Peter Peterson¹, Siyuan Wang², Sham Thanekar³, Jose D Fuentes⁴, Paul B Shepson⁵, Johannes Zielcke⁶, Udo Friess⁷, Denis Pöhler⁸, Ulrich Platt⁷, William R Simpson⁹, Son V Nghiem¹⁰ and Kerri Pratt¹¹, (1)Whittier College, Whittier, CA, United States, (2)National Center for Atmospheric Research, Boulder, CO, United States, (3)Pennsylvania State University Main Campus, University Park, PA, United States, (4)Penn State University, University Park, PA, United States, (5)Purdue University, Departments of Chemistry, and Earth, Atmospheric, and Planetary Sciences, West Lafayette, IN, United States, (6)Institute for Environmental Physics, Heidelberg, Germany, (7)University of Heidelberg, Heidelberg, Germany, (8)University of Heidelberg, Institute for Environmental Physics, Heidelberg, Germany, (9)Univ. Alaska, Fairbanks, AK, United States, (10)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (11)University of Michigan Ann Arbor, Department of Chemistry and Department of Earth & Environmental Sciences, Ann Arbor, MI, United States