Full Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Acidic Gases and Aerosols in the Eastern and Western United States.
Author Edgerton, E. ; Martin, B. E. ;
CORP Author Environmental Science and Engineering, Inc., Durham, NC.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher 1992
Year Published 1992
Report Number EPA-68-02-4451; EPA/600/A-92/275;
Stock Number PB93-131696
Additional Subjects Aerosols ; Gases ; Acidity ; Air pollution sampling ; Deposition ; Long term effects ; United States ; Concentration(Composition) ; Graphs(Charts) ; US EPA ; Data base management ; Sulfates ; Sulfur dioxide ; Nitric acid ; Eastern Region(United States) ; Western Region(United States) ; National Dry Deposition Network
Library Call Number Additional Info Location Last
NTIS  PB93-131696 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/12/1993
Collation 11p
Abstract The USEPA National Dry Deposition Network (NDDN) is designed to provide long-term estimates of acidic gas and aerosol concentrations, and associated fluxes, across the continental United States. Inspection of data collected since 1988 shows species-dependent variability in atmospheric concentrations from site to site, season to season and year to year. In general, gas and aerosol concentrations were much higher (factor of 2-10) at eastern sites than western sites. Data for 25 eastern sites operational from 1988 through 1991 suggest that SO4(-2) concentrations have been essentially constant. In contrast, SO2 and HNO3 appear to have decreased, on average, by about 20 percent and 15 percent, respectively. Examination of sub-regional concentration patterns shows marked variability in areas of complex terrain. Data from a ridgetop site and a nearby base elevation site in southwestern North Carolina show that reactive gas concentrations, but not aerosol concentrations, are 2-3 times higher at ridgetop than at base elevation. Elevational gradients thus need to be accounted for in analysis of large-scale concentration patterns.
Supplementary Notes Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Category Codes 68A; 91A
NTIS Prices PC A03/MF A01
Primary Description 600/09
Document Type NT
Cataloging Source NTIS/MT
Control Number 305026735
Origin NTIS
Type CAT