Felix Ploeger1, Harald Boenisch3, Andreas Engel2, Florian Haenel3, Gabriele Stiller3
1Institute of Energy and Climate Research, Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany, 2Institute for Atmospheric and Environmental Sciences, Goethe Universität Frankfurt, Frankfurt, Germany, 3Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany