HR: 15:10h
AN: A13E-07 [Abstracts]
TI: Evaluation of the Significance of the Organic Components within Marine Aerosols and their Impact on
Aerosol Hygroscopicity and Cloud Droplet Activity during the CARMA III Field Campaign
AU: * Crahan, K K
EM: katie@atmos.washington.edu
AF: University of Washington, Box 351640
Dept. Atmospheric Sciences, Seattle, WA 98195
United States
AU: Hegg, D
EM: deanhegg@atmos.washigton.edu
AF: University of Washington, Box 351640
Dept. Atmospheric Sciences, Seattle, WA 98195
United States
AU: Covert, D
EM: dcovert@atmos.washington.edu
AF: University of Washington, Box 351640
Dept. Atmospheric Sciences, Seattle, WA 98195
United States
AU: Jonsson, H
EM: hjonsson@nps.navy.mil
AF: CIRPAS, 3200 Imjin Road
Hanger 507, Marina, CA 93933
United States
AU: Liu, Y
EM: yong.liu@pnl.gov
AF: Batelle, 3335 Q Ave
EMSL 1153, Richland, WA 99354
United States
AB:
The Cloud and Aerosol Research in the Marine Atmosphere III (CARMA III) field campaign took place during August, 2005 off the
coast of Monterey, California, exploring the relationship between the marine aerosol chemical, physical and optical
properties and those of the overlying stratocumulus deck. The oceanic upwelling offshore of California also provides
nutrients to support large phytoplankton blooms, a major natural source of primary organic matter found in marine aerosols.
Previous field campaigns in the region identified on average 22% of the chemically resolved mass as organic, and 7% on
average was insoluble organic material. However, the impact of the organic matter on aerosol properties remains unclear.
The organic composition of the marine aerosols observed during CARMA III will be explored using several different laboratory
techniques, including a novel analysis of individual aerosols using Scanning Electron Microscopy and Total Electron
Microscopy (SEM/TEM). Additionally, the relationship between the organic material and aerosol hygroscopicity and cloud
condensation nuclei activity will be explored.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005