Main Title |
Assessment of vertical distributions of photochemical pollutants and meteorological variables in the vicinity of urban areas |
| Author |
Ludwig, F. L.
|
| Other Authors |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
xxi, 165 p. : ill., maps ; 28 cm. |
| Abstract |
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. |
| Notes |
Project Officer: E.L. Martinez. "August 1979." "EPA-450/4-79-017." "SRI Project 6869." SRI International |
