HR: 0800h
AN: A11A-0004    [Abstracts]
TI: Location and Mapping of an Ethyl Acetate Plume in Mexico City
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: Knighton, W
EM: bknighton@chemistry.montana.edu
AF: Montana State University, Department of Chemistry, Bozeman, MT 59717 United States
AU: Velasco, E
AF: Washington State University, Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Lamb, B
AF: Washington State University, Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Westberg, H
AF: Washington State University, Department of Civil & Environmental Engineering, Pullman, WA 99164 United States
AU: Jobson, T
AF: Pacific Northwest National Lab, P.O.Box 999, MSIN K9-30, Richland, WA 99352 United States
AU: Alexander, M
AF: Pacific Northwest National Lab, P.O.Box 999, MSIN K9-30, Richland, WA 99352 United States
AU: Prazeller, P
AF: Pacific Northwest National Lab, P.O.Box 999, MSIN K9-30, Richland, WA 99352 United States
AU: Herndon, S
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AU: Kolb, C
AF: Aerodyne Research, Inc., 45 Manning Road, Billerica, MA 01821 United States
AB: A major goal of the 2003 Mexico City Metropolitan Area (MCMA) field campaign was to gain a better understanding of the dispersion and transport of volatile organic compounds (VOCs) in this urban airshed. Continuous monitoring of VOCs in the atmosphere and identification and quantification of their emission sources is complicated by two factors: first, there are hundreds of different VOC species released daily in the MCMA atmosphere, and second, few real time (1-10 second) measurement techniques have been available to provide the high resolution spatial and/or temporal data usually required to locate VOC emission sources and measure their flux strength. A relatively new technique, Proton Transfer Reaction Mass Spectometery (PTR-MS) provides this capability and was used to locate and quantify a significant source of ethyl acetate in the Iztapalapa region of Mexico City. Two PTR-MS systems were deployed during the 2003 MCMA campaign, the MSU PTR-MS was operated on-board the Aerodyne Mobile Laboratory while the PNNL instrument located on the roof at the National Center for Environmental Research and Training (Centro Nacional de Investigacion y Capacitacion Ambiental or CENICA). The uniqueness of the ethyl acetate signature allowed the MSU PTR-MS on-board the mobile lab to track the ethyl acetate plume back to its source. A short movie documenting the plume mapping and location of the source of the ethyl acetate emission will be shown. Knowing of the plume source location and the local meteorological conditions, the time resolved responses from the PNNL PTR-MS at the CENCIA location have been applied to a simple plume model to estimate the plume's emission flux strength.
DE: 0345 Pollution--urban and regional (0305)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting