Kjetil Våge, University of Bergen and the Bjerknes Centre for Climate Research, Bergen, Norway, Stefanie Semper, Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway, Hedinn Valdimarsson, Marine Research Institute, Reykjavik, Iceland, Steingrimur Jonsson, Univ Akureyri, Akureyri, Iceland, Kent Moore, Univ Toronto, Toronto, ON, Canada and Robert S Pickart, Woods Hole Oceanographic Institution, Woods Hole, MA, United States