Comparison of precipitation chemistry data at a central Illinois site in 1954 and in 1977

In 1954 detailed precipitation chemistry measurements on samples from a manually operated wet-only collector provided data for the concentrations of the major ions for precipitation events. A comparison with data for the same location for 1977, collected with an automatic wet-only collector, showed that the median sulfate and nitrate concentrations were somewhat larger than in 1954 while the median calcium plus magnesium concentration was much lower. The precipitation event median pH was also much lower in 1977. Possible explanations for the present lower calcium plus magnesium concentrations and the correspondingly lower pH values are given.U. S. Department of Energy, Contract EY-1199Ope

Atmospheric Dispersion Study of Deicing Salt Applied to Roads: Part 2, Final Report for Period July 2002 to June 2004

This report describes results from a project to characterize the atmospheric emission and deposition of deicing road salt composed mainly of sodium chloride (NaCl). The focus of the effort has been to determine the airborne concentrations and deposition of roadsalt aerosol due to the proposed construction of a roadway, FAP 340, which would join Interstate 55 (I-55) and Interstate 80 (I-80) southwest of Chicago. Five monitoring sites were established to characterize the road salt deposition. The report gives an overview of the sampling sites, presents data from the different instruments deployed at the sampling sites, and describes a model developed for the study to simulate salt deposition. The roadsalt model is the combination of an emissions model and a deposition model. The deposition parameterization is based on measurements following several snow events of salt collected in snow samples at different distances along I-55, which show the salt deposition to essentially vary inversely with the distance from the roadway.Ope

Study of Atmospheric Pollution Scavenging: Sixteenth Progress Report

published or submitted for publicationis peer reviewedOpe

Great Lakes Atmospheric Deposition (GLAD) Network, 1982 and 1983: Data Analysis and Interpretation

This report was cited in "A Scientific Historical Review: the Atmospheric Sciences Program at the Illinois State Water Survey" (ISWS MP-171, http://hdl.handle.net/2142/49888) as Gatz, D.F., V.C. Bowersox, J. Su, and G.J. Stensland, 1988: Great Lakes Atmospheric Deposition (GLAD) Network, 1982 and 1983: Data Analysis and Interpretation. SWS Contract Report 448, Chicago, IL, 69 pp. officially issued as cited, and was not listed in the ISWS publications database nor available via the ISWS website.In the ISWS 1995 Publications Catalog, Contract Report no. 448 is: Gatz, D.F., V.C. Bowersox, J. Su, and G.J. Stensland (1988) Great Lakes Atmospheric Deposition (GLAD) Network, 1982 and 1983: Data Analysis and Interpretation. The ISWS Publications database included the EPA report number U.EPA 905-4 88-002 in a note of the CR 448 record.Under the Great Lakes Water Quality Agreement of 1972, the United States and Canada were provided a framework for the surveillance, monitoring, research, protection, and reclamation of the physical and chemical quality of the Great Lakes system. Within this framework, the monitoring of atmospheric deposition in the U.S. is coordinated by the Great Lakes National Program Office (GLNPO) of the U.S. Environmental Protection Agency (U.S. EPA, 1985). Research in the 1970's had shown that atmospheric deposition was an important source of certain organic and inorganic chemicals to lake watersheds. A network of stations to measure and characterize this deposition was established in 1976. In 1981 the GLNPO upgraded this earlier measurement network by establishing the Great Lakes Atmospheric Deposition (GLAD) network. Its purpose was to determine atmospheric loadings of metals, nutrients, and major inorganic species to the Great Lakes and to evaluate annual trends in the chemical loadings of these species to the Lakes. During 1981 and early 1982, 36 monitoring stations were installed along the U.S. shores of the 5 Lakes. The GLAD network was designed to collect wet-only deposition samples at these near-shore locations. The purpose of this study was to analyze and interpret atmospheric wet deposition data collected by the GLAD network, including: 1) an assessment of data quality, 2) a comparison of specific pairs of GLAD and National Atmospheric Deposition Program (NADP) sites, 3) estimation of atmospheric loadings of selected elements to the five Great Lakes, and 4) an analysis of the potential change in loading estimates caused by closing certain GLAD sampling sites.Ope

Alkaline Aerosols: An Initial Investigation of Their Role in Determining Precipitation Acidity

published or submitted for publicationis peer reviewedOpe

Study of Atmospheric Pollution Scavenging: Eighteenth Progress Report

published or submitted for publicationis peer reviewedOpe

Study of Atmospheric Pollution Scavenging: Twenty-third Progress Report

published or submitted for publicationis peer reviewedOpe

Study of Atmospheric Pollution Scavenging: Twenty-second Progress Report

published or submitted for publicationis peer reviewedOpe

Study of Atmospheric Pollution Scavenging: Twentieth Progress Report

published or submitted for publicationis peer reviewedOpe

Study of Atmospheric Pollution Scavenging: Twenty-first Progress Report

published or submitted for publicationis peer reviewedOpe