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Particle Size Relationships at the Fresno Supersite

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

Aerosol size distributions are presented for a winter intensive study at the Fresno Supersite. The size distributions were consistent with and predictive for continuous PM_2.5 measured by beta attenuation. They varied temporally with respect to source type and intensity, with the smallest mean diameters associated with high NO_x 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 PM_2.5 light scattering (Bsp) was precisely but systematically underestimated during winter, probably because of heating in the sample shelter.

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Particle Size Relationships at the Fresno Supersite

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

Aerosol size distributions are presented for a winter intensive study at the Fresno Supersite. The size distributions were consistent with and predictive for continuous PM_2.5 measured by beta attenuation. They varied temporally with respect to source type and intensity, with the smallest mean diameters associated with high NO_x 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 PM_2.5 light scattering (Bsp) was precisely but systematically underestimated during winter, probably because of heating in the sample shelter.

Particle Size Relationships at the Fresno Supersite

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

Aerosol size distributions are presented for a winter intensive study at the Fresno Supersite. The size distributions were consistent with and predictive for continuous PM_2.5 measured by beta attenuation. They varied temporally with respect to source type and intensity, with the smallest mean diameters associated with high NO_x 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 PM_2.5 light scattering (Bsp) was precisely but systematically underestimated during winter, probably because of heating in the sample shelter.

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Title:

Particle Size Relationships at the Fresno Supersite

Contributors:

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

Published in:

Journal of the Air & Waste Management Association ; 52 ; 822-827

Publication date:

2002-07-01

Size:

6 pages

ISSN:

1096-2247 , 2162-2906

DOI:

https://doi.org/10.1080/10473289.2002.10470817

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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