Articles | Volume 20, issue 5
Atmos. Chem. Phys., 20, 2911–2925, 2020
Atmos. Chem. Phys., 20, 2911–2925, 2020

Research article 11 Mar 2020

Research article | 11 Mar 2020

How much does traffic contribute to benzene and polycyclic aromatic hydrocarbon air pollution? Results from a high-resolution North American air quality model centred on Toronto, Canada

Cynthia H. Whaley et al.

Model code and software

GEM-MACH-PAH, rev2488 C. Whaley, E. Galarneau, P. Makar, M. Moran, C. Stroud, W. Gong, and S. Gravel

Short summary
Benzene and polycyclic aromatic compounds are toxic air pollutants and ubiquitous in the environment. Using a chemical transport model, we have determined the net impact of vehicle emissions on ambient concentrations of these species. Traffic emissions were found to be a significant fraction of ambient pollution in the densely populated modelled region of North America. Our simulations demonstrate the air quality benefits that would result from transitioning to a zero-emission vehicle fleet.
Final-revised paper