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Methods for Characterizing the Distribution of Exhaust Emissions from Light-Duty, Gasoline-Powered Motor Vehicles in the U.S. Fleet
Citation:
FULPER, CARL R., S. Kishan, R. W. BALDAUF, M. Sabisch, J. WARILA, C. SCARBRO, E. M. Fujita, W. C. Crews, R. Snow, AND P. GABELE. Methods for Characterizing the Distribution of Exhaust Emissions from Light-Duty, Gasoline-Powered Motor Vehicles in the U.S. Fleet. JOURNAL OF AIR AND WASTE MANAGEMENT. Air & Waste Management Association, Pittsburgh, PA, 60(11):1376-1387, (2010).
Impact/Purpose:
journal article
Description:
Mobile sources significantly contribute to ambient concentrations of airborne particulate matter. Source apportionment studies for PMlO and PM2.5 indicate that mobile sources can be responsible for over half of the ambient PM measured in an urban area. Recent source apportionment studies have attempted to differentiate between contributions from gasoline and diesel motor vehicle combustion. A comprehensive testing program was initiated in Kansas City to identify the distribution of PM emissions in the light duty, gasoline-powered on-road mobile source fleet to address PM inventory, modeling, and health effects issues. Vehicle recruitment aimed to produce a sample of vehicles which could represent the national fleet. All vehicles tested were shown to satisfactorily represent the Kansas City metropolitan statistical. Emissions testing utilized a portable light-duty chassis dynamometer using an LA-92 driving cycle, on-board emissions measurement systems, and remote sampling devices. PM mass emissions were the focus of the sample analysis, with continuous and integrated samples collected. In addition, sample analyses included regulated gases (CO, C02, NO/N02, HC), unregulated gases (speciated VOCs) and PM constituents (EC/OC, metals, semi-volatile organic compounds.
