HR: 16:30h
AN: A14A-03    [Abstracts]
TI: On-Road Measurement of Vehichle VOC Emission Measurements During the 2003 Mexico City Metropolitan Area Field Campaign
AU: * Knighton, W B
EM: bknighton@chemistry.montana.edu
AF: Montana State University, Department of Chemistry, Bozeman, MT 59717 United States
AU: Rogers, T
AF: Montana State University, Department of Chemistry, Bozeman, MT 59717 United States
AU: Grimsrud, E
AF: Montana State University, Department of Chemistry, Bozeman, MT 59717 United States
AU: Herndon, S
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Allwine, E
AF: Washington State University, Laboratory for Atmospheric Research Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Lamb, B
AF: Washington State University, Laboratory for Atmospheric Research Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Velasco, E
AF: Washington State University, Laboratory for Atmospheric Research Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Westberg, H
AF: Washington State University, Laboratory for Atmospheric Research Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AB: In the spring of 2003 (April 1-May 5), a multinational team of experts conducted an intensive, five-week field campaign in the Mexico City Metropolitan Area (MCMA). The overall goal of this effort was to contribute to the understanding of the air quality problem in megacities. As part of the campaign the Aerodyne Mobile Laboratory was equipped with state-of-the-art analytical instruments and deployed for measuring a variety of vehicle emissions in real time including CO2, NO2, NH3, HCHO, VOC's and volatile (at 600 øC) aerosol. The on-road measurement of vehicle VOC emissions were performed using a commercial version of the IONICON PTR-MS modified to operate onboard the mobile lab platform. A summary of the PTR-MS results from these and supporting laboratory experiments will be presented and discussed. In particular, selected chase events will be presented to illustrate the utility of the PTR-MS technique for characterizing vehicle VOC emission profiles in real time. VOC emission profiles for different vehicle engine types which include gasoline, diesel and compressed natural gas will be discussed and compared to the measurements from other high time response instruments deployed on the Aerodyne mobile van.
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting