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Volume 10, issue 12
Atmos. Chem. Phys., 10, 5425–5434, 2010
https://doi.org/10.5194/acp-10-5425-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Chemistry, Emission, and Transport of Atmospheric Mercury...

Atmos. Chem. Phys., 10, 5425–5434, 2010
https://doi.org/10.5194/acp-10-5425-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  21 Jun 2010

21 Jun 2010

Atmospheric deposition of mercury and major ions to the Pensacola (Florida) watershed: spatial, seasonal, and inter-annual variability

J. M. Caffrey1, W. M. Landing2, S. D. Nolek3, K. J. Gosnell4, S. S. Bagui5, and S. C. Bagui6 J. M. Caffrey et al.
  • 1Center for Environmental Diagnostics and Bioremediation, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, USA
  • 2Dept. of Oceanography, Florida State University, 1015 West Call Street, Tallahassee, FL 32306-4320, USA
  • 3PetroAlgae, 1901 S. Harbor City Blvd., Suite 300, Melbourne, FL 32901, USA
  • 4Dept. of Oceanography, Florida State University, 1015 West Call Street, Tallahassee, FL 32306-4320, USA
  • 5Dept. of Computer Science, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, USA
  • 6Dept. of Mathematics and Statistics, University of West Florida, 11000 University Parkway, Pensacola, FL 32514, USA

Abstract. Atmospheric deposition was measured at three sites in the Pensacola Bay watershed, Florida, between November 2004 and December 2007. Mercury deposition in the Pensacola Bay watershed was similar to that from nearby Mercury Deposition Network sites along the Northern Gulf of Mexico coast. Mercury deposition during the summer months is higher than other months due to higher concentrations in rainfall throughout the region. Deposition of constituents like H+, sulfate, nitrate, ammonium, chloride and sodium, were much higher in Pensacola Bay that at National Atmospheric Deposition Program (NADP) sites. Chloride and sodium deposition are higher because Pensacola Bay sites are closer to the Gulf of Mexico which is a source of sea salt aerosols. Acid rain constituents, H+, sulfate, nitrate and ammonium are most likely higher at Pensacola Bay sites because these sites are much closer to emission sources of these constituents than NADP sites, particularly two Florida NADP sites, FL14 and FL23, which are located in rural counties far from major industrial activities.

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