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Riverine source of Arctic Ocean mercury inferred from atmospheric observations
(Springer Nature, 2012)
Methylmercury is a potent neurotoxin that accumulates in aquatic food webs. Human activities, including industry and mining, have increased inorganic mercury inputs to terrestrial and aquatic ecosystems. Methylation of ...
Multi-Decadal Decline of Mercury in the North Atlantic Atmosphere Explained by Changing Subsurface Seawater Concentrations
(American Geophysical Union, 2012)
[1] We analyze 1977–2010 trends in atmospheric mercury (Hg) from 21 ship cruises over the North Atlantic (NA) and 15 over the South Atlantic (SA). We find a steep 1990–2009 decline of −0.046 ± 0.010 ng m−3 a−1 (−2.5% a−1) ...
An Improved Global Model for Air-Sea Exchange of Mercury: High Concentrations over the North Atlantic
(American Chemical Society (ACS), 2010)
We develop an improved treatment of the surface ocean in the GEOS-Chem global 3-D biogeochemical model for mercury (Hg). We replace the globally uniform subsurface ocean Hg concentrations used in the original model with ...
Factors Driving Mercury Variability in the Arctic Atmosphere and Ocean over the Past 30 Years
(Wiley-Blackwell, 2013)
[1] Long-term observations at Arctic sites (Alert and Zeppelin) show large interannual variability (IAV) in atmospheric mercury (Hg), implying a strong sensitivity of Hg to environmental factors and potentially to climate ...
Elemental Mercury Concentrations and Fluxes in the Tropical Atmosphere and Ocean
(American Chemical Society (ACS), 2014)
Air–sea exchange of elemental mercury (Hg0) is a critical component of the global biogeochemical Hg cycle. To better understand variability in atmospheric and oceanic Hg0, we collected high-resolution measurements across ...
A mass budget for mercury and methylmercury in the Arctic Ocean
(Wiley-Blackwell, 2016)
Elevated biological concentrations of methylmercury (MeHg), a bioaccumulative neurotoxin, are observed throughout the Arctic Ocean, but major sources and degradation pathways in seawater are not well understood. We develop ...