Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Haze Climate of the United States.
Author Husar, R. B. ; Patterson, D. E. ;
CORP Author Washington Univ., St. Louis, MO. Center for Air Pollution Impact and Trend Analysis.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1986
Report Number EPA-R-810351; EPA/600/3-86/071;
Stock Number PB87-141057
Additional Subjects Climate ; Haze ; United States ; Visibility ; History ; Measurement ; Weather stations ; Trends ; Fog ; Graphs(Charts) ; Meteorological charts ;
Library Call Number Additional Info Location Last
NTIS  PB87-141057 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 102p
The historical data base of visual range at 137 surface synoptic meteorological stations is examined. The original observations of visual range each noon are converted to light extinction coefficient, BEXT= 24/VISIBILITY, a measure of haziness. The bext is summarized for each calendar quarter from 1948 to 1963 as percentiles of the distribution function, namely the 25th, 50th (median), 75th and 90th percentile. Detailed examination of station by station behavior indicate that the median is often obscured by an upper threshold of visual range reported. The results consist of trend graphs, as well as seasonal contour maps for each decade of the time period.