Fogwill, C.Turney, C.Golledge, N.Etheridge, D.Rubino, M.Thornton, D.Baker, A.Woodward, J.Winter, K.Van Ommen, T.Moy, A.Curran, M.Davies, S.Weber, M.Bird, M.Munksgaard, N.Menviel, L.Rootes, C.Ellis, B.Millman, H.et al.2017-03-192017-03-192017Scientific Reports, 2017; 7(1):39979-1-39979-102045-23222045-2322http://hdl.handle.net/2440/103934Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial Termination (LGT; 18,000-11,650 yrs ago) allows us to disentangle ice-climate feedbacks that are key to improving future projections. Whilst the sequence of events during this period is reasonably well-known, relatively poor chronological control has precluded precise alignment of ice, atmospheric and marine records, making it difficult to assess relationships between Antarctic ice-sheet (AIS) dynamics, climate change and sea level. Here we present results from a highly-resolved 'horizontal ice core' from the Weddell Sea Embayment, which records millennial-scale AIS dynamics across this extensive region. Counterintuitively, we find AIS mass-loss across the full duration of the Antarctic Cold Reversal (ACR; 14,600-12,700 yrs ago), with stabilisation during the subsequent millennia of atmospheric warming. Earth-system and ice-sheet modelling suggests these contrasting trends were likely Antarctic-wide, sustained by feedbacks amplified by the delivery of Circumpolar Deep Water onto the continental shelf. Given the anti-phase relationship between inter-hemispheric climate trends across the LGT our findings demonstrate that Southern Ocean-AIS feedbacks were controlled by global atmospheric teleconnections. With increasing stratification of the Southern Ocean and intensification of mid-latitude westerly winds today, such teleconnections could amplify AIS mass loss and accelerate global sea-level rise.en© The Author(s) 2017Journal article003006239410.1038/srep399790003911877000012-s2.0-85008626284283525Cooper, A. [0000-0002-7738-7851]