1. Climate Research Group, Division of Environmental Physics and Meteorology, Faculty of Physics, National and Kapodistrian University of Athens, Athens, Greece
2. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russia
3. School of Environment Science and Spatial Informatics, University of Mining and Technology, Xuzhou, Jiangsu, PR China
4. Department of Electronics, Computing and Mathematics, College of Science and Engineering, University of Derby, Derby, UK
5. Section of Condensed Matter Physics, Department of Physics, National and Kapodistrian University of Athens, Zografos, Greece