HR: 08:00h
AN: A11C-01 INVITED     [Abstracts]
TI: A Molecular Level View of Sea Salt Chemistry in the Troposphere
AU: * Finlayson-Pitts, B J
EM: bjfinlay@uci.edu
AF: University of California Irvine, Department of Chemistry, University of California Irvine, Irvine, CA 92697-2025 United States
AB: Many field studies over the past several decades have established the importance of halogen chemistry in the troposphere. However, there are a number of puzzling field observations that are inconsistent with known chemistry in the gas and bulk aqueous phases. This highlights the need to understand the chemistry on a molecular level, in order to accurately model the results of field experiments and understand the impact of halogens on tropospheric chemistry. The results of recent laboratory studies suggest that, under some circumstances, unique chemistry at the air-water interface contributes to activation of halide ions into photochemically active halogen compounds that serve as sources of gaseous halogen atoms in the troposphere. The results of recent mechanistic and kinetics studies of interface reactions and the implications for their potential contributions to the chemistry of atmospheric halogens will be presented.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0317 Chemical kinetic and photochemical properties
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005