Record Display for the EPA National Library Catalog

RECORD NUMBER: 243 OF 1865

OLS Field Name OLS Field Data
Main Title Critique of Methods to Measure Dry Deposition; Concise Summary of Workshop.
Author Hicks, Bruce B. ; Wesely, Marvin L. ; Durham, Jack L. ;
CORP Author Argonne National Lab., IL.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-600/D-82-155;
Stock Number PB82-167198
Additional Subjects Air pollution ; Meetings ; Monitoring ; Transport properties ; Particles ; Dry deposition ; Path of pollutants
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB82-167198 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 26p
Abstract
At the Workshop on Dry Deposition Methodology, held December 4 and 5, 1979, at the Argonne National Laboratory in Argonne, Illinois, dry deposition measurement techniques were assessed for routine monitoring use. A majority opinion was reached that commonly-used techniques such as surrogate surfaces and collection vessels are not sufficiently accurate for use in networks, because the highly varied properties of the natural surfaces of interest cannot be simulated adequately. Further research was recommended on dry deposition parameters in order to estimate dry deposition rates, if possible, from measurements of atmospheric concentrations at a single height, together with observations of surface properties and micrometeorological parameters. The ability to perform such investigations in the field is critically dependent upon advances in chemical and physical capabilities to provide methods with standard relative errors of less than 1 percent for a single instrument on successive measurements, or with time responses of less than 1 second. These requirements are not being achieved for many pollutant species. At present, the most promising methods for monitoring are eddy accumulation, modified Bowen ratio, and variance. Regardless of the method employed, monitoring sites should be chosen that are representative of the surrounding areas in terms of surface properties, meteorological conditions, and pollutant characteristics.