Can Li¹, Nicolas Theys², Nickolay Anatoly Krotkov³, Joanna Joiner⁴, Simon A Carn⁵, Colin J Seftor⁶, Vitali E. Fioletov⁷ and Chris A McLinden⁷, (1)University of Maryland College Park, College Park, MD, United States, (2)Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)NASA GSFC, Greenbelt, MD, United States, (5)Michigan Technological University, Department of Geological and Mining Engineering & Sciences, Houghton, MI, United States, (6)NASA Goddard SFC, Greenbelt, MD, United States, (7)Environment and Climate Change Canada, Air Quality Research Division, Toronto, ON, Canada