Bergen Center for Computational Science, UNIFOB, University of Bergen, Thormøhlensgate 55, 5008 Bergen, Norway

Center for Nonlinear Studies, Institute of Cybernetics, Tallinn University of Technology, Akadeemia tee 21, 12618 Tallinn, Estonia

Department of Nonlinear Geophysical Processes, Institute of Applied Physics, Russian Academy of Sciences, 46 Uljanov Street, Nizhny Novgorod, 603950, Russia

Center for Nonlinear Studies, Institute of Cybernetics, Tallinn University of Technology, Akadeemia tee 21, 12618 Tallinn, Estonia

School of Earth and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia