Record Display for the EPA National Library Catalog


Main Title Atmospheric Deposition of Toxic Metals to Lake Michigan: Preliminary Annual Model Calculations.
Author Clark, T. L. ;
CORP Author National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher 1992
Year Published 1992
Report Number EPA/600/A-92/239;
Stock Number PB93-120954
Additional Subjects Air water interactions ; Air pollution ; Water pollution ; Deposition ; Metals ; Mathematical models ; Lake Michigan ; Great Lakes ; Water quality ; Toxic substances ; Wet methods ; Dry methods ; Study estimates ; Particle size ; Regional Lagrangian Model of Air Pollution
Library Call Number Additional Info Location Last
NTIS  PB93-120954 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
Concern is growing for the environmental water quality of the Great Lakes. Atmospheric deposition of toxic substances is recognized as a major pathway of contaminants to the water medium. To estimate the annual atmospheric loadings of five toxic metals--arsenic (As), cadmium (Cd), chromium (Cr), lead (Pb), and nickel (Ni)--to Lake Michigan, the Regional Lagrangian Model of Air Pollution (RELMAP) was applied using a preliminary 1985 airborne toxics emissions inventory developed by EPA for U.S. and Canadian anthropogenic sources. At 3-h intervals the model creates pollutant puffs containing particles with diameters of either 0.5 micrometers or 5.0 micrometers, transports them across the eastern North American domain, and calculates wet and dry deposition amounts for each unit-degree cell. Total direct deposition amounts to the lake are determined from these calculated amounts and a land-use inventory that defines the water surface portion of each cell.