Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Evaluation of Ozone Exposure Indices in Exposure-Response Modeling (Journal Version).
Author Lee, E. H. ; Tingey, D. T. ; Hogsett, W. E. ;
CORP Author Northrop Services, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Publisher c1988
Year Published 1988
Report Number EPA-68-03-3246; EPA/600/J-88/244;
Stock Number PB89-145049
Additional Subjects Ozone ; Plant growth ; Mathematical models ; Tables(Data) ; Oxygen ; Yield ; Soybean plants ; Wheat plants ; Cotton plants ; Corn ; Grain sorghum plants ; Statistical analysis ; Exposure ; Indexes(Ratios) ; Reprints ; Dose-response relationships ; Air pollution effects(Plants)
Library Call Number Additional Info Location Last
NTIS  PB89-145049 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/08/1989
Collation 13p
In exposure-response modeling, a major concern is the numerical definition of exposure in relating crop loss to O3, yet few indices have been considered. The paper addresses research in which plant growth was regressed for soybean, wheat, cotton, corn, and sorghum against 613 numerical exposure indices using the Box-Tidwell model. The top-performing generalized, phenologically weighted, cumulative impact indices accumulated concentrations emphasizing O3 concentrations of 0.06 ppm (118 micrograms/cu m) or higher, and had phenological weighting schemes with greatest weight occurring 20 to 40 days prior to crop maturity. These findings indicate that (1) peak concentrations are important, but lower concentrations should be included in the calculations, (2) increased plant sensitivity occurs between flowering and maturity, and (3) plants respond to cumulative exposure impact. (Copyright (c) Elsevier Science Publishers B.V.)