Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada
Figure 1
(a) Study area including 12 cities in Ontario, Canada, overlaid with the annual mean PM2.5 concentrations (g/m3) derived from satellite measurements between 2001 and 2006 at 0.1° × 0.1° resolution [22]. The Greater Golden Horseshoe and Southwestern Ontario regions are within the area between the dashed line and the boundary of the two countries. (b) PM2.5 distribution over North America from the same data source as in (a). The boxed area approximately indicates the Ohio River Valley region. The blue lines in (a) and white lines in (b) delineate the boundary between Canada and the United States of America (USA) and the state boundaries of USA.
