Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years
The Antarctic Circumpolar Current (ACC) plays a crucial role in global ocean circulation by fostering deep-water upwelling and formation of new water masses. On geological time-scales, ACC variations are poorly constrained beyond the last glacial. Here, we reconstruct changes in ACC strength in the...
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Nature Research
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52997/ https://oceanrep.geomar.de/id/eprint/52997/1/s41467-021-24264-9.pdf https://oceanrep.geomar.de/id/eprint/52997/2/41467_2021_24264_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/52997/13/s41467-021-24264-9.pdf https://doi.org/10.1038/s41467-021-24264-9 |
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ftoceanrep:oai:oceanrep.geomar.de:52997 2024-02-11T09:58:38+01:00 Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years Wu, Shuzhuang Lembke-Jene, Lester Lamy, Frank Arz, Helge W. Nowaczyk, Norbert Xiao, Wenshen Zhang, Xu Hass, H. Christian Titschack, Jürgen Zheng, Xufeng Liu, Jiabo Dumm, Levin Diekmann, Bernhard Nürnberg, Dirk Tiedemann, Ralf Kuhn, Gerhard 2021-06-24 text https://oceanrep.geomar.de/id/eprint/52997/ https://oceanrep.geomar.de/id/eprint/52997/1/s41467-021-24264-9.pdf https://oceanrep.geomar.de/id/eprint/52997/2/41467_2021_24264_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/52997/13/s41467-021-24264-9.pdf https://doi.org/10.1038/s41467-021-24264-9 en eng Nature Research https://oceanrep.geomar.de/id/eprint/52997/1/s41467-021-24264-9.pdf https://oceanrep.geomar.de/id/eprint/52997/2/41467_2021_24264_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/52997/13/s41467-021-24264-9.pdf Wu, S., Lembke-Jene, L., Lamy, F., Arz, H. W., Nowaczyk, N., Xiao, W., Zhang, X., Hass, H. C., Titschack, J., Zheng, X., Liu, J., Dumm, L., Diekmann, B., Nürnberg, D. , Tiedemann, R. and Kuhn, G. (2021) Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years. Open Access Nature Communications, 12 . Art.Nr. 3948. DOI 10.1038/s41467-021-24264-9 <https://doi.org/10.1038/s41467-021-24264-9>. doi:10.1038/s41467-021-24264-9 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1038/s41467-021-24264-9 2024-01-15T00:23:45Z The Antarctic Circumpolar Current (ACC) plays a crucial role in global ocean circulation by fostering deep-water upwelling and formation of new water masses. On geological time-scales, ACC variations are poorly constrained beyond the last glacial. Here, we reconstruct changes in ACC strength in the central Drake Passage in vicinity of the modern Polar Front over a complete glacial-interglacial cycle (i.e., the past 140,000 years), based on sediment grain-size and geochemical characteristics. We found significant glacial-interglacial changes of ACC flow speed, with weakened current strength during glacials and a stronger circulation in interglacials. Superimposed on these orbital-scale changes are high-amplitude millennial-scale fluctuations, with ACC strength maxima correlating with diatom-based Antarctic winter sea-ice minima, particularly during full glacial conditions. We infer that the ACC is closely linked to Southern Hemisphere millennial-scale climate oscillations, amplified through Antarctic sea ice extent changes. These strong ACC variations modulated Pacific-Atlantic water exchange via the “cold water route” and potentially affected the Atlantic Meridional Overturning Circulation and marine carbon storage. