HR: 0800h
AN: A31B-0844    [Abstracts]
TI: Speciated Organic Aerosol Composition at Chebogue Point, Nova Scotia during ICARTT 2004 using Thermal Desorption Aerosol GC/MS-FID (TAG)
AU: * Williams, B
EM: brentw@nature.berkeley.edu
AF: University of California Berkeley, 247 Hilgard Hall, Berkeley, CA 94703 United States
AU: Goldstein, A
EM: ahg@nature.berkeley.edu
AF: University of California Berkeley, 247 Hilgard Hall, Berkeley, CA 94703 United States
AU: Hering, S
EM: susanne@aerosol.us
AF: Aerosol Dynamics Inc., 935 Grayson St., Berkeley, CA 94710 United States
AU: Kreisberg, N
EM: nathan@aerosol.us
AF: Aerosol Dynamics Inc., 935 Grayson St., Berkeley, CA 94710 United States
AU: White, A
EM: Allen.B.White@noaa.gov
AF: National Oceanic and Atmospheric Administration, NOAA/ETL R/ET7 325 Broadway, Boulder, CO 80305 United States
AU: Allan, J
EM: james.allan@manchester.ac.uk
AF: University of Manchester, Sackville Street Building, Manchester, M60 1QD United Kingdom
AU: Millet, D
EM: millet@eps.harvard.edu
AF: Harvard University, Earth and Planetary Sciences, Cambridge, MA 02138 United States
AB: We report the first ever hourly in-situ measurements of speciated organic aerosol composition. Measurements were made using a novel Thermal desorption Aerosol GC/MS-FID (TAG) instrument that we developed and first deployed during the International Consortium for Atmospheric Research on Transport and Transformation (ICARTT 2004). High time resolution measurements of organic marker compounds allowed us to define several different source types contributing to the aerosols observed at Chebogue Point Nova Scotia, including two major source types from the U.S., Canadian derived aerosol, local biogenic contributions to SOA, and local primary aerosol production. Included in this analysis will be a comparison with the NOAA HYSPLIT model and wind profiler backward trajectories performed over periods of changing particle source regions. Finally, we will compare the typical summertime remote Nova Scotia organic aerosol composition and the typical wintertime urban Berkeley, CA organic aerosol composition to show how the organic fraction of aged particles differs from freshly emitted particles.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 4801 Aerosols (0305, 4906)
DE: 4906 Aerosols (0305, 4801)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005