Cloud Activation Potentials for Atmospheric α-Pinene and β-Caryophyllene Ozonolysis Products

Cloud Activation Potentials for Atmospheric α-Pinene and β-Caryophyllene Ozonolysis Products

The formation of atmospheric cloud droplets due to secondary organic aerosol (SOA) particles is important for quantifying the Earth's radiative balance under future, possibly warmer, climates, yet is only poorly understood. While cloud activation may be parametrized using the surface tension depression that coincides with surfactant partitioning to the gas-droplet interface, the extent to which...

Second-generation products of -caryophyllene ozonolysis

Y. J. Li, Q. Chen, M. I. Guzman, C. K. Chan, and S. T. Martin Environmental Engineering Program, Hong Kong University of Science and Technology, Hong Kong, China School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA now at: Department of Chemistry, University of Kentucky, Lexington, KY, USA Division of Environment, Hong Kong University of Science and Technology, Hon...

Particle mass yield from β-caryophyllene ozonolysis

The influence of second-generation products on the particle mass yield of β-caryophyllene ozonolysis was systematically tested and quantified. The approach was to vary the relative concentrations of firstand secondgeneration products by adjusting the concentration of ozone while observing changes in particle mass yield. For all wallloss corrected organic particle mass concentrations Morg of thi...

Parameterization of α-pinene ozonolysis SOA

Second-generation products contribute substantially to the particle-phase organic material produced by β-caryophyllene ozonolysis

The production of secondary organic aerosol (SOA) by the dark ozonolysis of gas-phase β-caryophyllene was studied. The experiments were conducted in a continuous-flow environmental chamber for organic particle mass concentrations of 0.5 to 30 μg m−3 and with ozone in excess, thereby allowing the study of second-generation particle-phase products under atmospherically relevant conditions. The pa...