Jihyun Han, KEI Korea Environment Institute, Sejong, South Korea, Changsub Shim, Korea Environment Institute, Sejong, Korea, Republic of (South), Daven K Henze, University of Colorado Boulder, Boulder, CO, United States, Mark Shephard, Environment and Climate Change Canada, Toronto, Canada, Shailesh Kharol, Dalhousie University, Halifax, NS, Canada, Enrico Dammers, Environment and Climate Change Canada, Air Quality Research Division, Toronto, ON, Canada and Karen Cady-Pereira, Atmospheric and Environmental Research, Lexington, MA, United States