Articles | Volume 11, issue 7
Geosci. Model Dev., 11, 2609–2632, 2018
https://doi.org/10.5194/gmd-11-2609-2018
Geosci. Model Dev., 11, 2609–2632, 2018
https://doi.org/10.5194/gmd-11-2609-2018

Development and technical paper 06 Jul 2018

Development and technical paper | 06 Jul 2018

GEM-MACH-PAH (rev2488): a new high-resolution chemical transport model for North American polycyclic aromatic hydrocarbons and benzene

Cynthia H. Whaley et al.

Model code and software

gemdyn and rpnphy repositories Canadian Meteorological Centre https://github.com/mfvalin?tab=repositories

GEM-MACH-PAH, rev2488 C. Whaley, E. Galarneau, P. A. Makar, M. D. Moran, C. Stroud, W. Gong, and S. Gravel https://doi.org/10.5281/zenodo.1162252

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Short summary
We present a new, high-resolution, North American model of PAHs and benzene, which are toxic air pollutants that cause a variety of negative health impacts. Our simulation in a densely populated region of Canada and the U.S. shows that the model is improved over a previous model. The new model is particularly refined regarding the gas–particle partitioning of these pollutants, which has impacts on deposition and inhalation. The simulation was sensitive to the selection of vehicle emissions.