HR: 0800h
AN: A21A-0830    [Abstracts]
TI: Hydro- and Halocarbon Oxidation in the New England Coastal Summer Atmosphere
AU: * Pszenny, A
EM: alex.pszenny@unh.edu
AF: University of New Hampshire, Climate Change Research Center, EOS, Morse Hall, Durham, NH 03824 United States
AU: * Pszenny, A
EM: alex.pszenny@unh.edu
AF: Mount Washington Observatory, P.O. Box 2310, North Conway, NH 03860 United States
AU: Fischer, E
EM: efischer@mountwashington.org
AF: Mount Washington Observatory, P.O. Box 2310, North Conway, NH 03860 United States
AU: Keene, W
EM: wck@virginia.edu
AF: University of Virginia, Department of Environmental Sciences, Clark Hall, Charlottesville, VA 22904 United States
AU: Senff, C
EM: christoph.senff@noaa.gov
AF: NOAA Environmental Technology Laboratory, R/ET7, 325 Broadway, Boulder, CO 80305 United States
AU: Sive, B
EM: bcs@gust.sr.unh.edu
AF: University of New Hampshire, Climate Change Research Center, EOS, Morse Hall, Durham, NH 03824 United States
AU: Talbot, R
EM: robert.talbot@unh.edu
AF: University of New Hampshire, Climate Change Research Center, EOS, Morse Hall, Durham, NH 03824 United States
AU: Varner, R
EM: ruth.varner@unh.edu
AF: University of New Hampshire, Climate Change Research Center, EOS, Morse Hall, Durham, NH 03824 United States
AU: White, A
EM: allen.b.white@noaa.gov
AF: NOAA Environmental Technology Laboratory, R/ET7, 325 Broadway, Boulder, CO 80305 United States
AB: Measurements of HCl and other inorganic chlorine gases at Appledore Island, Maine (42.98708N, 70.61539W, 43m ASL) made as part of the Chemistry of Halogens at the Isles of Shoals (CHAiOS) component of the July-August 2004 ICARTT intensive suggest that greater than 100,000 Cl atoms per cubic centimeter may have been present at times (J. Stutz et al., this session). Hydrocarbon data obtained over the Gulf of Maine from NOAA Ship Ronald H. Brown during the ICARTT intensive also suggest the possibility of active Cl chemistry occurring in surface air that had been over water for a day or more (P. Goldan, et al., this session). Here, data for 51 non-methane hydrocarbons and 12 halocarbons from hourly canister samples collected at the Appledore Island site will be examined for evidence of oxidation by Cl. Exposure to Cl will be estimated for each canister sample based on local meteorology and on over-water transit times determined using 36-hour surface air back trajectories calculated from regional NOAA/ETL profiler network data and from ocean buoy data from the Gulf of Maine and adjacent waters.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005