Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination
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...
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Online Access: | http://hdl.handle.net/11591/410534 https://doi.org/10.1038/srep39979 |
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ftuncampaniairis:oai:iris.unicampania.it:11591/410534 2024-04-14T08:02:49+00:00 Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination Fogwill C. J. 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. J. 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. 2017 http://hdl.handle.net/11591/410534 https://doi.org/10.1038/srep39979 eng eng info:eu-repo/semantics/altIdentifier/pmid/28054598 info:eu-repo/semantics/altIdentifier/wos/WOS:000391187700001 volume:7 issue:1 firstpage:39979 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11591/410534 doi:10.1038/srep39979 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008626284 www.nature.com/srep/index.html info:eu-repo/semantics/article 2017 ftuncampaniairis https://doi.org/10.1038/srep39979 2024-03-21T16:14:41Z 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. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet Southern Ocean Weddell Sea Università degli Studi della Campania "Luigi Vanvitelli": CINECA IRIS V: Antarctic Southern Ocean The Antarctic Weddell Sea Weddell Scientific Reports 7 1 |
institution |
Open Polar |
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Università degli Studi della Campania "Luigi Vanvitelli": CINECA IRIS V: |
op_collection_id |
ftuncampaniairis |
language |
English |
description |
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. |
author2 |
Fogwill, C. J. 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. |
format |
Article in Journal/Newspaper |
author |
Fogwill C. J. 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. |
spellingShingle |
Fogwill C. J. 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. Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
author_facet |
Fogwill C. J. 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. |
author_sort |
Fogwill C. J. |
title |
Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
title_short |
Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
title_full |
Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
title_fullStr |
Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
title_full_unstemmed |
Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination |
title_sort |
antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the last glacial termination |
publishDate |
2017 |
url |
http://hdl.handle.net/11591/410534 https://doi.org/10.1038/srep39979 |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Sea Weddell |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Sea Weddell |
genre |
Antarc* Antarctic ice core Ice Sheet Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic ice core Ice Sheet Southern Ocean Weddell Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/28054598 info:eu-repo/semantics/altIdentifier/wos/WOS:000391187700001 volume:7 issue:1 firstpage:39979 journal:SCIENTIFIC REPORTS http://hdl.handle.net/11591/410534 doi:10.1038/srep39979 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008626284 www.nature.com/srep/index.html |
op_doi |
https://doi.org/10.1038/srep39979 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1796317763389620224 |