Journal article

Identifying the sources driving observed PM2.5 temporal variability over Halifax, Nova Scotia, during BORTAS-B

MD Gibson, JR Pierce, D Waugh, JS Kuchta, L Chisholm, TJ Duck, JT Hopper, S Beauchamp, GH King, JE Franklin, WR Leaitch, AJ Wheeler, Z Li, GA Gagnon, PI Palmer



The source attribution of observed variability of total PM2.5 concentrations over Halifax, Nova Scotia, was investigated between 11 July and 26 August 2011 using measurements of PM2.5 mass and PM2.5 chemical composition (black carbon, organic matter, anions, cations and 33 elements). This was part of the BORTAS-B (quantifying the impact of BOReal forest fires on Tropospheric oxidants using Aircraft and Satellites) experiment, which investigated the atmospheric chemistry and transport of seasonal boreal wildfire emissions over eastern Canada in 2011. The US EPA Positive Matrix Factorization (PMF) receptor model was used to determine the average mass (percentage) source contribution over the 4..

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Awarded by Natural Environment Research Council

Funding Acknowledgements

The authors are grateful to Paul Palmer (University of Edinburgh) for funding project consumables via his Philip Leverhulme Prize. The authors would like to thank Health Canada for the loan of the Magee black carbon Aethalometer, Thermo ChemComb samplers, filter weighing and XRF analysis. Many thanks to CD-NOVA for the loan of the Thermo Partisol 2025-Dichotomous sampler. Gratitude to Heather Daurie, Department of Civil and Resources Engineering, Dalhousie University, for analysing the water-soluble metals species. The authors acknowledge the support of Nova Scotia Environment, Air Quality Section, for the provision of comparative air pollution data and general support and advice.