Contribution of sulfate and organic aerosols to cloud condensation nuclei at Point Reyes, California
- Lawrence Berkeley Lab., CA (United States)
- Lawrence Livermore National Lab., CA (United States)
We have determined mass size distributions of major aerosol species by the Micro Orifice Uniform Deposit Impactor (MOUDI) and simultaneously measured aerosol number size distributions and CCN number concentrations (at 0.5% supersaturation) at a Pacific coastal site (Point Reyes, California). Number size distributions were calculated from the impactor data from which the mass contributions of sulfate, organic, and seasalt aerosols to CCN number concentrations were estimated. The derived and measured size distributions and the derived and measured CCN number concentrations were found to be in good agreement. Our results demonstrate that organic aerosols, depending on the meteorological conditions, may contribute a variable and often dominant fraction to the CCN concentrations.
- OSTI ID:
- 126288
- Report Number(s):
- CONF-950402--
- Country of Publication:
- United States
- Language:
- English
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