AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Study of Ambient Solid Particle Size Distribution in Riverside California
YUE LIN, Kihong Park, Heejung S. Jung, University of California, Riverside
Abstract Number: 372 Working Group: Carbonaceous Aerosols in the Atmosphere
Abstract There is an increased interest to monitor temporarily and spatially resolved ultrafine particle concentrations in ambient air. Total particle number (TPN) concentrations measured by earlier studies showed an anti-correlation with PM2.5 therefore not appropriate as a metric for monitoring. Solid particle counting method is a well-established technique to measure emissions from vehicle exhaust. It eliminates contribution of semivolatiles using a volatile particle remover and achieves more consistent and repeatable measurement for vehicle exhaust particle emissions. This study applied a similar approach to measure solid particle size distributions in ambient air in Riverside, CA. A catalytic stripper (CS) was used with a SMPS system to remove volatile component in ambient aerosol for size distribution measurement. Particle size distributions measured with and without CS over a week period will be presented. Particle effective density was also measured semi-continuously at the same location. The study aims to relate the density and solid vs total particle size distribution measurement to the mixing state of the aerosol and estimation of potential health effects from volatile and non-volatile particles.