HR: 0800h
AN: A51C-0584    [Abstracts]
TI: Measurements of Molecular Halogens on the California Coast
AU: * Sumner, A L
EM: sumnera@battelle.org
AF: Battelle, 505 King Ave., Columbus, OH 43201, United States
AU: Gregg, A M
EM: gregga@battelle.org
AF: Battelle, 505 King Ave., Columbus, OH 43201, United States
AU: Mangaraj, R
EM: mangaraj@battelle.org
AF: Battelle, 505 King Ave., Columbus, OH 43201, United States
AB: Although the hydroxyl radical is generally considered to be the dominant daytime oxidizing species in the troposphere, there is increasing evidence that halogen atoms are also significant oxidants in coastal areas. The importance of reactive halogen species (RHS), such as chlorine atoms and bromine and iodine oxides, is not well characterized, partly due to the few observations of RHS in the atmosphere. A collaborative field measurement campaign was conducted in October 2006 in Malibu, CA to measure a suite of trace gases, including halogen molecules, halogen oxides, Cl + VOC reaction products, aerosol composition, ozone, nitrogen oxides, carbon monoxide, and others. An atmospheric pressure ionization mass spectrometer was used to detect molecular bromine and iodine in the marine boundary layer during that field experiment. The results of those measurements are presented here.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting