The role of sea-salt emissions and heterogeneous chemistry in the air quality of polluted coastal areas
Item
Title (Dublin Core)
The role of sea-salt emissions and heterogeneous chemistry in the air quality of polluted coastal areas
Description (Dublin Core)
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.
Creator (Dublin Core)
Athanasopoulou, E.
Tombrou, M.
Pandis, S. N.
Russell, A. G.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-8-5755-2008
https://acp.copernicus.org/articles/8/5755/2008/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
