HR: 0800h
AN: A21A-0832    [Abstracts]
TI: Aerosol Particle Growth Events during ICARTT 2004 at Appledore Island
AU: * Russell, L M
EM: lmrussell@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, San Diego 9500 Gilman Dr. Mail Code 0221, La Jolla, CA 92093 United States
AU: Mensah, A
EM: amensah@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, San Diego 9500 Gilman Dr. Mail Code 0221, La Jolla, CA 92093 United States
AU: Keene, W
A21A-0832 AF: University of Virginia, Department of Environmental Sciences, Charlottesville, VA 22904 United States
AU: Sive, B
A21A-0832 AF: University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Durham, NH 03824 United States
AU: Varner, R
A21A-0832 AF: University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Durham, NH 03824 United States
AU: Von Glasow, R
A21A-0832 AF: University of Heidelberg, Institute for Environmental Physics, Heidelberg, HE 69120 Germany
AU: Pechtl, S
A21A-0832 AF: University of Heidelberg, Institute for Environmental Physics, Heidelberg, HE 69120 Germany
AU: Stutz, J
A21A-0832 AF: University of California, Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, CA 90095 United States
AU: Fisher, E
A21A-0832 AF: Mount Washington Observatory, 2779 White Mountain Highway P.O. Box 2310, North Conway, NH 03860 United States
AU: Pszenny, A
A21A-0832 AF: University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Durham, NH 03824 United States
AU: Pszenny, A
A21A-0832 AF: Mount Washington Observatory, 2779 White Mountain Highway P.O. Box 2310, North Conway, NH 03860 United States
AB: One of the goals of Chemistry of Halogens at the Isles of Shoals (CHAiOS) is understanding the relationship between gas-phase precursors and aerosol formation and growth. There were more than fifteen events with significant particle concentrations at diameters less than 20 nm. Of these, fifteen show a consistent increase in particle size over several hours of steady meteorological conditions. Most of these growth events were first detected at approximately 8:00 am local time, indicating a possible correlation with photochemistry. The calculated growth rates range from 3.9 to 15 nm hr^-1 with an average of 6.4 nm hr^-1. Simultaneous measurements of criteria pollutants, oxidants and halogens revealed high background concentrations that were characteristic of continental air masses. The results show that production and growth of new particles are controlled by multiple processes and precursors. Most events occur on days with high concentrations of biogenic volatile organic compounds.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0322 Constituent sources and sinks
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005