Florian Tornow, Timothy W Juliano², Ann M Fridlind³, Andrew S Ackerman⁴, Gregory Elsaesser⁵, Bart Geerts⁶, Christian P Lackner⁷, Israel Silber⁸, Mikhail Ovchinnikov⁸, Gunilla Svensson⁹, Michael K H Tjernstrom⁹, Peng Wu¹⁰, Kamal Kant Chandrakar¹¹, Jan Chylik¹², Alejandro Baro Perez¹³, Dmitry Chechin¹⁴, Annica Ekman⁹, Anu Gupta¹⁵, Luisa Ickes¹⁶, Andrey Debolskiy¹⁷, Branko Kosovic¹⁸, Weiwei Li¹⁹, Hugh Morrison²⁰, Rostival Fadeev²¹, Roel Neggers¹², Anna Possner²², Tomi Raatikainen²³, Michail Karalis²⁴, Niklas Schnierstein¹², Mikhail Tolstykh²⁵, Martin Köhler²⁶, Lulin Xue²⁷, Xue Zheng²⁸, Evgeny Mortikov¹⁷ and Shin-ichiro Schima¹⁵, (1)National Center for Atmospheric Research, Boulder, United States, (2)NASA Goddard Institute for Space Studies, New York, NY, United States, (3)NASA Goddard Institute for Space Studies, New York, United States, (4)Columbia University/NASA GISS, New York, United States, (5)University of Wyoming, Atmospheric Science, Laramie, United States, (6)University of Wyoming, Laramie, WY, United States, (7)Pacific Northwest National Laboratory, Richland, United States, (8)Stockholm University, Department of Meteorology, Stockholm, Sweden, (9)Pacific Northwest National Laboratory, Richland, WA, United States, (10)National Center for Atmospheric Research, Boulder, CO, United States, (11)University of Cologne, Cologne, Germany, (12)Chalmers University of Technology, Gothenburg, Sweden, (13)Moscow Institute of Physics and Technology, Moscow, Russia, (14)University of Hyogo, Hyogo, Japan, (15)Stockholm University, Department of Space, Earth and Environment, Gothenburg, Sweden, (16)Moscow State University, Moscow, Russia, (17)Johns Hopkins University, Ralph O'Connor Sustainable Energy Institute, Baltimore, MD, United States, (18)NCAR, RAL, Boulder, United States, (19)NSF NCAR, MMM Laboratory, Boulder, United States, (20)Russian Academy of Sciences, Moscow, Russia, (21)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (22)Finnish Meteorological Institute, Helsinki, Finland, (23)Stockholm University, Stockholm, Sweden, (24)Marchuk Institute of Numerical Mathematics RAS and Hydrometcentre of Russia, Moscow, Russia, (25)Deutscher Wetterdienst, Lindenberg, Germany, (26)NSF National Center for Atmospheric Research, Boulder, United States, (27)RSMAS, University of Miami, Miami, United States