Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Validation Testing of New Mechanisms with Outdoor Chamber Data. Volume 2: Analysis of VOC Data for the CB4 and CAL Photochemical Mechanisms.
Author Jeffries, H. E. ; Sexton, K. G. ; Arnold, J. R. ;
CORP Author North Carolina Univ. at Chapel Hill. School of Public Health.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Publisher Jan 89
Year Published 1989
Report Number EPA/600/3-89/010B;
Stock Number PB89-159040
Additional Subjects Air pollution control ; Photochemical reactions ; Reaction kinetics ; Smog ; Test chambers ; Exhaust emissions ; Urban areas ; Automobiles ; Hydrocarbons ; Tables(Data) ; Sampling ; Concentration(Composition) ; Comparison ; Information systems ; State government ; Carbon ; Ozone ; Sites ; Volatile organic compounds ; Carbon Bond Four Mechanism ; Carter-Atkinson-Lurmann Mechanism ; Air pollution sampling
Library Call Number Additional Info Location Last
NTIS  PB89-159040 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/08/1989
Collation 103p
Ambient hydrocarbon data were analyzed to derive hydrocarbon speciation for use with the Carbon Bond Four (CB4) and the Carter, Atkinson, Lurmann (CAL) mechanisms. A total of 66 city-years of detailed surface-layer hydrocarbon data (comprising 773 individual analyses) was available. A total of 56 hydrocarbon samples collected aloft was also added to the data base. These data were speciated into the carbon fractions for hydrocarbon species in the CB4 and CAL mechanisms. Fractions for each mechanism are reported for each city-year, for five clusters of city years with similar internal composition, and for the total. The five clusters were determined using two forms of cluster analysis. Multiple regression was also used to confirm the overall average carbon fractions. Four analyses of automobile exhaust from the UNC autoexhaust smog chamber study were also speciated. Recommendations for the default carbon fractions for OZIPM4 are given. Selected simulations for both mechanisms are used to demonstrate the effects of HC composition on ozone predictions.