Debora Griffin¹, Chris A McLinden¹, Enrico Dammers¹, Chris Sioris¹, Jack Chen², Cristen Adams³, Junhua Zhang¹, Vitali E. Fioletov¹, Nickolay Anatoly Krotkov⁴ and Paul Makar¹, (1)Environment and Climate Change Canada, Air Quality Research Division, Toronto, ON, Canada, (2)Environment and Climate Change Canada, Air Quality Research Division, Ottawa, ON, Canada, (3)Alberta Environment and Parks, Edmonton, Canada, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States