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Volume 17, issue 22 | Copyright
Atmos. Chem. Phys., 17, 14119-14143, 2017
https://doi.org/10.5194/acp-17-14119-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 28 Nov 2017

Research article | 28 Nov 2017

Long-path measurements of pollutants and micrometeorology over Highway 401 in Toronto

Yuan You et al.
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Akagi, S. K., Yokelson, R. J., Burling, I. R., Meinardi, S., Simpson, I., Blake, D. R., McMeeking, G. R., Sullivan, A., Lee, T., Kreidenweis, S., Urbanski, S., Reardon, J., Griffith, D. W. T., Johnson, T. J., and Weise, D. R.: Measurements of reactive trace gases and variable O3 formation rates in some South Carolina biomass burning plumes, Atmos. Chem. Phys., 13, 1141–1165, https://doi.org/10.5194/acp-13-1141-2013, 2013.
Akagi, S. K., Burling, I. R., Mendoza, A., Johnson, T. J., Cameron, M., Griffith, D. W. T., Paton-Walsh, C., Weise, D. R., Reardon, J., and Yokelson, R. J.: Field measurements of trace gases emitted by prescribed fires in southeastern US pine forests using an open-path FTIR system, Atmos. Chem. Phys., 14, 199–215, https://doi.org/10.5194/acp-14-199-2014, 2014.
Andreas, E. L.: Uncertainty in a path-averaged measurement of the friction velocity u, J. Appl. Meteorol., 31, 1312–1321, 1992.
Baker, A. K., Beyersdorf, A. J., Doezema, L. A., Katzenstein, A., Meinardi, S., Simpson, I. J., Blake, D. R., and Sherwood Rowland, F.: Measurements of nonmethane hydrocarbons in 28 United States cities, Atmos. Environ., 42, 170–182, https://doi.org/10.1016/j.atmosenv.2007.09.007, 2008.
Baldauf, R., Thoma, E., Hays, M., Shores, R., Kinsey, J., Gullett, B., Kimbrough, S., Isakov, V., Long, T., Snow, R., Khlystov, A., Weinstein, J., Chen, F.-L., Seila, R., Olson, D., Gilmour, I., Cho, S.-H., Watkins, N., Rowley, P., and Bang, J.: Traffic and meteorological impacts on near-road air quality: Summary of methods and trends from the Raleigh near-road study, J. Air Waste Manage., 58, 865–878, https://doi.org/10.3155/1047-3289.58.7.865, 2008.
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A novel approach for traffic emission measurements is shown to have the capacity to provide high-time-resolution accurate concentrations of key air pollutants. A top-down method for quantifying real-world emission rates produced vehicular emission factor estimates for carbon monoxide that agreed well with bottom-up values. Significant ammonia and hydrogen cyanide emissions were observed. The main factors modulating the concentrations were turbulent mixing and traffic density.
A novel approach for traffic emission measurements is shown to have the capacity to provide...
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