Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th
Abstract The millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) is well documented for the last glacial termination and beyond. Despite its importance for the climate system, the evolution of the South Pacific overturning circulation (SPOC) is by far less well und...
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2021
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Online Access: | http://dx.doi.org/10.1038/s41598-021-00111-1 https://www.nature.com/articles/s41598-021-00111-1.pdf https://www.nature.com/articles/s41598-021-00111-1 |
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crspringernat:10.1038/s41598-021-00111-1 2023-05-15T18:25:21+02:00 Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th Ronge, Thomas A. Lippold, Jörg Geibert, Walter Jaccard, Samuel L. Mieruch-Schnülle, Sebastian Süfke, Finn Tiedemann, Ralf Deutsche Forschungsgemeinschaft Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 2021 http://dx.doi.org/10.1038/s41598-021-00111-1 https://www.nature.com/articles/s41598-021-00111-1.pdf https://www.nature.com/articles/s41598-021-00111-1 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-00111-1 2022-01-04T12:53:06Z Abstract The millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) is well documented for the last glacial termination and beyond. Despite its importance for the climate system, the evolution of the South Pacific overturning circulation (SPOC) is by far less well understood. A recently published study highlights the potential applicability of the 231 Pa/ 230 Th-proxy in the Pacific. Here, we present five sedimentary down-core profiles of 231 Pa/ 230 Th-ratios measured on a depth transect from the Pacific sector of the Southern Ocean to test this hypothesis using downcore records. Our data are consistent with an increase in SPOC as early as 20 ka that peaked during Heinrich Stadial 1. The timing indicates that the SPOC did not simply react to AMOC changes via the bipolar seesaw but were triggered via Southern Hemisphere processes. Article in Journal/Newspaper Southern Ocean Springer Nature (via Crossref) Pacific Southern Ocean Scientific Reports 11 1 |
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Springer Nature (via Crossref) |
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crspringernat |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Ronge, Thomas A. Lippold, Jörg Geibert, Walter Jaccard, Samuel L. Mieruch-Schnülle, Sebastian Süfke, Finn Tiedemann, Ralf Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
topic_facet |
Multidisciplinary |
description |
Abstract The millennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) is well documented for the last glacial termination and beyond. Despite its importance for the climate system, the evolution of the South Pacific overturning circulation (SPOC) is by far less well understood. A recently published study highlights the potential applicability of the 231 Pa/ 230 Th-proxy in the Pacific. Here, we present five sedimentary down-core profiles of 231 Pa/ 230 Th-ratios measured on a depth transect from the Pacific sector of the Southern Ocean to test this hypothesis using downcore records. Our data are consistent with an increase in SPOC as early as 20 ka that peaked during Heinrich Stadial 1. The timing indicates that the SPOC did not simply react to AMOC changes via the bipolar seesaw but were triggered via Southern Hemisphere processes. |
author2 |
Deutsche Forschungsgemeinschaft Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) |
format |
Article in Journal/Newspaper |
author |
Ronge, Thomas A. Lippold, Jörg Geibert, Walter Jaccard, Samuel L. Mieruch-Schnülle, Sebastian Süfke, Finn Tiedemann, Ralf |
author_facet |
Ronge, Thomas A. Lippold, Jörg Geibert, Walter Jaccard, Samuel L. Mieruch-Schnülle, Sebastian Süfke, Finn Tiedemann, Ralf |
author_sort |
Ronge, Thomas A. |
title |
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
title_short |
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
title_full |
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
title_fullStr |
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
title_full_unstemmed |
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th |
title_sort |
deglacial patterns of south pacific overturning inferred from 231pa and 230th |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-00111-1 https://www.nature.com/articles/s41598-021-00111-1.pdf https://www.nature.com/articles/s41598-021-00111-1 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
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/s41598-021-00111-1 |
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Scientific Reports |
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11 |
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1 |
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1766206756672765952 |