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OLS Field Name OLS Field Data
Main Title Analysis of Particulate Matter Concentrations and Visibility in the Eastern United States.
Author Trijonis, J. ;
CORP Author Santa Fe Research Corp., NM.;Environmental Protection Agency, Research Triangle Park, NC. Monitoring and Data Analysis Div.
Year Published 1984
Report Number EPA-68-02-3578; EPA-450/4-84-008;
Stock Number PB84-223064
Additional Subjects Particles ; Visibility ; Humidity ; Air pollution ; Fines ; Concentration(Composition) ; Transport properties ; Aerosols ; Sites ; Sulfates ; Eastern Region(United States) ; Air pollution sampling
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB84-223064 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 137p
Abstract An analysis is conducted of EPA IP Network data for the eastern U.S. of particulate concentrations and airport data for visibility and relative humidity. Physically meaningful regression equations are used to determine light extinction (visibility degradation) as a function of aerosol concentrations and relative humidity. As expected from optical theory, the results indicate that fine particles (FP) are much more closely tied to visibility than inhalable particles (IP) or total suspended particles (TSP). Sulfate particles have a much greater extinction efficiency (per unit mass) than nonsulfate TSP and nonsulfate IP; fine sulfate particles also appear to have a somewhat greater extinction efficiency than fine nonsulfate particles. It is shown that airport visibility data are of good quality for analyzing the spatial/temporal extent of fine particle episodes in the East. Visibility maps provide important qualitative insights regarding the spatial extent, transport patterns, and origins of fine particle episodes.
PUB Date Free Form Aug 84
Category Codes 13B; 68A#
NTIS Prices PC A07/MF A01
Primary Description 200/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 430022156
Origin NTIS
Type CAT