Mercury flux to sediments of Lake Tahoe, California-Nevada


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dc.contributor.author Drevnick, Paul E.
dc.contributor.author Shinneman, Avery L. C.
dc.contributor.author Lamborg, Carl H.
dc.contributor.author Engstrom, Daniel R.
dc.contributor.author Bothner, Michael H.
dc.contributor.author Oris, James T.
dc.date.accessioned 2010-09-30T13:50:59Z
dc.date.available 2010-11-04T08:21:51Z
dc.date.issued 2009-08-12
dc.identifier.uri http://hdl.handle.net/1912/3923
dc.description Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Water, Air, & Soil Pollution 210 (2010): 399-407, doi:10.1007/s11270-009-0262-y. en_US
dc.description.abstract We report estimates of mercury (Hg) flux to the sediments of Lake Tahoe, California-Nevada: 2 and 15-20 µg/m2/yr in preindustrial and modern sediments, respectively. These values result in a modern to preindustrial flux ratio of 7.5-10, which is similar to flux ratios recently reported for other alpine lakes in California, and greater than the value of 3 typically seen worldwide. We offer plausible hypotheses to explain the high flux ratios, including (1) proportionally less photoreduction and evasion of Hg with the onset of cultural eutrophication and (2) a combination of enhanced regional oxidation of gaseous elemental Hg and transport of the resulting reactive gaseous Hg to the surface with nightly downslope flows of air. If either of these mechanisms is correct, it could lead to local/regional solutions to lessen the impact of globally increasing anthropogenic emissions of Hg on Lake Tahoe and other alpine ecosystems. en_US
dc.description.sponsorship Funding was provided by Miami University, EPA-STAR, the Postdoctoral Scholar Program at Woods Hole Oceanographic Institution, and the USGS. en_US
dc.format.mimetype application/pdf
dc.format.mimetype image/jpeg
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1007/s11270-009-0262-y
dc.subject Mercury en_US
dc.subject Sediment en_US
dc.subject Lake Tahoe en_US
dc.subject Alpine en_US
dc.title Mercury flux to sediments of Lake Tahoe, California-Nevada en_US
dc.type Preprint en_US

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