Mass spectral evidence that small changes in composition caused by oxidative aging processes alter aerosol CCN properties.

@article{Shilling2007MassSE,
  title={Mass spectral evidence that small changes in composition caused by oxidative aging processes alter aerosol CCN properties.},
  author={John E. Shilling and Stephen M King and Michihiro Mochida and Douglas R Worsnop and Scot T Martin},
  journal={The journal of physical chemistry. A},
  year={2007},
  volume={111 17},
  pages={3358-68}
}
Oxidative processing (i.e., "aging") of organic aerosol particles in the troposphere affects their cloud condensation nuclei (CCN) activity, yet the chemical mechanisms remain poorly understood. In this study, oleic acid aerosol particles were reacted with ozone while particle chemical composition and CCN activity were simultaneously monitored. The CCN activated fraction at 0.66 +/- 0.06% supersaturation was zero for 200 nm mobility diameter particles exposed to 565 to 8320 ppmv O3 for less… CONTINUE READING