Christopher Gary Kruse, National Center for Atmospheric Research, Boulder, United States, M Joan Alexander, NorthWest Research Associates Boulder, Boulder, CO, United States, Lars Hoffmann, Forschungszentrum Jülich GmbH, Jülich Supercomputing Center, Jülich, Germany, Inna Polichtchouk, European Center for Medium-Range Weather Forecasts, Reading, United Kingdom, Annelize van Niekerk, Met Office, Reading, United Kingdom, Riwal Plougonven, Laboratoire de Météorologie Dynamique Palaiseau, Palaiseau Cedex, France, Corwin Wright, University of Bath, Bath, United Kingdom, Julio T Bacmeister, AMP/CGD, Boulder, CO, United States, Manfred Ern, Forschungszentrum Jülich GmbH, Stratosphere, Jülich, Germany, Kaoru Sato, University of Tokyo, Department of Earth and Planetary Science, Bunkyo-ku, Japan, Ryosuke Shibuya, JAMSTEC Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan, Laura Holt, NorthWest Research Associates, Boulder, United States, Petr Šácha, Universidade de Vigo, EPhysLab, Ourense, Spain and Sonja Gisinger, German Aerospace Center DLR, Oberpfaffenhofen, Germany