Lee Mauldin¹, Christopher A Cantrell², Matti Rissanen³, John B Nowak⁴, Andrew T Lambe⁵, Manjula R Canagaratna⁵, Chao Yan³, Wei Nie⁶ and Xucheng He⁷, (1)University of Colorado, Boulder, Boulder, CO, United States, (2)Univ of Colorado, Boulder, CO, United States, (3)University of Helsinki, Helsinki, Finland, (4)NASA Langley Research Center, Hampton, VA, United States, (5)Aerodyne Research Inc., Billerica, MA, United States, (6)Nanjing University, School of Atmospheric Sciences, Nanjing, China, (7)University of Helsinki, Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, Helsinki, Finland