Record Display for the EPA National Library Catalog

RECORD NUMBER: 6 OF 24

OLS Field Name OLS Field Data
Main Title Comparison of Several Techniques for Determining Dry Deposition Flux.
Author Sickles, II, J. E. ; Bach, W. D. ; Spiller, L. L. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/D-83-057;
Stock Number PB83-219659
Additional Subjects Deposition ; Air pollution ; Flux(Rate) ; Inorganic nitrates ; Sulfates ; Sampling ; Meteorology ; Comparison ; Leaves ; Dry method ; Dry deposition ; Acid rain
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB83-219659 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 30p
Abstract
Over the period from 1/22/81 through 5/4/82, measurements were conducted to permit comparison of several techniques for determining dry deposition flux of nitrates and sulfates. Direct flux estimates were made by using actual leaf surfaces and foliar wash and by exposing and washing three surrogate surfaces: bucket, petri dish, and cellulose filter. Indirect flux estimates were made using SSI high volume sampling along with meteorological measurements. The time scale for the direct methods was nominally one month. The indirect method used 24-hour particulate sampling and three-hour meteorological observations to calculate average flux values for the exposure periods of the direct methods. This permitted comparison of direct and indirect methods on a similar time scale.