Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada
This study examines meteorological impacts on seasonal variation of fine particulate matter (PM2.5) in southern Ontario, Canada. After analyzing PM2.5 data at 12 cities in the region in 2006, we found that PM2.5 concentrations were 30–40% higher in summer (7–15 μg/m3) than in winter (4–11 μg/m3). Hi...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2014/169476 |
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| author | Jane Liu Siliang Cui |
| author_facet | Jane Liu Siliang Cui |
| author_sort | Jane Liu |
| collection | DOAJ |
| description | This study examines meteorological impacts on seasonal variation of fine particulate matter (PM2.5) in southern Ontario, Canada. After analyzing PM2.5 data at 12 cities in the region in 2006, we found that PM2.5 concentrations were 30–40% higher in summer (7–15 μg/m3) than in winter (4–11 μg/m3). High PM2.5 episodes occurred more frequently in warmer seasons. Analyses of surface meteorology, weather maps, and airflow trajectories suggest that these PM2.5 episodes were often related to synoptic transport of pollutants from highly polluted areas in the United States. The southerly or southwesterly winds associated with midlatitude cyclones play an important role in such transport. A typical weather pattern favoring the transport is suggested. When it was hot, humid, and stagnant with southerly or southwesterly winds, the likelihood of high PM2.5 occurrences was high. The Greater Golden Horseshoe and Southwestern Ontario regions had higher PM2.5 (6–12 μg/m3 annually) than the northern region (4–6 μg/m3), reflecting combined effects of meteorology, regional transport, and local emissions. In the future, PM2.5 transport from the United States will likely increase in abundance because of possible prolonged accumulation at the pollution sources as the frequency of the midlatitude cyclones may reduce under climate change. |
| format | Article |
| id | doaj-art-79e6aec8eebb4083a32cdf26774cfb52 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-79e6aec8eebb4083a32cdf26774cfb522025-08-20T03:35:47ZengWileyAdvances in Meteorology1687-93091687-93172014-01-01201410.1155/2014/169476169476Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, CanadaJane Liu0Siliang Cui1Department of Geography and Program in Planning, University of Toronto, 100 St. George Street, Toronto, ON, M5S 3G3, CanadaDepartment of Geography and Program in Planning, University of Toronto, 100 St. George Street, Toronto, ON, M5S 3G3, CanadaThis study examines meteorological impacts on seasonal variation of fine particulate matter (PM2.5) in southern Ontario, Canada. After analyzing PM2.5 data at 12 cities in the region in 2006, we found that PM2.5 concentrations were 30–40% higher in summer (7–15 μg/m3) than in winter (4–11 μg/m3). High PM2.5 episodes occurred more frequently in warmer seasons. Analyses of surface meteorology, weather maps, and airflow trajectories suggest that these PM2.5 episodes were often related to synoptic transport of pollutants from highly polluted areas in the United States. The southerly or southwesterly winds associated with midlatitude cyclones play an important role in such transport. A typical weather pattern favoring the transport is suggested. When it was hot, humid, and stagnant with southerly or southwesterly winds, the likelihood of high PM2.5 occurrences was high. The Greater Golden Horseshoe and Southwestern Ontario regions had higher PM2.5 (6–12 μg/m3 annually) than the northern region (4–6 μg/m3), reflecting combined effects of meteorology, regional transport, and local emissions. In the future, PM2.5 transport from the United States will likely increase in abundance because of possible prolonged accumulation at the pollution sources as the frequency of the midlatitude cyclones may reduce under climate change.http://dx.doi.org/10.1155/2014/169476 |
| spellingShingle | Jane Liu Siliang Cui Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada Advances in Meteorology |
| title | Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada |
| title_full | Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada |
| title_fullStr | Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada |
| title_full_unstemmed | Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada |
| title_short | Meteorological Influences on Seasonal Variation of Fine Particulate Matter in Cities over Southern Ontario, Canada |
| title_sort | meteorological influences on seasonal variation of fine particulate matter in cities over southern ontario canada |
| url | http://dx.doi.org/10.1155/2014/169476 |
| work_keys_str_mv | AT janeliu meteorologicalinfluencesonseasonalvariationoffineparticulatematterincitiesoversouthernontariocanada AT siliangcui meteorologicalinfluencesonseasonalvariationoffineparticulatematterincitiesoversouthernontariocanada |