Particle size relationships at the Fresno Supersite

John G. Watson, Judith C. Chow, Douglas H. Lowenthal, Mark R. Stolzenburg, Nathan M. Kreisberg, Susanne V. Hering

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


Aerosol size distributions are presented for a winter intensive study at the Fresno Supersite. The size distributions were consistent with and predictive for continuous PM2.5 measured by beta attenuation. They varied temporally with respect to source type and intensity, with the smallest mean diameters associated with high NOx concentrations during weekday morning rush hours. Conversely, small and large particle and black carbon (BC) concentrations were higher during Sunday and weekday evenings in response to traffic and residential wood combustion emissions. Ambient PM2.5 light scattering (Bsp) was precisely but systematically underestimated during winter, probably because of heating in the sample shelter.

Original languageEnglish (US)
Pages (from-to)822-827
Number of pages6
JournalJournal of the Air and Waste Management Association
Issue number7
StatePublished - Jan 1 2002


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