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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 18 | Copyright
Atmos. Chem. Phys., 13, 9169-9181, 2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 16 Sep 2013

Research article | 16 Sep 2013

Atmospheric processing of iron carried by mineral dust

S. Nickovic1,4, A. Vukovic2,3, and M. Vujadinovic2,3 S. Nickovic et al.
  • 1World Meteorological Organization, Geneva, Switzerland
  • 2Faculty of Agriculture, University of Belgrade, Belgrade, Serbia
  • 3South East European Virtual Climate Change Center, Belgrade, Serbia
  • 4Institute of Physics, Belgrade, Serbia

Abstract. Nutrification of the open ocean originates mainly from deposited aerosol in which the bio-avaliable iron is likely to be an important factor. The relatively insoluble iron in dust from arid soils becomes more soluble after atmospheric processing and, through its deposition in the ocean, could contribute to marine primary production. To numerically simulate the atmospheric route of iron from desert sources to sinks in the ocean, we developed a regional atmospheric dust-iron model that included parameterization of the transformation of iron to a soluble form caused by dust mineralogy, cloud processes and solar radiation. When compared with field data on the aerosol iron, which were collected during several Atlantic cruises, the results from the higher-resolution simulation experiments showed that the model was capable of reproducing the major observed patterns.

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