Ailin Brakstad, University of Bergen, Geophysical Institute, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway, Kjetil Våge, Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway, Marius Årthun, Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway, Geoffrey Gebbie, Woods Hole Oceanographic Institution, Physical Oceanography, Woods Hole, United States and Emil Jeansson, NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, Bergen, Norway