Aerosol and Product Yields from NO3 Radical-Initiated Oxidation of Selected Monoterpenes

Atmospheric transformation of monoterpenes gives products that may cause environmental consequences. In this work the NO3 radical-initiated oxidation of the monoterpenes α-pinene, β-pinene, Δ3-carene, and limonene has been investigated. All experiments were conducted in EUPHORE, the EUropean PHOto REactor facility in Valencia, Spain. The aerosol and product yields were measured in experiments with a conversion of the terpenes in the interval from 7 to 400 ppb. The lower end of the concentrations used are close to those measured in ambient pine forest air. Products were measured using long path in situ FTIR. Aerosol yields were obtained using a DMA-CPC system. The aerosol mass yields measured at low concentrations (10 ppb terpene reacted) were