Jason Michael St Clair¹, Julie M Nicely², Reem A Hannun³, Jin Liao⁴, Glenn M Wolfe⁵, Thomas F Hanisco⁶, Chelsea R Thompson⁷, Jeff Peischl⁸, Ilann Bourgeois⁸, Thomas B Ryerson⁹ and ATom Science Team, (1)University of Maryland Baltimore County, Baltimore, MD, United States, (2)University of Maryland College Park, College Park, MD, United States, (3)Harvard Univ/Anderson Group, Cambridge, MA, United States, (4)Universities Space Research Association and NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (6)NASA GSFC, Greenbelt, MD, United States, (7)Institute for Arctic and Alpine Research, Boulder, CO, United States, (8)NOAA Chemical Sciences Division, Boulder, CO, United States, (9)NOAA ESRL Chemical Sciences Division, Boulder, CO, United States