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|dc.contributor.author||Van Ommen, T.||en|
|dc.identifier.citation||Scientific Reports, 2017; 7(1):39979-1-39979-10||en|
|dc.description.abstract||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.||en|
|dc.description.statementofresponsibility||C.J. Fogwill ... & A. Cooper||en|
|dc.publisher||Nature Publishing Group||en|
|dc.rights||© The Author(s) 2017||en|
|dc.title||Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination||en|
|pubs.library.collection||Australian Centre for Ancient DNA publications||en|
|Appears in Collections:||Australian Centre for Ancient DNA publications|
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