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Currently, I am investigating the atmospheric and aquatic cycles of mercury and other trace metals in a variety of multifaceted studies, which are often interdisciplinary and involve international collaboration. These efforts range from global models to studies of the role of microorganisms in elemental Hg and monomethyl Hg production. My research pursuits include a U.S./French cooperative program focused on Hg cycling in the marine environment, and with the development of innovative analytical techniques for the determination of Hg species and stable isotopes of Hg. The aquatic biogeochemistry of mercury in Long Island Sound is of special interest. Ombrotrophic peat bogs and lake sediments in Nova Scotia, New Zealand, and Arctic Alaska are being tested to determine the potential usefulness of such ecosystems in providing unequivocal records of contemporary and historical atmospheric depositional fluxes of mercury, as well as a measure of anthropogenic perturbations on a global basis, and as means of constraining regional and global models of the Hg cycle. I initiated a NSF supported program to examine Hg contamination and cycling in the Arctic. Alaskan lacustrine systems are emphasized. This work complements ongoing investigations into the pathways and processes determining the fate of mercury in coastal and open ocean environments.
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Alaska's Changing Arcticpp.287-302, (2014)
Treatise on Geochemistryno. 3 (2014): 91-129
mag(2014)
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