Nicole Albern¹, Aiko Voigt^1,2, Joaquim G Pinto³ and David W J Thompson⁴, (1)Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany, (2)Lamont-Doherty Earth Observatory, Columbia University, New York, United States, (3)Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-TRO), Karlsruhe, Germany, (4)Colorado State University, Atmospheric Science, Fort Collins, CO, United States