Dr. John Liggio

Research Scientist - Aerosol chemistry research: Understanding atmospheric processes leading to secondary organic aerosol

4905 Dufferin Street (Toronto, ON)

CURRENT S&T / RESEARCH - Field and laboratory studies of primary aerosol emissions, secondary organic aerosol formation, evolution, transformation and fate; understanding the processes controlling the formation of smog

• Process research on aerosol particle emissions and transformation in the atmosphere through laboratory and field studies
• Ammonia/sulfuric acid/organic aerosol interactions; organosulfate formation in aerosols
• Black carbon emissions from gasoline and diesel vehicles
• Kinetics of heterogeneous reactions and secondary organic aerosol formation; elucidation of new secondary organic aerosol formation mechanisms
• Near roadway measurements of vehicle emissions and their evolution; implications for population exposure
• Aerosol mass spectrometry and chemical mass spectrometry measurements of oxidants and aerosols.

PROFESSIONAL ACTIVITIES / INTERESTS

Collaboration with Health Canada on carbon Nano-tube organic characterization

Collaboration with university colleagues in Canada, US, and Europe

KEY PUBLICATIONS

Liggio, J., Li, S.-M., Vlasenko, A., Stroud, C., and Makar, P. 2011. Depression of ammonia uptake to sulphuric acid aerosols by competing uptake of ambient organic gases, Environ. Sci. Tech., 5 (7), pp 2790–2796, DOI: 10.1021/es103801g

Liggio, J., S.-M. Li, A. Vlasenko, S. Sjostedt, R. Chang, N. Shantz, J. Abbatt, J.G. Slowik, J.W. Bottenheim, P.C. Brickell and W. R. Leaitch. 2010. Primary and Secondary Organic Aerosols in Urban  Air Masses Intercepted at a Rural Site, J. Geophys. Res., 115, D21305, Doi:10.1029/2010JD014426.

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. Atmos. Chem. Phys. Discuss., 11, 3461-3492.

Gordon, M., R. M. Staebler, J. Liggio, A. Vlasenko, S.-M. Li, and K. Hayden. 2010. Aerosol flux measurements above a mixed forest at Borden, Ontario. Atmos. Chem. Phys. Discuss., 10,  22469-22513.

Slowik, J. G. , C. Stroud, J. W. Bottenheim, P. C. Brickell, R. Y.-W. Chang, J. Liggio, P. A. Makar, R. V. Martin, M. D. Moran, N. C. Shantz, S. J. Sjostedt, A. van Donkelaar,    A. Vlasenko, H. A. Wiebe, A. G. Xia, J. Zhang, W. R. Leaitch, and J. P. D. Abbatt. 2010. Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests, Atmos. Chem. Phys., 10, p2825-2845.

Liggio, J. and Li., S. 2008. Reversible and irreversible processing of biogenic olefins on acidic aerosols. Atmos. Chem. Phys., Vol. 8, pp 2039-2055,.

Liggio, J., and S.-M. Li. 2006. Organosulfate Formation During the Uptake of Pinonaldehyde on Acidic Sulfate Aerosols, Geophys. Res. Let., 33, L13808, doi:10.1029/2006GL026079.

Liggio, J., R. McLaren, and S.-M. Li. 2004. Heterogeneous Reactions of Glyoxal on Particulate Matter: Identification of Acetals and Sulfate Esters, Environ. Sci. Technol., 39 (6), 1532-1541.