Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4
Abstract The record of past climate highlights recurrent and intense millennial anomalies, characterised by a distinct pattern of inter-polar temperature change, termed the ‘thermal bipolar seesaw’, which is widely believed to arise from rapid changes in the Atlantic overturning circulation. By forc...
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2020
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Online Access: | http://dx.doi.org/10.1038/s43247-020-00024-3 https://www.nature.com/articles/s43247-020-00024-3.pdf https://www.nature.com/articles/s43247-020-00024-3 |
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crspringernat:10.1038/s43247-020-00024-3 2023-05-15T14:11:48+02:00 Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 Skinner, Luke Menviel, Laurie Broadfield, Lauren Gottschalk, Julia Greaves, Mervyn RCUK | Natural Environment Research Council Department of Education and Training | Australian Research Council Deutsche Forschungsgemeinschaft 2020 http://dx.doi.org/10.1038/s43247-020-00024-3 https://www.nature.com/articles/s43247-020-00024-3.pdf https://www.nature.com/articles/s43247-020-00024-3 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Communications Earth & Environment volume 1, issue 1 ISSN 2662-4435 General Earth and Planetary Sciences General Environmental Science journal-article 2020 crspringernat https://doi.org/10.1038/s43247-020-00024-3 2022-01-04T07:56:38Z Abstract The record of past climate highlights recurrent and intense millennial anomalies, characterised by a distinct pattern of inter-polar temperature change, termed the ‘thermal bipolar seesaw’, which is widely believed to arise from rapid changes in the Atlantic overturning circulation. By forcing a suppression of North Atlantic convection, models have been able to reproduce many of the general features of the thermal bipolar seesaw; however, they typically fail to capture the full magnitude of temperature change reconstructed using polar ice cores from both hemispheres. Here we use deep-water temperature reconstructions, combined with parallel oxygenation and radiocarbon ventilation records, to demonstrate the occurrence of enhanced deep convection in the Southern Ocean across the particularly intense millennial climate anomaly, Heinrich Stadial 4. Our results underline the important role of Southern Ocean convection as a potential amplifier of Antarctic warming, and atmospheric CO 2 rise, that is responsive to triggers originating in the North Atlantic. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Southern Ocean Springer Nature (via Crossref) Antarctic Southern Ocean Communications Earth & Environment 1 1 |
institution |
Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Environmental Science Skinner, Luke Menviel, Laurie Broadfield, Lauren Gottschalk, Julia Greaves, Mervyn Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract The record of past climate highlights recurrent and intense millennial anomalies, characterised by a distinct pattern of inter-polar temperature change, termed the ‘thermal bipolar seesaw’, which is widely believed to arise from rapid changes in the Atlantic overturning circulation. By forcing a suppression of North Atlantic convection, models have been able to reproduce many of the general features of the thermal bipolar seesaw; however, they typically fail to capture the full magnitude of temperature change reconstructed using polar ice cores from both hemispheres. Here we use deep-water temperature reconstructions, combined with parallel oxygenation and radiocarbon ventilation records, to demonstrate the occurrence of enhanced deep convection in the Southern Ocean across the particularly intense millennial climate anomaly, Heinrich Stadial 4. Our results underline the important role of Southern Ocean convection as a potential amplifier of Antarctic warming, and atmospheric CO 2 rise, that is responsive to triggers originating in the North Atlantic. |
author2 |
RCUK | Natural Environment Research Council Department of Education and Training | Australian Research Council Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Skinner, Luke Menviel, Laurie Broadfield, Lauren Gottschalk, Julia Greaves, Mervyn |
author_facet |
Skinner, Luke Menviel, Laurie Broadfield, Lauren Gottschalk, Julia Greaves, Mervyn |
author_sort |
Skinner, Luke |
title |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
title_short |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
title_full |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
title_fullStr |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
title_full_unstemmed |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4 |
title_sort |
southern ocean convection amplified past antarctic warming and atmospheric co2 rise during heinrich stadial 4 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s43247-020-00024-3 https://www.nature.com/articles/s43247-020-00024-3.pdf https://www.nature.com/articles/s43247-020-00024-3 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Southern Ocean |
op_source |
Communications Earth & Environment volume 1, issue 1 ISSN 2662-4435 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-020-00024-3 |
container_title |
Communications Earth & Environment |
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1 |
container_issue |
1 |
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1766283997360422912 |