Organic aerosols have a significant impact on air quality, visibility, and climate. Solar radiation represents the main driving force for the reactions leading to organic aerosol formation and subsequent aging. This presentation will discuss the effects of particle-phase and aqueous-phase photochemical aging processes on the molecular level chemical composition and optical properties of organic aerosols investigated with high resolution mass spectrometry, spectrophotometry, and traditional smog chamber methods. The focus of this presentation will be on the effect of aerosol particle viscosity on photochemistry and on the evolution of the absorption coefficient of the aerosol organic materials induced by solar radiation.

Photochemistry in secondary organic aerosols

248th National Meeting (2014)

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