Georgios Gkatzelis^1,2, Matthew Mitchell Coggon^1,2, Brian C McDonald^3,4, Jeff Peischl^5,6, Kenneth C. Aikin^1,2, Jessica Gilman², Thomas B Ryerson⁷, Michael Trainer³ and Carsten Warneke⁸, (1)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (2)NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States, (3)Chemical Sciences Division, NOAA Earth System Research Laboratory, Boulder, CO, United States, (4)Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States, (5)NOAA Chemical Sciences Division, Boulder, CO, United States, (6)Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States, (7)NOAA ESRL Chemical Sciences Division, Boulder, CO, United States, (8)NOAA Chemical Sciences Div., Boulder, CO, United States