Field measurements of the concentrations of oxygenated organics in urban air and in forest were carried out. The results were used to test the model of atmospheric transformation of biogenic compounds. The simulation showed that condensable compounds of several classes are formed: hydroperoxides, peroxides, alkylperoxynitrates and nitrites, peracids. Their aerosol-generating potential was evaluated on the basis of the calculated steady-state concentrations of the direct precursors of aerosol phase. It was discovered that the main precursors of the nuclei of solid phase are hydroperoxides and peracids. The reason of their efficiency is their photolysis with the formation of oxygenated free radicals, which initiate gas-to-particle conversion through polymerization of unsaturated compounds via the free radical mechanism.
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The work was carried out with support from the Russian Foundation for Basic Research and Novosibirsk Region within the research Project no. 19-43-540 009.
Authors declare no conflict of interests.
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Dultseva, G.G., Nemova, E.F., Dubtsov, S.N. et al. Aerosol Generating Potential of the Products of Atmospheric Photooxidation of Biogenic Organic Compounds. Atmos Ocean Opt 33, 545–548 (2020). https://doi.org/10.1134/S1024856020050073
- biogenic compounds
- atmospheric organic aerosol
- aerosol formation