Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4
<jats:title>Abstract</jats:title><jats:p>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 change...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/309141 2024-02-04T09:55:39+01:00 Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 Skinner, L Menviel, L Broadfield, L Gottschalk, J Greaves, M 2020 application/vnd.openxmlformats-officedocument.wordprocessingml.document https://www.repository.cam.ac.uk/handle/1810/309141 https://doi.org/10.17863/CAM.56238 en eng eng Springer Science and Business Media LLC http://dx.doi.org/10.1038/s43247-020-00024-3 Communications Earth and Environment https://www.repository.cam.ac.uk/handle/1810/309141 doi:10.17863/CAM.56238 All rights reserved 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Article 2020 ftunivcam https://doi.org/10.17863/CAM.56238 2024-01-11T23:32:35Z <jats:title>Abstract</jats:title><jats:p>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<jats:sub>2</jats:sub> rise, that is responsive to triggers originating in the North Atlantic.</jats:p> Article in Journal/Newspaper Antarc* Antarctic North Atlantic Southern Ocean Apollo - University of Cambridge Repository Antarctic Southern Ocean |
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Open Polar |
collection |
Apollo - University of Cambridge Repository |
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ftunivcam |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Skinner, L Menviel, L Broadfield, L Gottschalk, J Greaves, M Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
description |
<jats:title>Abstract</jats:title><jats:p>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<jats:sub>2</jats:sub> rise, that is responsive to triggers originating in the North Atlantic.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Skinner, L Menviel, L Broadfield, L Gottschalk, J Greaves, M |
author_facet |
Skinner, L Menviel, L Broadfield, L Gottschalk, J Greaves, M |
author_sort |
Skinner, L |
title |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
title_short |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
title_full |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
title_fullStr |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
title_full_unstemmed |
Southern Ocean convection amplified past Antarctic warming and atmospheric CO 2 rise during Heinrich Stadial 4 |
title_sort |
southern ocean convection amplified past antarctic warming and atmospheric co 2 rise during heinrich stadial 4 |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
https://www.repository.cam.ac.uk/handle/1810/309141 https://doi.org/10.17863/CAM.56238 |
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_relation |
https://www.repository.cam.ac.uk/handle/1810/309141 doi:10.17863/CAM.56238 |
op_rights |
All rights reserved |
op_doi |
https://doi.org/10.17863/CAM.56238 |
_version_ |
1789959733941108736 |