Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial
Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the bipolar seesaw). Here we exploit a bidecadally resolved 14 C data set...
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Online Access: | https://doi.org/10.1038/s41467-017-00577-6 http://ecite.utas.edu.au/121373 |
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ftunivtasecite:oai:ecite.utas.edu.au:121373 2023-05-15T13:49:03+02:00 Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial Turney, CSM Jones, RT Phipps, SJ Thomas, Z Hogg, A Kershaw, AP Fogwill, CJ Palmer, J Ramsey, CB Adolphi, F Muscheler, R Hughen, KA Staff, RA Grosvenor, M Golledge, NR Rasmussen, SO Hutchinson, DK Haberle, S Lorrey, A Boswijk, G Cooper, A 2017 application/pdf https://doi.org/10.1038/s41467-017-00577-6 http://ecite.utas.edu.au/121373 en eng Nature Publishing Group http://ecite.utas.edu.au/121373/1/turney2017_nature_communications.pdf http://dx.doi.org/10.1038/s41467-017-00577-6 Turney, CSM and Jones, RT and Phipps, SJ and Thomas, Z and Hogg, A and Kershaw, AP and Fogwill, CJ and Palmer, J and Ramsey, CB and Adolphi, F and Muscheler, R and Hughen, KA and Staff, RA and Grosvenor, M and Golledge, NR and Rasmussen, SO and Hutchinson, DK and Haberle, S and Lorrey, A and Boswijk, G and Cooper, A, Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial, Nature Communications, 8 Article 520. ISSN 2041-1723 (2017) [Refereed Article] http://ecite.utas.edu.au/121373 Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1038/s41467-017-00577-6 2019-12-14T07:05:02Z Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the bipolar seesaw). Here we exploit a bidecadally resolved 14 C data set obtained from New Zealand kauri ( Agathis australis ) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14 C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train. Article in Journal/Newspaper Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Greenland Pacific New Zealand Nature Communications 8 1 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology Turney, CSM Jones, RT Phipps, SJ Thomas, Z Hogg, A Kershaw, AP Fogwill, CJ Palmer, J Ramsey, CB Adolphi, F Muscheler, R Hughen, KA Staff, RA Grosvenor, M Golledge, NR Rasmussen, SO Hutchinson, DK Haberle, S Lorrey, A Boswijk, G Cooper, A Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Palaeoclimatology |
description |
Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the bipolar seesaw). Here we exploit a bidecadally resolved 14 C data set obtained from New Zealand kauri ( Agathis australis ) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14 C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train. |
format |
Article in Journal/Newspaper |
author |
Turney, CSM Jones, RT Phipps, SJ Thomas, Z Hogg, A Kershaw, AP Fogwill, CJ Palmer, J Ramsey, CB Adolphi, F Muscheler, R Hughen, KA Staff, RA Grosvenor, M Golledge, NR Rasmussen, SO Hutchinson, DK Haberle, S Lorrey, A Boswijk, G Cooper, A |
author_facet |
Turney, CSM Jones, RT Phipps, SJ Thomas, Z Hogg, A Kershaw, AP Fogwill, CJ Palmer, J Ramsey, CB Adolphi, F Muscheler, R Hughen, KA Staff, RA Grosvenor, M Golledge, NR Rasmussen, SO Hutchinson, DK Haberle, S Lorrey, A Boswijk, G Cooper, A |
author_sort |
Turney, CSM |
title |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_short |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_full |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_fullStr |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_full_unstemmed |
Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial |
title_sort |
rapid global ocean-atmosphere response to southern ocean freshening during the last glacial |
publisher |
Nature Publishing Group |
publishDate |
2017 |
url |
https://doi.org/10.1038/s41467-017-00577-6 http://ecite.utas.edu.au/121373 |
geographic |
Antarctic Southern Ocean Greenland Pacific New Zealand |
geographic_facet |
Antarctic Southern Ocean Greenland Pacific New Zealand |
genre |
Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Greenland Iceberg* North Atlantic Southern Ocean |
op_relation |
http://ecite.utas.edu.au/121373/1/turney2017_nature_communications.pdf http://dx.doi.org/10.1038/s41467-017-00577-6 Turney, CSM and Jones, RT and Phipps, SJ and Thomas, Z and Hogg, A and Kershaw, AP and Fogwill, CJ and Palmer, J and Ramsey, CB and Adolphi, F and Muscheler, R and Hughen, KA and Staff, RA and Grosvenor, M and Golledge, NR and Rasmussen, SO and Hutchinson, DK and Haberle, S and Lorrey, A and Boswijk, G and Cooper, A, Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial, Nature Communications, 8 Article 520. ISSN 2041-1723 (2017) [Refereed Article] http://ecite.utas.edu.au/121373 |
op_doi |
https://doi.org/10.1038/s41467-017-00577-6 |
container_title |
Nature Communications |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766250727486783488 |