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Drake Passage Pacific The Antarctic Nature Communications 12 1 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The Antarctic Circumpolar Current (ACC) plays a crucial role in global ocean circulation by fostering deep-water upwelling and formation of new water masses. On geological time-scales, ACC variations are poorly constrained beyond the last glacial. Here, we reconstruct changes in ACC strength in the central Drake Passage in vicinity of the modern Polar Front over a complete glacial-interglacial cycle (i.e., the past 140,000 years), based on sediment grain-size and geochemical characteristics. We found significant glacial-interglacial changes of ACC flow speed, with weakened current strength during glacials and a stronger circulation in interglacials. Superimposed on these orbital-scale changes are high-amplitude millennial-scale fluctuations, with ACC strength maxima correlating with diatom-based Antarctic winter sea-ice minima, particularly during full glacial conditions. We infer that the ACC is closely linked to Southern Hemisphere millennial-scale climate oscillations, amplified through Antarctic sea ice extent changes. These strong ACC variations modulated Pacific-Atlantic water exchange via the “cold water route” and potentially affected the Atlantic Meridional Overturning Circulation and marine carbon storage. |
format |
Article in Journal/Newspaper |
author |
Wu, Shuzhuang Lembke-Jene, Lester Lamy, Frank Arz, Helge W. Nowaczyk, Norbert Xiao, Wenshen Zhang, Xu Hass, H. Christian Titschack, Jürgen Zheng, Xufeng Liu, Jiabo Dumm, Levin Diekmann, Bernhard Nürnberg, Dirk Tiedemann, Ralf Kuhn, Gerhard |
spellingShingle |
Wu, Shuzhuang Lembke-Jene, Lester Lamy, Frank Arz, Helge W. Nowaczyk, Norbert Xiao, Wenshen Zhang, Xu Hass, H. Christian Titschack, Jürgen Zheng, Xufeng Liu, Jiabo Dumm, Levin Diekmann, Bernhard Nürnberg, Dirk Tiedemann, Ralf Kuhn, Gerhard Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
author_facet |
Wu, Shuzhuang Lembke-Jene, Lester Lamy, Frank Arz, Helge W. Nowaczyk, Norbert Xiao, Wenshen Zhang, Xu Hass, H. Christian Titschack, Jürgen Zheng, Xufeng Liu, Jiabo Dumm, Levin Diekmann, Bernhard Nürnberg, Dirk Tiedemann, Ralf Kuhn, Gerhard |
author_sort |
Wu, Shuzhuang |
title |
Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
title_short |
Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
title_full |
Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
title_fullStr |
Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
title_full_unstemmed |
Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years |
title_sort |
orbital- and millennial-scale antarctic circumpolar current variability in drake passage over the past 140,000 years |
publisher |
Nature Research |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52997/ https://oceanrep.geomar.de/id/eprint/52997/1/s41467-021-24264-9.pdf https://oceanrep.geomar.de/id/eprint/52997/2/41467_2021_24264_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/52997/13/s41467-021-24264-9.pdf https://doi.org/10.1038/s41467-021-24264-9 |
geographic |
Antarctic Drake Passage Pacific The Antarctic |
geographic_facet |
Antarctic Drake Passage Pacific The Antarctic |
genre |
Antarc* Antarctic Drake Passage Sea ice |
genre_facet |
Antarc* Antarctic Drake Passage Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/52997/1/s41467-021-24264-9.pdf https://oceanrep.geomar.de/id/eprint/52997/2/41467_2021_24264_MOESM1_ESM.pdf https://oceanrep.geomar.de/id/eprint/52997/13/s41467-021-24264-9.pdf Wu, S., Lembke-Jene, L., Lamy, F., Arz, H. W., Nowaczyk, N., Xiao, W., Zhang, X., Hass, H. C., Titschack, J., Zheng, X., Liu, J., Dumm, L., Diekmann, B., Nürnberg, D. , Tiedemann, R. and Kuhn, G. (2021) Orbital- and millennial-scale Antarctic Circumpolar Current variability in Drake Passage over the past 140,000 years. Open Access Nature Communications, 12 . Art.Nr. 3948. DOI 10.1038/s41467-021-24264-9 <https://doi.org/10.1038/s41467-021-24264-9>. doi:10.1038/s41467-021-24264-9 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-021-24264-9 |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1790594353141383168 |