HR: 0830h
AN: A21E-1025    [PDF]
TI: Chemistry of Particles and Selected Trace Gases at Whistler Peak (elevation 2182 m)
AU: * Macdonald, A
EM: annemarie.macdonald@ec.gc.ca
AF: Meteorological Service of Canada, Environment Canada, 4905 Dufferin Street, Toronto, Ont M3H 5T4 Canada
AU: Anlauf, K G
EM: kurt.anlauf@ec.gc.ca
AF: Meteorological Service of Canada, Environment Canada, 4905 Dufferin Street, Toronto, Ont M3H 5T4 Canada
AU: Leaitch, W R
EM: richard.leaitch@ec.gc.ca
AF: Meteorological Service of Canada, Environment Canada, 4905 Dufferin Street, Toronto, Ont M3H 5T4 Canada
AB: A high-elevation measurement site was established in western Canada in spring 2002 and year-round operation will continue through spring 2005. Continuous sampling at this site located at Whistler Mountain, British Columbia (elevation 2182 m) will provide a baseline of background chemistry in the lower free troposphere as well as information on incursions of pollution transported across the Pacific and into North America. Measurements of ozone and CO will be presented for the entire year showing the seasonal cycle in mixing ratios. Ozone distributions will be examined within the context of supporting meteorological data. Comparisons will be made to another Canadian mountaintop site. Aerosol chemical data are available from three periods: April 18 to May 28, 2002; Sept 16 to Nov 23, 2002; and Dec 23, 2002 to May 31, 2003; as either 24-hour samples during the spring periods or 48-hour samples throughout the remainder of the year. Results are presented for a suite of inorganic compounds (Cl$^{-}$, NO$_{3}$$^{-}$, SO$_{4}$$^{=}$, Na$^{+}$, NH$_{4}$$^{+}$, K$^{+}$, Mg$^{2+}$, Ca$^{2+}$) in the particle phase. Preliminary values of particle sulphate show more than 90% of the samples were less than 100 pmole/mole with highest values during the spring period. Particle physical characteristics are also available for Feb to March 2003. During this winter period, continuous size distributions of the particles (10 nm to 20 $\mu$ m) were made and these will be related to the chemical measurements.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting