Dr. Craig Stroud

Research Scientist - Chemistry Lead for Air Quality Modelling

Current research and/or projects

Dr. Stroud contributes to the Clean Air Regulatory Agenda (CARA) program by improving the performance of Environment Canada’s research-grade air quality model (AURAMS), used to assess the impact of gas and particle emission reductions on the AQHI.  Dr. Stroud contributes to the Health-related Meteorological program by improving the performance of Environment Canada’s operational air quality forecast model (GEM-MACH), used to provide guidance in AQHI forecasts for Canadians

  • Improving regional-scale organic aerosol predictions across Canada
  • Improving urban-scale predictions of organic aerosol for Canadian cities
  • Modelling the update of ammonia and organic gases to sulphate aerosol
  • Improving biogenic emissions of volatile organic compounds
  • Improving on-road mobile emissions of carbonaceous species

Professional activities / interests

  • external thesis committee examiner for 4 graduate students and mentor for undergraduate students
  • lead author on “Atmospheric Processes” chapter in 2011 Canada Smog Science Assessment
  • lead investigator on 3 awarded PERD Particles proposals: modelling on-road mobile emissions
  • steering committee member of the International Workshop for Air Quality Forecasting Research (IWAQFR), 2009-current
  • author of the MSC/EC air quality forecaster training manual, MOIP Air Quality Modules

Education and awards

B.Sc. (Hons.) Atmospheric Chemistry, Certificate of Meteorology, York University, 1994

Ph.D. Environmental Chemistry, University of Colorado at Boulder, 2000

Advanced Studies Post-Doctoral Fellow, National Center for Atmospheric Research, US, 2001-2004

1991 Merck Frosst Chemistry Award, NSERC (awarded by Prime Minister)

1994 Governor General's Medal, York University (highest undergraduate GPA)

Key publications

Stroud, C. A., Moran, M. D., Makar, P. A., Gong, S., Gong, W., Zhang, J., Slowik, J. G., Abbatt, J. P. D., Lu, G., Brook, J. R., Mihele, C., Li, Q., Sills, D., Strawbridge, K. B., McGuire, M. L., and Evans, G. J., 2012. Evaluation of chemical transport model predictions of primary organic aerosol for air masses classified by particle-component-based factor analysis, Atmos. Chem. Phys., 12, 8297-8321.

Liggio, J., M. Gordon, G. Smallwood, S. -M Li, C. Stroud, R. Staebler, G. Lu, P. Lee, B. Taylor, and J. R. Brook, 2012. Are Emissions of Black Carbon from Gasoline Vehicles Underestimated? Insights from Near and on-Road Measurements, Environmental Science and Technology, 46 (9): 4819-4828.

Gong, W., C. A. Stroud, L. Zhang, 2011. Cloud Processing of Gases and Aerosols in Air Quality Modeling, Atmosphere, 2, 567-616.

Xia, A. G., C. A. Stroud, and P. A. Makar, 2011. Development of a Simple Unified Volatility-Based Scheme (SUVS) for Secondary Organic Aerosol Formation using Genetic Algorithms, Atmospheric Chemistry and Physics ,11 (13): 6185-6205.

Liggio, J., S. -M Li, A. Vlasenko, C. Stroud, and P. Makar, 2011. Depression of Ammonia Uptake to Sulfuric Acid Aerosols by Competing Uptake of Ambient Organic Gases, Environmental Science and Technology, 45 (7): 2790-2796.

Makar, P. A., J. Zhang, W. Gong, C. Stroud, D. Sills, K. L. Hayden, J. Brook, et al., 2010. Mass Tracking for Chemical Analysis: The Causes of Ozone Formation in Southern Ontario during BAQS-Met 2007,  Atmospheric Chemistry and Physics, 10 (22): 11151-11173.

