HR: 0800h
AN: A51D-0731    [Abstracts]
TI: Constraining the budget of DMS in the remote marine boundary layer - results from the Pacific Atmospheric Sulfur Experiment (PASE)
AU: * Conley, S A
EM: saconley@ucdavis.edu
AF: University of California, Davis, Land and Water Resources (PES) 1 Shields Avenue, Davis, CA 95616, United States
AU: Faloona, I C
EM: icfaloona@ucdavis.edu
AF: University of California, Davis, Land and Water Resources (PES) 1 Shields Avenue, Davis, CA 95616, United States
AU: Bandy, A R
EM: bandyar@drexel.edu
AF: Drexel University, Chemistry 32 South 32nd Street, Philadelphia, PA 19104, United States
AU: Howell, S G
EM: sghowell@hawaii.edu
AF: University of Hawaii at Manoa, 2500 Campus Road, Honolulu, HI 96822, United States
AU: Blomquist, B W
EM: blomquis@hawaii.edu
AF: University of Hawaii at Manoa, 2500 Campus Road, Honolulu, HI 96822, United States
AU: Huebert, B J
EM: huebert@hawaii.edu
AF: University of Hawaii at Manoa, 2500 Campus Road, Honolulu, HI 96822, United States
AU: Simpson, R M
EM: rmcs@hawaii.edu
AF: University of Hawaii at Manoa, 2500 Campus Road, Honolulu, HI 96822, United States
AU: Zhuang, J
EM: zhuang@soest.hawaii.edu
AF: University of California, Davis, Land and Water Resources (PES) 1 Shields Avenue, Davis, CA 95616, United States
AU: Mauldin, L R
EM: mauldin@ucar.edu
AF: NCAR, Foothills Lab 0 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Anderson, R
EM: rsa@ucar.edu
AF: NCAR, Foothills Lab 0 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Koschiuch, E
EM: koschiuch@ucar.edu
AF: NCAR, Foothills Lab 0 3450 Mitchell Lane, Boulder, CO 80301, United States
AU: Wade, T
EM: timmywade@comcast.net
AF: Drexel University, Chemistry 32 South 32nd Street, Philadelphia, PA 19104, United States
AB: The Pacific Atmosphere Sulfur Experiment (PASE) investigated the chemistry of sulfur in the remote, unpolluted marine boundary layer of the equatorial Pacific. The experiment was conducted in the vicinity of Christmas Island (2N, 157W) using the NCAR C-130 aircraft. High rate (25 Hz) measurements of DMS, SO2 and wind speeds were made along with low rate measurements of OH, HO2, aerosol size spectra, and other species. The flights were typically flown at altitudes corresponding to the surface layer, middle and top of the boundary layer, as well as the buffer layer above (where most of the trade wind cumulus resided). Horizontal and vertical fluxes were measured to constrain the scalar budgets of DMS and SO2. Preliminary results suggest a large and persistent sink of DMS in addition to reaction with OH. Reactions of DMS with BrO and Cl are considered as potential candidates with concentrations estimated from bromine and chlorine depletion in sampled sea salt particles.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting