Source resolved simulation of organic aerosol
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Θεοδωρίτση, Γεωργία
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Abstract
The chemical transport model PMCAMx was extended to investigate the eddects of partitioning and photochemical aging of primary biomass burning emissins on organic aerosol (OA) concentrations. A source-resolved version of the model was developed, PMCAMx-SR, in which biomass burning OA (bbOA) and its oxidation products are represented seperately from the other OA sources. The volatility distribution of bbOA was simulates using recent measurements. According to PMCAMx-SR, during the early summer period simulated, the contribution of bb emissions to total OA levels is approximately 4%. During winter the same contribution is nearly 28% due to both extensive residential wood combustion and wildfires in Portugal and Spain. The magnitude of these impacts also depends on the emissions of intermediate volatility organic compounds during biomass burning. In order to evaluate PMCAMx-SR performance, its predictions were compared with aerosol mass spectrometer measurements that took place in several sites around Europe. The new version of the model does have improved performance over the original PMCAMx in most sites.
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Aerosol, Biomass