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Open Access Publications from the University of California

Secondary organic aerosol formation and organic nitrate yield from NO3oxidation of biogenic hydrocarbons

  • Author(s): Fry, JL
  • Draper, DC
  • Barsanti, KC
  • Smith, JN
  • Ortega, J
  • Winkler, PM
  • Lawler, MJ
  • Brown, SS
  • Edwards, PM
  • Cohen, RC
  • Lee, L
  • et al.

Published Web Location

© 2014 American Chemical Society. The secondary organic aerosol (SOA) mass yields from NO3oxidation of a series of biogenic volatile organic compounds (BVOCs), consisting of five monoterpenes and one sesquiterpene (α-pinene, β-pinene, Δ-3-carene, limonene, sabinene, and β-caryophyllene), were investigated in a series of continuous flow experiments in a 10 m3indoor Teflon chamber. By making in situ measurements of the nitrate radical and employing a kinetics box model, we generate time-dependent yield curves as a function of reacted BVOC. SOA yields varied dramatically among the different BVOCs, from zero for α-pinene to 38-65% for Δ-3-carene and 86% for β-caryophyllene at mass loading of 10 μg m-3, suggesting that model mechanisms that treat all NO3+ monoterpene reactions equally will lead to errors in predicted SOA depending on each location's mix of BVOC emissions. In most cases, organonitrate is a dominant component of the aerosol produced, but in the case of α-pinene, little organonitrate and no aerosol is formed.

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