Author(s)

Richard Winterhalter, Peter Neeb and Geert K. Moortgat

Abstract

Aerosol Formation in Gas-Phase Monoterpene Ozonolysis at Near-Atmospheric Concentration A contribution to subproject CMD Richard Winterhalter, Peter Neeb and Geert K. Moortgat Max-Planck-Institut fur Chemie, Division of Atmospheric Chemistry, P.O.Box 3060, D-55020Mainz, Germany Introduction Large amounts of terpenes are globally emitted (Zimmerman et al., 1978; Guenther et al, 1995) and the gas-to-particle conversion upon atmospheric degradation is suspected to form a main fraction of the secondary organic aerosol (SOA). Estimates range from 30 to 270 Tg y~* SOA compared to 140 Tg y~* anthropogenic and 90 Tg y~* biogenic sulfate (Andreae and Crutzen, 1997). For more accurate estimates, the understanding of the gas- phase mechanisms as well as the aerosol formation processes has to be improved. Results from smog chamber experiments (Hoffmann et al, 1997a) indicate, that the te

Keywords