Wegener Center for Climate and Global Change, University of Graz, Austria

Institute for Geophysics, Astrophysics, and Meteorology, University of Graz, Austria

Wegener Center for Climate and Global Change, University of Graz, Austria

Institute for Geophysics, Astrophysics, and Meteorology, University of Graz, Austria

Jet Propulsion Laboratory, California Institute of Technology, CA, USA

New Mexico Institute of Mining and Technology, NM, USA

Wegener Center for Climate and Global Change, University of Graz, Austria

Institute for Geophysics, Astrophysics, and Meteorology, University of Graz, Austria

ESA/ESRIN, Frascati, Italy

Institut für Meteorologie und Klimaforschung, Forschungszentrum Karlsruhe, Germany