1. Department of Environmental Meteorology, Brandenburg University of Technology Cottbus–Senftenberg, Burger Chaussee 2, D-03044 Cottbus, Germany
2. Department of Aerodynamics and Fluid Mechanics, Brandenburg University of Technology Cottbus–Senftenberg, Siemens-Halske-Ring 14, D-03046 Cottbus, Germany
3. A. M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevsky 3, 119017 Moscow, Russia