AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Investigation of Intra-City Variation of Organic Aerosol Concentration and Composition through a Mobile/Satellite Sites Sampling Platform
PEISHI GU, Zhongju Li, Qing Ye, Naomi Zimmerman, Albert A. Presto, Allen Robinson, Carnegie Mellon University
Abstract Number: 437 Working Group: Urban Aerosols
Abstract Intra-city variation (1~10 km) of organic aerosol (OA) concentration and composition may be strongly influenced by near-by sources. Various physical and chemical processes may take place and modify the primary emission substantially and make spatial differences of organic aerosol significant within a small region. However, little is known about this process so far; most effort has been made to study the inter-city variation of OA. In this study starting from 2016 summer in Pittsburgh, PA, we will utilize aerosol mass spectrometry (AMS) in organic aerosol measurement on a mobile sampling platform. A second AMS will be deployed at a central urban background location. Instruments will also be deployed to measure NOX, PM2.5 mass and number concentration, and black carbon. Case studies of driving within selected 1 km-by-1 km blocks as well as through a pre-designed route will be conducted in a span of approximately one year. Special interest of source impacts include local traffic and restaurants. We will try to observe the physical and chemical advancement of the fresh emission and try to answer which process governs the changes in organic aerosol composition. This proposed poster will mainly deliver the experimental design and preliminary results from the results accomplished by the date of the conference.