Rossby Centre, Swedish Meteorological and Hydrological Institute, SMHI, Norrköping, SE-602 19; Department of Meteorology and Bolin Centre for climate research, Stockholm University, Stockholm, SE-106 91 , Rossby Centre, Swedish Meteorological and Hydrological Institute, SMHI, Norrköping, SE-602 19, SE; Institute of Coastal Systems, Helmholtz-Zentrum Hereon, Geesthacht, DE-21502 , Rossby Centre, Swedish Meteorological and Hydrological Institute, SMHI, Norrköping, SE-602 19, SE; Department of Geophysics, Faculty of Science, University of Zagreb, 10000 Zagreb