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Experimental data on SOA formation from mixtures of anthropogenic and biogenic organic compounds

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Author(s): M. G. VIVANCO | M. SANTIAGO | M. SÁNCHEZ | M. A. CLAVERO | E. BORRÁS | M. RÓDENAS | F. ALACREU | M. VÁZQUEZ | E. CLEMENTE | R. PORRAS | A. MUÑOZ | A. STEIN

Journal: Atmósfera
ISSN 0187-6236

Volume: 26;
Issue: 1;
Start page: 59;
Date: 2013;
Original page

Keywords: SOA formation | chamber experiments | organic gases | aerosols

ABSTRACT
Secondary organic aerosols (SOA) constitute a significant fraction of the atmospheric particulate matter. Theses particles are formed as a consequence of the oxidation reaction of certain organic gases that leads to the formation of low-volatility compounds. As for other pollutants, air quality models allow the simulation of particle levels and thus models constitute a powerful tool in air quality management. Nevertheless, the accepted use of models must be based on the validation of its capacity to reproduce observed concentrations.Air monitoring sites provide measured information of a large variety of ambient pollutants. Unfortunately,measurements on SOA are not normally available, as current monitoring networks do not include instrumentationto distinguish primary from secondary sources of organic carbonaceous aerosol. This paper presentsa set of photooxidation experiments performed in the European Photorreactor (EUPHORE) smog chamber(CEAM, Spain) under different experimental conditions to investigate SOA formation. The use of chambersallows the isolation of atmospheric chemistry and aerosol formation processes. Thus, although thesemeasurements were obtained at initial precursor concentrations higher than those in atmospheric conditions,they constitute a valuable set of information for SOA model evaluation purposes.

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