Paper No. 5-13
Presentation Time: 8:00 AM-6:00 PM
DECONVOLUTING MERCURY DEPOSITION PATTERNS ACROSS SPACE AND TIME
PERRY, E.R.1, NORTON, S.A.1, and KAMMAN, N.2, (1) Department of Earth and Environmental Sciences, University of Maine, 5790 Bryand Global Science Center, Orono, ME 04469, ethan.perry@umit.maine.edu, (2) Vermont Department of Environmental Conservation, 103 South Main Street, 10N, Waterbury, VT 05671

The total atmospheric contribution of mercury (HgT) to lake sediments can be quantified using cores acquired from the deep portions of lakes. Sediment core intervals are dated radiometrically with 210Pb and are analyzed by various methods to determine Hg concentration values. Algorithms based on estimates of lake and watershed processes can be applied to data to more accurately assess the anthropogenic contribution of Hg to the environment (HgA). The calculation of HgA values has been the major goal of recent research in the northeast US. Application of GIS software can provide a regional platform upon which HgA values can be compared across time and space. Time series maps have been developed at 1850, 1900, 1950, 1975 and 1990 time slices to view the background, the transitional, and the modern HgA values. Incorporation of additional data points will enhance the temporal and spatial resolution of the map series. This GIS database will provide a straightforward means to present atmospheric Hg deposition information, as determined from lake cores, from across New England, the upper Midwest, and the Maritime provinces.

Northeastern Section - 38th Annual Meeting (March 27-29, 2003)
General Information for this Meeting
Session No. 5--Booth# 26
Quaternary Geology, Geomorphology, and Environmental Geoscience (Posters)
Westin Hotel: Commonwealth A
8:00 AM-6:00 PM, Thursday, March 27, 2003
 

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