Patriot Hills, West Antarctica Last Glacial Transition dD Data Fogwill, C.; Turney, C.S.M.; Golledge, N.R.; Etheridge, D.M.; Rubino, M.; Thornton, D.P.; Baker, A.; Woodward, J.; Winter, K.; van Ommen, T.D.; Moy, A.D.; Curran, M.A.J.; Davies, S.M.; Weber, M.E.; Bird, M.I.; Munksgaard, N.C.; Menviel, L.; Rootes, C.M.; Ellis, B.; Millman, H.; Vohra, J.; Rivera, A.; Cooper, A. Fogwill, C. Turney, C.S.M. Golledge, N.R. Etheridge, D.M. Rubino, M. Thornton, D.P. Baker, A. Woodward, J. Winter, K. van Ommen, T.D. Moy, A.D. Curran, M.A.J. Davies, S.M. Weber, M.E. Bird, M.I. Munksgaard, N.C. Menviel, L. Rootes, C.M. Ellis, B. Millman, H. Vohra, J. Rivera, A. Cooper, A. earth science/paleoclimate/ice cores (depth,null,null,meter,null,ice cores,null,null,N,Distance along transect of blue ice) earth science/paleoclimate/ice cores (age,null,null,calendar year before present,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil SMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice core (Patriot Hills>LATITUDE -80.3>LONGITUDE -81.35) Reconstructing 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. STUDY NOTES: Ice core hydrogen isotope (dD) data from the Patriot Hills blue ice area, Antarctica, from the Last Glacial Transition (11,000 to 24,000 years before present). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Fogwill, C. Investigator : Turney, C.S.M. Investigator : Golledge, N.R. Investigator : Etheridge, D.M. Investigator : Rubino, M. Investigator : Thornton, D.P. Investigator : Baker, A. Investigator : Woodward, J. Investigator : Winter, K. Investigator : van Ommen, T.D. Investigator : Moy, A.D. Investigator : Curran, M.A.J. Investigator : Davies, S.M. Investigator : Weber, M.E. Investigator : Bird, M.I. Investigator : Munksgaard, N.C. Investigator : Menviel, L. Investigator : Rootes, C.M. Investigator : Ellis, B. Investigator : Millman, H. Investigator : Vohra, J. Investigator : Rivera, A. Investigator : Cooper, A. 2017-03-19 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/21691 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/patriot/patriot2017dd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/patriot/patriot2017dd.txt English https://www.ncdc.noaa.gov/paleo/study/21691 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/patriot/patriot2017dd.txt C.J. Fogwill, C.S.M. Turney, N.R. Golledge, D.M. Etheridge, M. Rubino, D.P. Thornton, A. Baker, J. Woodward, K. Winter, T.D. van Ommen, A.D. Moy, M.A.J. Curran, S.M. Davies, M.E. Weber, M.I. Bird, N.C. Munksgaard, L. Menviel, C.M. Rootes, B. Ellis, H. Millman, J. Vohra, A. Rivera, A. Cooper2017Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial TerminationScientific Reports39979710.1038/srep39979http://www.nature.com/articles/srep39979 START YEAR: 23988 cal yr BP * END YEAR: 11174 cal yr BP -81.35 -80.3 -81.35 -80.3