Ewa Bednarz, CIRES / NOAA Chemical Sciences Laboratory, Boulder, United States, Amy H Butler, NOAA Chemical Sciences Laboratory, University of Colorado, Boulder, United States, Xinyue Wang, University of Colorado at Boulder, ATOC, Boulder, United States, Zhihong Zhuo, University of Quebec in Montreal (UQAM), Department of Earth and Atmospheric Sciences, Montreal, QC, Canada, Wandi Yu, Lawrence Livermore National Laboratory, Livermore, United States, Georgiy L Stenchikov, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia, Matthew Toohey, University of Saskatchewan, Saskatoon, Canada and Yunqian Zhu, Cooperative Institute for Research in Environmental Sciences, Boulder, United States