1. Institut für Physik der Atmosphäre Deutsches Zentrum für Luft‐ und Raumfahrt Wessling Germany
2. Department of Geography Masaryk University Brno Czech Republic
3. Faculty of Physics University of Vienna Vienna Austria
4. Department of Earth and Atmospheric Sciences University of Houston Houston Texas USA
5. Atmospheric Chemistry and Dynamics Laboratory NASA Goddard Space Flight Center Greenbelt Maryland USA
6. Department of Atmospheric and Oceanic Science University of Maryland College Park Maryland USA
7. School of Meteorology University of Oklahoma Norman Oklahoma USA
8. NCAR Boulder Colorado USA