HR: 1340h
AN: A43C-0077    [Abstracts]
TI: Measurements of Non-Methane Hydrocarbons as Oxidant Probes over the Greenland and Norwegian Seas
AU: * Hudson, E D
EM: edward.hudson@mail.mcgill.ca
AF: Departments of Chemistry and Atmospheric and Oceanic Sciences, McGill University, Otto Maass Building, 801 Sherbrooke St. West, Montreal, QC H2T 2W4 Canada
AU: Ariya, P A
EM: parisa.ariya@mcgill.ca
AF: Departments of Chemistry and Atmospheric and Oceanic Sciences, McGill University, Otto Maass Building, 801 Sherbrooke St. West, Montreal, QC H2T 2W4 Canada
AB: Non-methane hydrocarbons (NMHCs) are ubiquitous in the marine troposphere at trace concentrations. They have long been postulated to originate from the degradation of dissolved organic matter (DOM) in surface waters, and furthermore may elucidate the role of various oxidants in the troposphere. Whole air, DOM in surface waters, and organic aerosols were simultaneously sampled on the RV Polarstern ARK-XX cruise in the Greenland and Norwegian seas in the summer of 2004. Initial results focused on the air samples, which were collected in electropolished stainless steel canisters and analyzed for NMHCs using a cryogenic preconcentration-GC apparatus constructed in-house. These NMHC results indicate the relative importance of different oxidants in the air parcels sampled. We will discuss the potential implications for the long-term goal of understanding the processes by which volatile organic compounds may originate from marine DOM.
DE: 0317 Chemical kinetic and photochemical properties
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting