OLS : Record


Main Title Status of Research to Develop Acidic Dry Deposition Monitoring Capability.
Author Durham, Jack L.; Hicks, Bruce B.; Wesely, Marvin L.; de Pena, Rosa G.; Thomson, Dennis R.;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/D-83-093;
Stock Number PB83-247437
Subjects Acidification; Air pollution; pH; Sampling; Particles; Gases; Sulfates; Nitrates; Ammonium; Sulfur dioxide; Nitrogen dioxide; Ozone; Dry deposition; Acid rain; Ecosystems
Library   Call Number Additional Info Location Date Modified
NTIS PB83-247437 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 12p
Abstract Dry deposition is thought to be as important as wet deposition in acidifying ecosystems. However, at present acidic dry deposition of relevant particles and gases cannot be monitored directly in a quantitative manner. The U.S. EPA Workshop on Dry Deposition (Report No. EPA-600/9-80-050) recommended that dry deposition velocities be parameterized as a function of micrometeorology and surface type to permit the use of ambient pollutant concentration data for inferring dry flux ('concentration monitoring' technique). Also, the micrometeorological technique's variance, modified-Bowen ratio, and eddy accumulation were identified as candidates for development as dry flux monitors for network stations. This approach has been adopted by the task group on 'Deposition Monitoring of Acidic Substances' of the Interagency Task Force on Acid Precipitation. Research monitoring stations have been established at Oak Ridge, TN, Argonne, IL, and University Park, PA for the purpose of intercomparing 'concentration monitoring', the three previously identified micrometeorological techniques, and eddy correlation. Intercomparison tests are being performed for SO2, NO2, HNO3, NH3, O3, and particulate SO4(-2), NO3(-1), and NH4(+1). The status of methods development and performance is presented.
PUB Date Free Form Aug 83
Category Codes 13B; 68A
NTIS Prices PC A02/MF A01
Primary Description 600/09
Document Type NT
Control Number 332924769
Cataloging Source NTIS/MT
Origin NTIS
Type CAT