HR: 1340h
AN: A33A-0818    [Abstracts]
TI: Airborne Formaldehyde Measurements Onboard the NASA DC-8 Aircraft During the 2006 INTEX-B Campaign by Tunable Diode Laser Absorption Spectroscopy
AU: * Fried, A
EM: fried@ucar.edu
AF: Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Walega, J G
EM: walega@ucar.edu
AF: Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Weibring, P
EM: weibring@ucar.edu
AF: Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Richter, D
EM: dr@ucar.edu
AF: Earth Observing Laboratory, National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States
AB: The 2006 Intercontinental Chemical Transport Experiment Phase B (INTEX-B) Campaign was designed in part to quantify the outflow and evolution of gases and aerosols from aging plumes downwind of major tropical megacities such as Mexico City. Formaldehyde (CH2O), an important reactive gas phase intermediate, is photochemically produced as such plumes age and is involved in a number of important atmospheric processes, such as: hydrocarbon oxidation, ozone production, reactive hydrogen radical formation, and generation of carbon monoxide. This talk will present CH2O results acquired by a tunable diode laser absorption spectrometer operated onboard the NASA DC-8 aircraft during this campaign. Airborne CH2O distributions and measurement- model comparisons over a wide geographic region of this study, including Mexico, the Gulf of Mexico, and vast regions over the Pacific Ocean during the second campaign phase, will be presented. Comparisons and contrasts with results from other major metropolitan areas will also be discussed.
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting