Late Miocene onset of the modern Antarctic Circumpolar Current
The Antarctic Circumpolar Current plays a pivotal role in global climate through its strong influence on the global overturning circulation, ocean heat and CO uptake. However, when and how the Antarctic Circumpolar Current reached its modern-like characteristics remains disputed. Here we present neo...
| Autores: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/354812 |
| Acceso en línea: | http://hdl.handle.net/10261/354812 |
| Access Level: | acceso abierto |
| Palabra clave: | Antarctic Circumpolar Current Antarctic Ice Sheet Antarctica Southern Ocean Cenozoic Circumpolar current Global climate Miocene Neodymium isotope Sea ice Silt |
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Late Miocene onset of the modern Antarctic Circumpolar Current |
| title |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| spellingShingle |
Late Miocene onset of the modern Antarctic Circumpolar Current Evangelinos, Dimitris Antarctic Circumpolar Current Antarctic Ice Sheet Antarctica Southern Ocean Cenozoic Circumpolar current Global climate Miocene Neodymium isotope Sea ice Silt |
| title_short |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| title_full |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| title_fullStr |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| title_full_unstemmed |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| title_sort |
Late Miocene onset of the modern Antarctic Circumpolar Current |
| dc.creator.none.fl_str_mv |
Evangelinos, Dimitris Etourneau, Johan van de Flierdt, Tina Crosta, Xavier Jeandel, Catherine Flores, José Abel Harwood, David M. Valero, Luis Ducassou, Emmanuelle Sauermilch, Isabel Klocker, Andreas Cacho, Isabel Pena, Leopoldo D. Kreissig, Katharina Benoit, Mathie Paredes, Eduardo García-Solsona, Ester López-Quirós, Adrián Escutia, Carlota |
| author |
Evangelinos, Dimitris |
| author_facet |
Evangelinos, Dimitris Etourneau, Johan van de Flierdt, Tina Crosta, Xavier Jeandel, Catherine Flores, José Abel Harwood, David M. Valero, Luis Ducassou, Emmanuelle Sauermilch, Isabel Klocker, Andreas Cacho, Isabel Pena, Leopoldo D. Kreissig, Katharina Benoit, Mathie Paredes, Eduardo García-Solsona, Ester López-Quirós, Adrián Escutia, Carlota |
| author_role |
author |
| author2 |
Etourneau, Johan van de Flierdt, Tina Crosta, Xavier Jeandel, Catherine Flores, José Abel Harwood, David M. Valero, Luis Ducassou, Emmanuelle Sauermilch, Isabel Klocker, Andreas Cacho, Isabel Pena, Leopoldo D. Kreissig, Katharina Benoit, Mathie Paredes, Eduardo García-Solsona, Ester López-Quirós, Adrián Escutia, Carlota |
| author2_role |
author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Australian Research Council Ministère de l'Europe et des Affaires étrangères (France) Generalitat de Catalunya International Ocean Discovery Program Ministerio de Economía, Industria y Competitividad (España) UK Research and Innovation Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Antarctic Circumpolar Current Antarctic Ice Sheet Antarctica Southern Ocean Cenozoic Circumpolar current Global climate Miocene Neodymium isotope Sea ice Silt |
| topic |
Antarctic Circumpolar Current Antarctic Ice Sheet Antarctica Southern Ocean Cenozoic Circumpolar current Global climate Miocene Neodymium isotope Sea ice Silt |
| description |
The Antarctic Circumpolar Current plays a pivotal role in global climate through its strong influence on the global overturning circulation, ocean heat and CO uptake. However, when and how the Antarctic Circumpolar Current reached its modern-like characteristics remains disputed. Here we present neodymium isotope and sortable silt records from sediment cores in the Southwest Pacific and South Indian oceans spanning the past 31 million years. Our data indicate that a circumpolar current like that of today did not exist before the late Miocene cooling. These findings suggest that the emergence of a homogeneous and deep-reaching strong Antarctic Circumpolar Current was not linked solely to the opening and deepening of Southern Ocean Gateways triggering continental-scale Antarctic Ice Sheet expansion during the Eocene–Oligocene Transition (∼34 Ma). Instead, we find that besides tectonic pre-conditioning, the expansion of the Antarctic Ice Sheet and sea ice since the middle Miocene Climate Transition (∼14 Ma) played a crucial role. This led to stronger density contrast and intensified Southern Westerly Winds across the Southern Ocean, establishing a vigorous deep-reaching circumpolar flow and an enhanced global overturning circulation, which amplified the late Cenozoic global cooling. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2024 2024 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/354812 |
| url |
http://hdl.handle.net/10261/354812 |
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Inglés Inglés |
| language_invalid_str_mv |
Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-1-P info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-2-P info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-126495NB-C31 http://dx.doi.org/10.1038/s41561-023-01356-3 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
| dc.publisher.none.fl_str_mv |
Nature Publishing Group |
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Nature Publishing Group |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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1869407808425820160 |
| spelling |
Late Miocene onset of the modern Antarctic Circumpolar CurrentEvangelinos, DimitrisEtourneau, Johanvan de Flierdt, TinaCrosta, XavierJeandel, CatherineFlores, José AbelHarwood, David M.Valero, LuisDucassou, EmmanuelleSauermilch, IsabelKlocker, AndreasCacho, IsabelPena, Leopoldo D.Kreissig, KatharinaBenoit, MathieParedes, EduardoGarcía-Solsona, EsterLópez-Quirós, AdriánEscutia, CarlotaAntarctic Circumpolar CurrentAntarctic Ice SheetAntarcticaSouthern OceanCenozoicCircumpolar currentGlobal climateMioceneNeodymium isotopeSea iceSiltThe Antarctic Circumpolar Current plays a pivotal role in global climate through its strong influence on the global overturning circulation, ocean heat and CO uptake. However, when and how the Antarctic Circumpolar Current reached its modern-like characteristics remains disputed. Here we present neodymium isotope and sortable silt records from sediment cores in the Southwest Pacific and South Indian oceans spanning the past 31 million years. Our data indicate that a circumpolar current like that of today did not exist before the late Miocene cooling. These findings suggest that the emergence of a homogeneous and deep-reaching strong Antarctic Circumpolar Current was not linked solely to the opening and deepening of Southern Ocean Gateways triggering continental-scale Antarctic Ice Sheet expansion during the Eocene–Oligocene Transition (∼34 Ma). Instead, we find that besides tectonic pre-conditioning, the expansion of the Antarctic Ice Sheet and sea ice since the middle Miocene Climate Transition (∼14 Ma) played a crucial role. This led to stronger density contrast and intensified Southern Westerly Winds across the Southern Ocean, establishing a vigorous deep-reaching circumpolar flow and an enhanced global overturning circulation, which amplified the late Cenozoic global cooling.This research used samples provided by the International Ocean Discovery Program (IODP). We acknowledge the staff and shipboard party from Leg 28 and Leg 119. We thank the staff at the Gulf Coast core repository (GCR) for curating these cores and for assistance in core handling and shipping. Funding for this research is provided by the Spanish Ministry of Economy, Industry and Competitivity (grant CTM2017-89711-C2-1/2-P; PID2021-126495NB-C31), co-funded by the European Union through FEDER funds. D.E. was funded by the Alexander S. Onassis Public Benefit Foundation PhD research grant (F ZL 016-1/2015-2016), by MOPGA postdoctoral visiting fellowship programme funded by the French Ministry of Europe and Foreign Affairs (grant MOPGA postdoc-3–5669831615), by the Juan de la Cierva-formation postdoctoral research grant (FJC2020-043650-I) funded by MCIN/AEI/ 10.13039/501100011033 and the ‘European Union NextGenerationEU/PRTR’ and by the UK Research and Innovation Engineering and Physical Sciences Research Council (grant number EP/X02623X/1). D.E. received additional funding from an ECORD research grant and IODP-France. I.S. and A.K. were supported by the Australian Research Council Special Research Initiative for Antarctic Gateway Partnership (project ID SR140300001) and the Australian Research Council’s Discovery Project 180102280. Model runs were undertaken with the assistance of resources from the National Computational Infrastructure (NCI), which is supported by the Australian Government. We thank the Paleomagnetic Laboratory CCiTUB-Geo3Bcn CSIC for the support on palaeomagnetic analysis. The GRC Geociències Marines thanks the Generalitat de Catalunya for the Grups de Recerca Consolidats grant 2021SGR01195 and for the ICREA-Academia award to I.C. This paper is a contribution to the SCAR INSTANT Programme.Peer reviewedNature Publishing GroupAustralian Research CouncilMinistère de l'Europe et des Affaires étrangères (France)Generalitat de CatalunyaInternational Ocean Discovery ProgramMinisterio de Economía, Industria y Competitividad (España)UK Research and InnovationConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/354812reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésInglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-1-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-2-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-126495NB-C31http://dx.doi.org/10.1038/s41561-023-01356-3Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3548122026-05-22T06:33:51Z |
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15.81155 |