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OLS Field Name OLS Field Data
Main Title Evaluating simple oxidant prediction methods using complex photochemical models : cluster analysis applied to urban ozone characteristics {microform} /
Author Hillyer, Martin S.
CORP Author Systems Applications, Inc., San Rafael, CA.;Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards,
Year Published 1981
Report Number EPA/450/4-81/031E; SAI-81176; EPA-68-02-2870
Stock Number PB82-234212
Subjects Cluster analysis ; Atmospheric ozone--United States ; Air--Pollution--United States
Additional Subjects Air pollution ; Ozone ; Clustering ; Mathematical modeling ; Urban areas ; Nitrogen oxides ; Classification
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB82-234212 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 43 p. : ill., 1 map ; 28 cm.
Abstract This report describes efforts to classify cities observing ozone levels greater than 0.12 ppm into distinct subgroups. Cluster analysis, using such factors mixing height, wind speed, temperature, NMOC/NOx ratio and type of precursor sources, is used to identify subgroups of cities. Identification of a limited number of such subgroups could provide a means for more convincingly demonstrating the general applicability of complex photochemical models by conducting validation exercises in cities representative of each subgroup. The report indicates that the technique shows promise but, nevertheless, requires some further refinement before it can be used to identify most appropriate subgroups.
Notes "September 1981." "EPA-450/4-81-031e." "August 1981." Bibliography: p. R-1. Microform.
Place Published Research Triangle Park, NC :
Corporate Au Added Ent United States. Environmental Protection Agency. Office of Air Quality Planning and Standards.
PUB Date Free Form {1981}
NTIS Prices PC A03/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20011128163201
Language eng
Origin NTIS
OCLC Rec Leader 01408nam 2200313Ka 45020