HR: 10:50h
AN: A52B-02 [Abstracts]
TI: Exploring the Missing Link(s): Insights Into Unmeasured Reactive Chemical Species in Forested
Environments
AU: * Apel, E C
EM: apel@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, 1850 Table Mesa Dr., Boulder,
CO 80305
United States
AU: Geron, C
EM: Geron.chris@epa.gov
AF: U.S. Environmental Protection Agency, National Risk Management Research Laboratory, 109 TW Alexander
Dr., Research Triangle Pk, NC 27711
United States
AU: Guenther, A
EM: guenther@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, 1850 Table Mesa Dr., Boulder,
CO 80305
United States
AU: Karl, T
EM: tomkarl@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, 1850 Table Mesa Dr., Boulder,
CO 80305
United States
AU: Harley, P
EM: harley@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, 1850 Table Mesa Dr., Boulder,
CO 80305
United States
AU: Riemer, D D
EM: driemer@rsmas.miami.edu
AF: University of Miami, Rosenstiel School of Marine and Atmopheric Sciences, 4600 Rickenbacker Causeway,
Miami, FL 33149
United States
AB:
Indirect evidence for missing (unmeasured) reactive hydrocarbons in forests has recently been presented in the literature;
researchers employing independent and unrelated reactivity measurements arrived at similar conclusions. If their
interpretations are correct, then conventional measurements are missing a significant portion of the total reactive
hydrocarbons present in these environments. This presentation will explore the full set of speciated monoterpene and grouped
monoterpene measurements that were obtained at the PROPHET site in northern Michigan for clues to missing reactivity and the
relative importance of various nighttime oxidants. Recent progress in quantifying hard to measure low volatility reactive
biogenic compounds will be discussed as well as progress in estimating emission factors for selected species. Implications of
these recent findings for our current understanding of chemistry in forested environments will be discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
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