Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Analysis of Regional Visibility in the Southwest Using Principal Component and Back Trajectory Techniques.
Author Pitchford, M. ; Pitchford, A. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Year Published 1985
Report Number EPA/600/J-85/225;
Stock Number PB86-118460
Additional Subjects Air pollution ; Visibility ; Utah ; Colorado ; Arizona ; New Mexico ; Factor analysis ; Reprints ; Southwest Region(United States) ; Principal components analysis ; Extinction coefficients
Library Call Number Additional Info Location Last
NTIS  PB86-118460 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 18p
Approximately 3 years of visibility data from a 13-station teleradiometer network in the southwest desert is the basis for the analysis presented. Principal component analysis is employed to identify regions of similarly varying visibility for the entire data set and by seasons. 'North', 'Center', and 'South' regions are identified in each of the four seasons. These regions change their size, shape and location somewhat through the seasons and thus are referred to as groups with each group containing four seasonal regions. A method to calculate transport extinction budgets is demonstrated for the three visibility groups.