HR: 08:30h
AN: A41F-02    [Abstracts]
TI: Observations of volatile organic compounds downwind of Mexico City during MIRAGE- MEX
AU: * Apel, E C
EM: apel@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Hills, A J
EM: hills@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Flocke, F
EM: ffl@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Zheng, W
EM: wengang@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Fried, A
EM: fried@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Weibring, P
EM: weibring@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: McKenna, D
EM: danny@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Emmons, L
EM: emmons@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Orlando, J
EM: orlando@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Karl, T
EM: tomkarl@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Campos, T
EM: campos@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Riemer, D D
EM: driemer@rsmas.miami.edu
AF: University of Miami, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, FL 33149, United States
AU: Atlas, E
EM: atlas@rsmas.miami.edu
AF: University of Miami, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, FL 33149, United States
AU: Blake, D
EM: dblake@orion.oac.uci.edu
AF: University of California, Irvine, 570 Rowland Hall, Irvine, CA 92715, United States
AU: Olson, J
EM: jennifer.r.olson@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401B, Hampton, VA 23188, United States
AU: Chen, G
EM: gao.chen@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401B, Hampton, VA 23188, United States
AU: Crawford, J
EM: James.H.Crawford@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401B, Hampton, VA 23188, United States
AU: Sive, B
EM: bcs@gust.sr.unh.edu>
AF: University of New Hampshire, 351 Morse Hall, Durham, NH 03824, United States
AB: Non-methane hydrocarbons (NMHCs) and oxygenated volatile organic compounds (OVOCs) were measured aboard the NCAR C-130 during MIRAGE-MEX. Airborne NMHCs result from primary emissions whereas airborne OVOCs result from both primary emissions and from the oxidation of NMHC precursors. The photochemical age of air downwind of Mexico City is estimated using an ensemble of VOC measurements and this is compared with back-trajectory estimates. The OVOCs are explored in terms of observed mixing ratios and expected mixing ratios calculated from a box model and from MOZART, a 3-D global chemical transport model. Correlations between various OVOC species, CO, formaldehyde, and NMHCs are examined. Relationships between PAN and acetaldehyde and PPN and propionaldehyde are explored and implications are noted for active photochemistry downwind of Mexico City.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting