1. Department of Control Theory, Nizhny Novgorod State University, 23, Gagarin Avenue, 603950 Nizhny Novgorod, Russia
2. Institute of Applied Physics, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
3. Potsdam Institute for Climate Impact Research Telegrafenberg, 14473 Potsdam, Germany
4. Humboldt-Universitat zu Berlin Unter den Linden 6, 10099 Berlin, Germany