AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Highlights from the St. Louis Air Quality Regional Study (SLAQRS) 2013
BRENT WILLIAMS, Dhruv Mitroo, Raul Martinez, Yaping Zhang, Michael Walker, Christopher Oxford, Xiaochen Zuo, David Hagan, Steven Dhawan, Li Du, Jay Turner, Gavin McMeeking, Laura King, Hongyu Guo, Rodney Weber, Munkhbayar Baasandorj, Lu Hu, Dylan Millet, Washington University in St. Louis
Abstract Number: 443 Working Group: Air Quality and Climate in the Southeast US: Insights from Recent Measurement Campaigns
Abstract The St. Louis Air Quality Regional Study (SLAQRS) took place at the previous EPA Midwest Supersite in East St. Louis, IL between August 4th - October 11th 2013. A wide range of particle physical and chemical characterization techniques were employed as well as a number of gas phase detectors and high-resolution meteorological equipment. Additionally, a potential aerosol mass (PAM) reaction chamber was utilized to perturb oxidation states of ambient mixtures. Several highlights of this project include a comparison of 4 different black carbon measurement techniques, high time resolution correlations between particle volatility, hygroscopicity, and chemical data at the molecular level, and establishment of the St. Louis region as a highly interesting measurement site for future studies of the impact on secondary aerosol production from mixed anthropogenic/biogenic sources. Compared to other southeastern U.S. cities that are continuously impacted by isoprene emissions during the summer months, the St. Louis region, being situated at the northern edge of the Ozark Mountains, is only periodically impacted by isoprene emissions (at very high concentrations), but local anthropogenic emissions remain fairly constant regardless of specific regional air masses.