HR: 09:36h
AN: A31D-08    [Abstracts]
TI: Heavy-Duty Vehicle Emissions in the Mexico City Metropolitan Area during the MCMA-2003 Field Measurement Campaign
AU: * Zavala, M
EM: miguelz@mit.edu
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Dunlea, E J
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Dunlea, E J
AF: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, UCB 216, Boulder, CO 80309 United States
AU: Marr, L
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Marr, L
AF: Virginia Polytechnic Institute and State University, Department of Civil and Environmental Engineering, 411 Durham Hall, Blacksburg, VA 24061 United States
AU: Slott, R S
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Molina, L T
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Molina, M J
AF: Departments of Earth, Atmospheric and Planetary Sciences and of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 United States
AU: Herndon, S C
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Jayne, J T
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Shorter, J H
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Worsnop, D
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Zahniser, M
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Onasch, T
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Kolb, C E
AF: Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA 01821 United States
AU: Rogers, T
AF: Montana State University, Department of Chemistry, P.O. Box 173400, Bozeman, MT 59717 United States
AU: Knighton, B
AF: Montana State University, Department of Chemistry, P.O. Box 173400, Bozeman, MT 59717 United States
AB: On-road vehicle emissions were measured in the Mexico City Metropolitan Area (MCMA) as part of an intensive, five-week, field campaign held in the spring of 2003 (April 1 - May 5). Vehicle emissions measurements were made during vehicle chase experiments using the Aerodyne Mobile Laboratory. The mobile lab was equipped with a large suite of state-of-the-art analytical instruments for measuring both gas and particle phase chemical components from vehicle emissions in real time. The experiment represents a real-world sample of more than 200 in-use vehicles. The results presented here focus on heavy-duty gasoline (HDGT) and heavy-duty diesel trucks (HDDT), although measurements included pick up trucks, colectivos (microbuses), and private automobiles as well. The use of covariance and fitting methods for individual species vs. CO2 allows the estimation of individual emission ratios in a real time plume-based analysis. The variability of emission ratios within a vehicle class and during different driving modes (acceleration, idling, etc.) are explored. Results are reported as molar emission ratios of emission gases with carbon dioxide. These and other vehicle-related emissions measured during the campaign will be presented and discussed. These types of studies are important for the development of emission inventories and their use in air quality modeling studies in urban areas.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting