Global modeling of the climatology and optical properties of multicomponent aerosol species

ENVR 2

Tarek Ayash, tarek.ayash@utoronto.ca1, Charles Q. Jia, cqjia@chem-eng.utoronto.ca1, Sunling L. Gong, Sunling.Gong@ec.gc.ca2, Tian Liang Zhao2, and Ping Huang2. (1) Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada, (2) Air Quality Research Branch, Meteorological Service of Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4
Using the Canadian Aerosol Module (CAM), with the Third Generation Canadian Climate Center General Circulation Model (CCC GCM III) as its climatological driver, the global climatology of aerosols are simulated and compared to measured aerosol concentrations. Adding an aerosol optical module to this modeling framework, the global optical properties of aerosols are simulated and compared to sun-photometer and satellite observations. Overall, fairly good agreement was found between model simulations and sun-photometer and satellite retrievals, particularly over tropical oceans where most models show significant underestimation. While comparison to observed concentrations suggests model underestimation of dust and carbonaceous emissions, comparison to observed optical properties shows good agreement over dust regions but over-prediction of modeled organic-carbon contribution.
 

Atmospheric Aerosol Processes
8:30 AM-11:45 AM, Sunday, August 19, 2007 Boston Park Plaza -- Stanbro Rm, Oral

Division of Environmental Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007