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Regional transport and urban contributions to fine particle concentrations in southeastern Canada.
| Content Provider | Scilit |
|---|---|
| Author | Brook, Jeffrey R. Lillyman, Carrie D. Shepherd, Marjorie F. Mamedov, Alexandre |
| Copyright Year | 2002 |
| Description | The impact of various atmospheric transport directions on ambient fine particle $(PM_{2.5}$) concentrations at several sites in southeastern Canada was estimated (for May-September) using back-trajectory analysis. Three-day back trajectories (four per day) were paired with 6-hr average $PM_{2.5}$ mass concentrations measured using tapered element oscillating microbalances (TEOM). $PM_{2.5}$ concentrations at rural locations in the region were affected by nonlocal sources originating in both Canada and the United States. Comparison of sites revealed that, on average, the local contribution to total $PM_{2.5}$ in the greater Toronto area (GTA) is approximately 30–35%. At each location, average $PM_{2.5}$ concentrations under south/southwesterly flow conditions were 2–4 times higher than under the corresponding northerly flow conditions. The chemical composition of both urban and rural $PM_{2.5}$ was determined during two separate 2-week spring/summer measurement campaigns. Components identified included $SO_{4} ^{2−}$, $NO_{3} ^{−}$, $NH_{4}$+, black carbon and organic carbon (OC), and trace elements. Higher particle mass at the urban Toronto site was composed of a higher proportion of all components. However, black carbon, $NO_{3} ^{−}$, NaCl, and trace elements were found to be the most enriched over the rural/regional background levels. |
| Related Links | http://www.tandfonline.com/doi/pdf/10.1080/10473289.2002.10470821?needAccess=true |
| Ending Page | 866 |
| Page Count | 12 |
| Starting Page | 855 |
| ISSN | 10962247 |
| e-ISSN | 21622906 |
| DOI | 10.1080/10473289.2002.10470821 |
| Journal | Journal of the Air & Waste Management Association |
| Issue Number | 7 |
| Volume Number | 52 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2002-07-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of the Air & Waste Management Association Environmental Sciences Pm2.5 Transport Canada Black No3 Flow Toronto Particle Trajectories Trace flow |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atmospheric Science Pollution Waste Management and Disposal Management, Monitoring, Policy and Law |
