Record Display for the EPA National Library Catalog

RECORD NUMBER: 605 OF 1455

Main Title Model Assessment of the Annual Atmospheric Deposition of Trace Metals to Lake Superior.
Author Clark, T. L. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Oceanic and Atmospheric Administration, Silver Spring, MD. Atmospheric Sciences Modeling Div.
Publisher 1993
Year Published 1993
Report Number EPA/600/A-93/238;
Stock Number PB94-113008
Additional Subjects Water pollution ; Deposition ; Air water interactions ; Lake Superior ; Metals ; Mathematical models ; Air pollution ; Natural emissions ; Regional analysis ; Environmental transport ; Assessments ; Pollution sources ; Mass balance ; Toxic substances ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB94-113008 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Abstract
Mass balance studies indicate atmospheric deposition of toxic pollutants to the Great Lakes accounts for a significant portion of the total loading. Identifying the types and locations of both natural and anthropogenic sources of these loadings is imperative before effective and efficient emission control strategies are developed. A regional atmospheric dispersion model, in tandem with an anthropogenic toxics emission inventory, was applied to calculate the atmospheric deposition of five trace metals to Lake Superior for the entire year of 1989. Although there are significant uncertainties in the emission estimates, the model results illustrate three significant points. First, less than 1% of the trace metal mass emitted from sources within the modeling domain are deposited to Lake Superior. Second, long-range transport of trace metals to Lake Superior is significant, especially for cadmium, chromium, and nickel. Finally, both the significance of long-range transport and total annual atmospheric deposition to the Lake increase for the smaller 0.5 micrometer particle size.