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Detailed Reference Information |
Strode, S.A., Jaeglé, L., Selin, N.E., Jacob, D.J., Park, R.J., Yantosca, R.M., Mason, R.P. and Slemr, F. (2007). Air-sea exchange in the global mercury cycle. Global Biogeochemical Cycles 21: doi: 10.1029/2006GB002766. issn: 0886-6236. |
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We present results from a new global atmospheric mercury model coupled with a mixed layer slab ocean. The ocean model describes the interactions of the mixed layer with the atmosphere and deep ocean, as well as conversion between elemental, divalent, and nonreactive mercury species. Our global mean aqueous concentrations of 0.07 pM elemental, 0.80 pM reactive, and 1.51 pM total mercury agree with observations. The ocean provides a 14.1 Mmol yr-1 source of mercury to the atmosphere, at the upper end of previous estimates. Re-emission of previously deposited mercury constitutes 89% of this flux. Ocean emissions are largest in the tropics and downwind of industrial regions. Midlatitude ocean emissions display a large seasonal cycle induced by biological productivity. Oceans contribute 54% (36%) of surface atmospheric mercury in the Southern (Northern) Hemisphere. We find a large net loss of mercury to the deep ocean (8.7 Mmol yr-1), implying a ~0.7%/year increase in deep ocean concentrations. |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Geochemical cycles, Atmospheric Composition and Structure, Constituent sources and sinks, Atmospheric Composition and Structure, Air/sea constituent fluxes (3339, 4504) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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