the role of sea-salt emissions and heterogeneous chemistry in the air quality of polluted coastal areas

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ID: 196033
2008
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Abstract
Open-ocean and surf-zone sea-salt aerosol (SSA) emission parameterizations are incorporated in the CAMx aerosol model and applied over an area with an extended Archipelago (Greece), with a fine grid nested over the highly populated Attica peninsula. The maximum indirect impact of SSA on PM<sub>10</sub> mass (35%) is located over a marine area with moderate SSA production and elevated shipping emissions (central Aegean Sea) where SSA interacts with anthropogenic nitric acid forming sodium nitrate. SSA increases PM<sub>10</sub> levels in the Athens city center up to 25% during stable onshore winds. Under such conditions both open-ocean and surf-zone mechanisms contribute to aerosol production over Attica. A hybrid scheme for gas-to-particle mass transfer is necessary for accurately simulating semi-volatile aerosol components when coarse SSA is included. Dynamically simulating mass transfer to the coarse particles leads to a quadrupling of predicted PM<sub>10</sub> nitrate in the Athens city center and up to two orders of magnitude in its coarse mass in comparison to using a bulk equilibrium approach.
Reference Key
athanasopoulou2008atmosphericthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;E. Athanasopoulou;M. Tombrou;S. N. Pandis;A. G. Russell
Journal Journal of agricultural and food chemistry
Year 2008
DOI
DOI not found
URL
http://www.atmos-chem-phys.net/8/5755/2008/acp-8-5755-2008.pdf
Keywords
physicschemistry

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