Radiocarbon evidence for the stability of polar ocean overturning during the Holocene
Acknowledgements: We thank the cruise members of RVIB Nathaniel B. Palmer cruises 0805 and 1103, as well as Celtic Explorer cruise CE0806, for supporting the deep-sea coral sampling. T.C. acknowledges support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200),...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/355054 2024-02-04T09:55:55+01:00 Radiocarbon evidence for the stability of polar ocean overturning during the Holocene Chen, T Robinson, LF Li, T Burke, A Zhang, X Stewart, JA White, NJ Knowles, TDJ 2023-08-22T13:50:49Z application/zip text/xml application/pdf https://www.repository.cam.ac.uk/handle/1810/355054 en eng eng Springer Science and Business Media LLC http://dx.doi.org/10.1038/s41561-023-01214-2 Nature Geoscience https://www.repository.cam.ac.uk/handle/1810/355054 37 Earth Sciences 3708 Oceanography 3709 Physical Geography and Environmental Geoscience 3705 Geology 14 Life Below Water Article 2023 ftunivcam 2024-01-11T23:23:31Z Acknowledgements: We thank the cruise members of RVIB Nathaniel B. Palmer cruises 0805 and 1103, as well as Celtic Explorer cruise CE0806, for supporting the deep-sea coral sampling. T.C. acknowledges support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200), Fundamental Research Funds for the Central Universities (020614380116) and National Natural Science Foundation of China (41991325, 41822603 and 42021001). L.F.R. acknowledges support from the Natural Environment Research Council (NE/S001743/1, NE/R005117/1, NE/N003861/1 and NE/X00127X/1). <jats:title>Abstract</jats:title><jats:p>Proxy-based studies have linked the pre-industrial atmospheric <jats:inline-formula><jats:alternatives><jats:tex-math>$$p_{{\rm{CO}}_{2}}$$</jats:tex-math> p CO 2 </jats:alternatives></jats:inline-formula> rise of ∼20 ppmv in the mid- to late Holocene to an inferred increase in the Southern Ocean overturning and associated biogeochemical changes. However, the history of polar ocean overturning and ventilation through the Holocene remains poorly constrained, leaving important gaps in the assessment of the feedbacks between changes in ocean circulation and the carbon cycle in a warm climate state. The deep-ocean radiocarbon content, which provides a measure of ventilation, responds to circulation changes on centennial to millennial time scales. Here we present absolutely dated deep-sea coral radiocarbon records from the Drake Passage, between South America and Antarctica, and Reykjanes Ridge, south of Iceland, over the Holocene. Our data suggest that ventilation in the Antarctic circumpolar waters and North Atlantic Deep Water is surprisingly invariant within proxy uncertainties at our sampling resolution. Our findings indicate that long-term, large-scale polar ocean overturning has not been disturbed to a level resolvable by radiocarbon and is probably not responsible for the millennial atmosphere ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage Iceland North Atlantic Deep Water North Atlantic Southern Ocean Apollo - University of Cambridge Repository Antarctic Southern Ocean The Antarctic Drake Passage Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
37 Earth Sciences 3708 Oceanography 3709 Physical Geography and Environmental Geoscience 3705 Geology 14 Life Below Water |
spellingShingle |
37 Earth Sciences 3708 Oceanography 3709 Physical Geography and Environmental Geoscience 3705 Geology 14 Life Below Water Chen, T Robinson, LF Li, T Burke, A Zhang, X Stewart, JA White, NJ Knowles, TDJ Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
topic_facet |
37 Earth Sciences 3708 Oceanography 3709 Physical Geography and Environmental Geoscience 3705 Geology 14 Life Below Water |
description |
Acknowledgements: We thank the cruise members of RVIB Nathaniel B. Palmer cruises 0805 and 1103, as well as Celtic Explorer cruise CE0806, for supporting the deep-sea coral sampling. T.C. acknowledges support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200), Fundamental Research Funds for the Central Universities (020614380116) and National Natural Science Foundation of China (41991325, 41822603 and 42021001). L.F.R. acknowledges support from the Natural Environment Research Council (NE/S001743/1, NE/R005117/1, NE/N003861/1 and NE/X00127X/1). <jats:title>Abstract</jats:title><jats:p>Proxy-based studies have linked the pre-industrial atmospheric <jats:inline-formula><jats:alternatives><jats:tex-math>$$p_{{\rm{CO}}_{2}}$$</jats:tex-math> p CO 2 </jats:alternatives></jats:inline-formula> rise of ∼20 ppmv in the mid- to late Holocene to an inferred increase in the Southern Ocean overturning and associated biogeochemical changes. However, the history of polar ocean overturning and ventilation through the Holocene remains poorly constrained, leaving important gaps in the assessment of the feedbacks between changes in ocean circulation and the carbon cycle in a warm climate state. The deep-ocean radiocarbon content, which provides a measure of ventilation, responds to circulation changes on centennial to millennial time scales. Here we present absolutely dated deep-sea coral radiocarbon records from the Drake Passage, between South America and Antarctica, and Reykjanes Ridge, south of Iceland, over the Holocene. Our data suggest that ventilation in the Antarctic circumpolar waters and North Atlantic Deep Water is surprisingly invariant within proxy uncertainties at our sampling resolution. Our findings indicate that long-term, large-scale polar ocean overturning has not been disturbed to a level resolvable by radiocarbon and is probably not responsible for the millennial atmosphere ... |
format |
Article in Journal/Newspaper |
author |
Chen, T Robinson, LF Li, T Burke, A Zhang, X Stewart, JA White, NJ Knowles, TDJ |
author_facet |
Chen, T Robinson, LF Li, T Burke, A Zhang, X Stewart, JA White, NJ Knowles, TDJ |
author_sort |
Chen, T |
title |
Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
title_short |
Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
title_full |
Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
title_fullStr |
Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
title_full_unstemmed |
Radiocarbon evidence for the stability of polar ocean overturning during the Holocene |
title_sort |
radiocarbon evidence for the stability of polar ocean overturning during the holocene |
publisher |
Springer Science and Business Media LLC |
publishDate |
2023 |
url |
https://www.repository.cam.ac.uk/handle/1810/355054 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) |
geographic |
Antarctic Southern Ocean The Antarctic Drake Passage Reykjanes |
geographic_facet |
Antarctic Southern Ocean The Antarctic Drake Passage Reykjanes |
genre |
Antarc* Antarctic Antarctica Drake Passage Iceland North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage Iceland North Atlantic Deep Water North Atlantic Southern Ocean |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/355054 |
_version_ |
1789960135300349952 |