HR: 11:20h
AN: A41F-05    [PDF]
TI: The Photochemical Impact of Oceanic Hydrocarbons on the Atmospheric Marine Boundary Layer over the Gulf of Maine
AU: * Wingenter, O W
EM: Oliver@nmt.edu
AF: Department of Chemistry,New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801 United States
AU: Haase, K B
EM: holstien@nmt.edu
AF: Department of Chemistry,New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801 United States
AU: Harlow, A
EM: aharlow@nmt.edu
AF: Department of Chemistry,New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, NM 87801 United States
AU: Chen, G
EM: Gao.Chen-1@nasa.gov
AF: NASA, Langley Research Center, Hampton, VA 23681-0001 United States
AU: Williams, E
EM: eric@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: Jakoubek, R
EM: jakoubek@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305 United States
AU: Sive, B C
EM: bcs@ccrc.sr.unh.edu
AF: Climate Change Research Center, Institute for the Study of Earth, Oceans and Space,, University of New Hampshire, Durham, NH 03824 United States
AB: The concentrations of nonmethane hydrocarbons (NMHCs), halocarbons, and alkyl nitrates were quantified in situ from the surface air and water aboard the NOAA R/V Ronald H. Brown during the New England Air Quality Study (NEAQS) using gas chromatography with flame ionization and electron capture detection. The highly reactive alkenes, ethene, propene, trans-2-butene, 1-butene, isobutene, cis-2-butene, and isoprene were always supersaturated in the coastal waters. The measured air and water concentrations were used along with air-sea gas exchange relationships to determine the sea-air flux of these alkenes. The fluxes served as input into a photochemical box model to assess the impact of marine hydrocarbons on local photochemistry, specifically ozone formation and destruction, under clean marine conditions. This study helps to establish coastal baseline conditions so that the magnitude of the impact on air quality under polluted condition can be put into context.
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting