AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
Abstract View
Source Attribution with PMF of Recent Speciated PM2.5 in Bakersfield, California
Yufei Dong, SHANNON CAPPS, Drexel University
Abstract Number: 740 Working Group: Source Apportionment
Abstract Concentrations of particulate matter less than 2.5 μm in diameter (PM2.5) in Bakersfield, California, have been higher than most U.S. cities in recent decades. Significant portions of these aerosol are ammonium nitrate. Emissions controls on oxides of nitrogen (NOx) have changed the mix of aerosols observed from 2001-2013 (Pusede et al., 2016). We investigate the sources contributing to recently observed aerosol to support selection of the next targets for emissions control. Specifically, we apply the Environmental Protection Agency’s Positive Matrix Factorization (PMF) software to a multi-year set of filter-based observations of speciated PM2.5 from the California Air Resources Board site at Bakersfield, California. Seasonal patterns and annual trends in the contributions of factors that represent unique source types provide insight into opportunities to further reduce concentrations of PM2.5 in this part of the San Joaquin Valley.