HR: 0800h
AN: A41A-0003    [Abstracts]
TI: Secondary Organic Aerosol Yield Parameterizations for Regional Air Quality Modelling
AU: * Stroud, C A
EM: craig.stroud@ec.gc.ca
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Makar, P A
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Moran, M D
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Bouchet, V S
AF: Canadian Meteorological Centre Meteorological Service of Canada, 2121 Trans-Canada Highway, Dorval, QC H9P1J3 Canada
AU: Dastoor, A P
AF: Air Quality Research Branch Meteorological Service of Canada, 2121 Trans-Canada Highway, Dorval, QC H9P1J3 Canada
AU: Gong, S L
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Gong, W
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Pabla, B
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AU: Venkatesh, S
AF: Air Quality Research Branch Meteorological Service of Canada, 4905 Dufferin Street, Downsview, ON M3H 5T4 Canada
AB: A new secondary organic aerosol parameterization based on the Jiang (2004) instantaneous organic aerosol yield (IAY) approach was implemented into the AES Unified Regional Air Quality Modelling System (AURAMS). Results will be presented comparing the new parameterization with the Odum et al. (1997) overall organic aerosol yield (OAY) approach traditionally implemented into regional air quality models. A comparison on a western North American domain suggests a significant increase in modelled organic aerosol concentrations with the new IAY approach in better agreement with measurements collected during the PACIFIC 2001 field program. A model assessment of the primary versus secondary contribution to organic aerosol for the western North American domain will also be presented illustrating the importance of secondary anthropogenic production in the Lower Fraser Valley and secondary biogenic production over the Canadian alpine and boreal forests.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0320 Cloud physics and chemistry
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting