Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.a32c..06x&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #A32C-06
Other
0317 Chemical Kinetic And Photochemical Properties
Scientific paper
The City of Windsor is located in south-western Ontario. The city is dominated by the manufacturing and assembly of vehicles and vehicle parts. Windsor is also under heavy influence of air pollution from vehicular sources. As a result, Windsor has significant fresh emissions of a number of air containments. Furthermore,transboundary air pollution is a major pollution source for Windsor, which is located downwind of Detroit, MI and the Ohio valley. Hence Windsor observations are characterized by local emissions superimposed on the regional levels, which provide a unique opportunity to study local emission sources versus long-range transport in an urban settling. This study investigates to what extent local air quality depends on local emission sources versus long-range transport. Data collected during the BAQS-MET 2007 study have been analyzed. Large day to day variability was observed in most pollutants at the University of Windsor. NO, NO2, NOx are highly correlated, as expected. High correlation between PM1, PP2.5 and PM10 was also observed. Furthermore, the mass concentrations of PM1 were very close to that of PM2.5 and PM10 most times, suggesting the the particulate matter is dominated by primary fine mode emissions or gas to particle transformation near the site. The number concentrations of ultra fine particles track the PM1 mass concentrations on several days, indicating regional contributions to fine PM through transport and transformation. Other studies have found high correlation between SO2 and total gaseous mercury, suggesting coal fired power plants as the major sources. However, in this study correlation between SO2 and total gaseous mercury is relatively poor, demonstrating complex source-receptor relationships. Spatial variability of elemental carbon measurements shows significant local source contributions in comparison with organic carbon and ozone. The regional effects of Hg and other secondary pollutants were also studied by comparing University of Windsor measurements with that of other more rural sites in the region during the BAQS-MET field campaign. The results indicated a significant local component in some pollutants, while for others regional effects are predominant.
Akhtar U.
Ali Abbas
Brook Jeffrey R.
Lu Gang
Marchand Régine
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