Recent environmental chamber studies suggest that thereactions of nitrate radical (NO3) with several terpenes yieldoxidized products that partition appreciably to the condensed phase,constituting a significant source of secondary organic aerosol.  Observations of organic nitrate inambient nighttime aerosol in a region of high biogenic hydrocarbonconcentrations are consistent with this mechanism.  However, nitrate radical may also serve as a sink of organicaerosol via heterogeneous oxidation of unsaturated carbon-carbon bonds in theaerosol, yielding volatile organic nitrates.  This latter mechanism is explored using the WRF/Chemregional meteorology/atmospheric chemistry model.

NOx effects on secondary
organic aerosol formation: Aerosol production from NO<sub>3</sub> + biogenic
hydrocarbons and potential NO<sub>3</sub> heterogeneous loss

240th National Meeting (2010)

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NOx effects on secondary organic aerosol formation: Aerosol production from NO3 + biogenic hydrocarbons and potential NO3 heterogeneous loss

NOx effects on secondary organic aerosol formation: Aerosol production from NO₃ + biogenic hydrocarbons and potential NO₃ heterogeneous loss