Stroud, C., P. Makar, T. Karl, A. Guenther, C. Geron, A. Turnipseed, E. Nemitz, B. Baker, M. Potosnak, and J. D. Fuentes. 2005. Role of canopy-scale photochemistry in modifying biogenic-atmosphere exchange of reactive terpene species: Results from the CELTIC field study. Journal of Geophysical Research D: Atmospheres 110, (17): 149-162.

Stroud, C. A., A. Nenes, J. L. Jimenez, P. F. DeCarlo, J. A. Huffman, R. Bruintjes, and E. Nemitz, et al. 2007. Cloud activating properties of aerosol observed during CELTIC. Journal of the Atmospheric Sciences 64, (2): 441-459.

Stroud, C. A., P. A. Makar, M. D. Moran, W. Gong, S. Gong, J. Zhang, K. Hayden, et al., 2011. Impact of Model Grid Spacing on Regional- and Urban- Scale Air Quality Predictions of Organic Aerosol, Atmospheric Chemistry and Physics, 11 (7): 3107-3118.

C.A. Stroud, P. Makar, M. Mozurkewich, D. Hastie, D.V. Michelangeli,  ‘Simulating Organic Aerosol Formation during the Photo-oxidation of Toluene/NOx Mixtures: Comparing the Equilibrium and Kinetic Assumption’, Environ. Sci. Technol., 38, 1471-1479, 2004.

Li, S. -M, J. Liggio, L. Graham, G. Lu, J. Brook, C. Stroud, J. Zhang, P. Makar, and M. D. Moran, 2011.

Condensational Uptake of Semivolatile Organic Compounds in Gasoline Engine Exhaust Onto Pre-Existing Inorganic Particles, Atmospheric Chemistry and Physics, 11 (19): 10157-10171.

Slowik, J. G., C. A. Stroud, J. W. Bottenheim, P. C. Brickell, R. Y. -W Chang, J. Liggio, P. A. Makar et al., 2010. Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests. Atmos. Chem. Phys., 10 (6), 2825-2845. [39 citations]

Liggio, J, S.M. Li, A. Vlasenko, S. Sjostedt, R. Chang, N. Shantz, J. Abbatt, J.G. Slowik, J.W. Bottenheim, P.C. Brickell, C.A. Stroud, and W.R. Leaitch, 2010. Primary and Secondary Organic Aerosols in Urban Air Masses Intercepted at a Rural Site, JGR-Atmospheres, 115 (21), art. no. D21305.

Stroud, C. A., G. Morneau, P. A. Makar, M. D. Moran, W. Gong, B. Pabla, J. Zhang, et al. 2008. OH-reactivity of volatile organic compounds at urban and rural sites across Canada: Evaluation of air quality model predictions using speciated VOC measurements. Atmospheric Environment 42, (33): 7746-7756.

Stroud, C.A., S. Madronich, E. Atlas, C. Cantrell, A. Fried, B.Wert, B. Ridley, F. Eisele, L. Mauldin, R. Shetter, B. Lefer, F. Flocke, A. Weinheimer, M. Coffey, B. Heikes, R. Talbot, D. Blake, ‘Photochemistry in the arctic free troposphere: NOx budget and the role of reservoir cycling’, Atmos. Environ., 37, 3351-3364, 2003.

Stroud, C.A., S. Madronich, E. Atlas, C. Cantrell, A. Fried, B.Wert, B. Ridley, F. Eisele, L. Mauldin, R. Shetter, B. Lefer, F. Flocke, A. Weinheimer, M. Coffey, B. Heikes, R. Talbot, D. Blake, ‘Photochemistry in the arctic free troposphere: Ozone budget and its dependence on nitrogen oxides and the production rate of free radicals’, J. Atmos. Chem., 47 (2): 107-138, 2004.

Research facility

4905 Dufferin Street
Toronto, ON M3H 5T4


Research Scientist III, Air Quality Modelling and Integration, Air Quality Research Division

Adjunct Professor at the University of Waterloo, Department of Chemistry