Record Display for the EPA National Library Catalog


Main Title Use of Scavenging Ratios for the Inference of Surface-Level Concentrations and Subsequent Dry Deposition of Ca(2+), Mg(2+), Na(1+), and K(1+).
Author Eder, B. K. ; Dennis, R. L. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/461;
Stock Number PB91-183285
Additional Subjects Aerosols ; Air pollution ; Deposition ; Dry methods ; Ecosystems ; Air water interactions ; Land pollution ; Concentration(Composition) ; Water pollution ; Wet methods ; Calcium ions ; Magnesium ions ; Potassium ions ; Sodium ions ; Alkalinity ; Comparison ; North America ; Precipitation(Meteorology) ; Path of pollutants ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-183285 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22p
The importance of the dry deposition of aerosols as a pathway for the transfer of alkaline material to ecosystems is discussed, as is the difficulty investigators face when trying to measure such deposition. Accordingly, an inference technique is developed which allows for the estimation of the annual and monthly dry deposition of Ca(2+), Mg(2+), Na(+) and K(+), based upon the linear relationship exhibited between the measured surface concentrations and wet deposition at 23 stations in Ontario, Canada for the period 1983-1985. Theoretically, this inference technique is based upon the premise that precipitation efficiently scavenges the aerosols, resulting in a strong correlation between concentrations within precipitation and the surface air concentrations. Because of the stochastic nature of such an approach, care must be taken to ensure that the assumptions inherent to precipitation scavenging and therefore this inference technique are carefully considered. Under such considerations, annual and monthly dry deposition of the alkaline aerosols can be estimated at many locations across North America where wet deposition measurements are routinely made. (Copyright (c) 1990 Kluwer Academic Publishers.)