HR: 0800h
AN: A51E-0129    [Abstracts]
TI: Organic Aerosols: A Potential Source of Oxygenated Volatile Organic Compounds
AU: * Kwan, A J
EM: kwan@caltech.edu
AF: Department of Environmental Science and Engineering, California Institute of Technology, MS 100-23, Pasadena, CA 91125 United States
AU: Crounse, J D
EM: crounjd@caltech.edu
AF: Department of Chemistry, California Institute of Technology, MS 150-21, Pasadena, CA 91125 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: Department of Environmental Science and Engineering, California Institute of Technology, MS 100-23, Pasadena, CA 91125 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: Department of Chemistry, California Institute of Technology, MS 150-21, Pasadena, CA 91125 United States
AB: Numerous laboratory studies have demonstrated that organic surfaces are readily oxidized by O₃ and OH, in many cases producing oxygenated volatile organic compounds (OVOC) such as aldehydes and organic acids. Because many aerosols possess organic coatings, it is possible that oxidation of organic aerosol surfaces could provide a significant flux of OVOC into the troposphere that is not accounted for in current models. From data collected on the NASA DC-8 during INTEX-NA over North America in the summer of 2004 (part of ICARTT -- the International Consortium for Atmospheric Research on Transport and Transformation), we estimate the potential flux of OVOC from organic aerosol oxidation, and discuss its implications for our understanding of atmospheric photochemistry.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005