TEMPORAL AND SPATIAL TRENDS OF HISTORIC MERCURY ACCUMULATION IN THE NEW YORK FINGER LAKES
By the 1900s, Hg accumulation increased sharply in lakes proximal to coal-fired power plants. Changes in Hg accumulation in the other lakes is not as pronounced. Hg profiles in all six lakes mimic the history of coal combustion for residential and commercial heating in New York, Pennsylvania, Ohio, and the U.S. as a whole. The similarity in pattern emphasizes that these lakes are receiving their Hg flux from similar atmospheric sources. Hg profiles in Seneca Lake and Cayuga Lake illustrate the most dramatic changes since ~1890, perhaps due to local or watershed level factors such as proximity to the coal-fired power plant, watershed size, land use, and percentage of wetland that control export of Hg from the watershed to the lake.