On the fractional solubility of copper in marine aerosols: Toxicity of aeolian copper revisited

Details On the fractional solubility of copper in marine aerosols: Toxicity of aeolian copper revisited On the fractional solubility of copper in marine aerosols: Toxicity of aeolian copper revisited

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3720601s&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 20, CiteID L20601

Mathematics

Logic

Oceanography: Biological And Chemical: Aerosols (0305, 4906), Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Biogeosciences: Bioavailability: Chemical Speciation And Complexation, Oceanography: Biological And Chemical: Biogeochemical Cycles, Processes, And Modeling (0412, 0414, 0793, 1615, 4912)

Scientific paper

Paytan et al. (2009) argue that the atmospheric deposition of aerosols lead to copper concentrations that are potentially toxic to marine phytoplankton in a large area of tropical and subtropical North Atlantic Ocean. A key assumption in their model is that all marine aerosols (mineral dust and anthropogenic particles) have a high (40%) fractional solubility of copper. Our data show that the fractional solubility of copper for Saharan dust over the Sargasso Sea and Bermuda is significantly lower (1-7%). In contrast, anthropogenic aerosols with non-Saharan sources have significantly higher values (10-100%). Hence, the potential Cu toxicity in the tropical and subtropical North Atlantic should be re-estimated, given the low fractional solubility of Cu in the Saharan dust that dominates aerosol deposition to this region.

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