The Contribution of Iceland-Scotland Overflow to the 20th Century Weakening of the Atlantic Overturning Circulation

David J Thornalley1,2, Delia Oppo2, Wanyi Lu2, Ian R Hall3, I.N. Nicholas McCave4 and Lloyd D Keigwin2, (1)University College London, Dept. of Geography, London, United Kingdom, (2)WHOI, Geology and Geophysics, Woods Hole, United States, (3)Cardiff University, School of Earth and Environmental Sciences, Cardiff, United Kingdom, (4)University of Cambridge, Earth Sciences, Cambridge, United Kingdom