1. Department of Physics; Humboldt University; Berlin Germany
2. Potsdam Institute for Climate Impact Research; Potsdam Brandenburg Germany
3. Department of Geography; University of California; Santa Barbara California USA
4. Now at Institute of Earth- and Environmental Sciences; University of Potsdam; Potsdam Germany
5. Department of Physics; University of Saõ Paulo; São Paulo Brazil
6. CCST INPE; Cachoeira Paulista; São Paulo Brazil
7. Department of Control Theory; Nizhny Novgorod State University; Nizhny Novgorod Russia