Abstract. Secondary organic aerosol (SOA) generated from the photooxidation of aromatic compounds in presence oxides nitrogen (NOx) is known to efficiently absorb ultraviolet and visible radiation. With exposure sunlight, photodegradation chromophoric SOA causes this type slowly photobleach. These reactions may occur cloud droplets, which are characterized by low concentrations solutes, or part...

Twenty-five biogenic and anthropogenic secondary organic aerosol (SOA) markers have been measured over a one-year period in both gaseous PM10 phases the Paris region (France). Seasonal chemical patterns were similar to those previously observed Europe, but significantly different from ones America Asia due dissimilarities source precursor emissions. Nitroaromatic compounds showed higher concent...