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dc.contributor.authorYu, J.
dc.contributor.authorMenviel, L.
dc.contributor.authorJin, Z. D.
dc.contributor.authorAnderson, R. F.
dc.contributor.authorJian, Z.
dc.contributor.authorPiotrowski, A. M.
dc.contributor.authorMa, X.
dc.contributor.authorRohling, E. J.
dc.contributor.authorZhang, F.
dc.contributor.authorMarino , Gianluca 
dc.contributor.authorMcManus, J. F.
dc.date.accessioned2024-02-20T13:58:44Z
dc.date.available2024-02-20T13:58:44Z
dc.date.issued2020-07-20
dc.identifier.citationNature Geoscience, 13(9): 628-633 (2020)spa
dc.identifier.issn17520894
dc.identifier.issn17520908
dc.identifier.urihttp://hdl.handle.net/11093/6303
dc.description.abstractOcean circulation critically affects the global climate and atmospheric carbon dioxide through redistribution of heat and carbon in the Earth system. Despite intensive research, the nature of past ocean circulation changes remains elusive. Here we present deep-water carbonate ion concentration reconstructions for widely distributed locations in the Atlantic Ocean, where low carbonate ion concentrations indicate carbon-rich waters. These data show a low-carbonate-ion water mass that extended northward up to about 20° S in the South Atlantic at 3–4 km depth during the Last Glacial Maximum. In combination with radiocarbon ages, neodymium isotopes and carbon isotopes, we conclude that this low-carbonate-ion signal reflects a widespread expansion of carbon-rich Pacific deep waters into the South Atlantic, revealing a glacial deep Atlantic circulation scheme different than commonly considered. Comparison of high-resolution carbonate ion records from different water depths in the South Atlantic indicates that this Pacific deep-water expansion developed from approximately 38,000 to 28,000 years ago. We infer that its associated carbon sequestration may have contributed critically to the contemporaneous decline in atmospheric carbon dioxide, thereby helping to initiate the glacial maximum.en
dc.description.sponsorshipAustralian Research Council | Ref. DP140101393spa
dc.description.sponsorshipAustralian Research Council | Ref. DP190100894spa
dc.description.sponsorshipAustralian Research Council | Ref. FT140100993spa
dc.description.sponsorshipAustralian Research Council | Ref. FT180100606spa
dc.description.sponsorshipAustralian Research Council | Ref. DP180100048spa
dc.description.sponsorshipAustralian Research Council | Ref. FL120100050spa
dc.description.sponsorshipNational Science Foundation of China | Ref. 41991322spa
dc.description.sponsorshipNational Science Foundation of China | Ref. 41930864spa
dc.language.isoengspa
dc.publisherNature Geosciencespa
dc.rightsCopyright © 2020, The Author(s), under exclusive license to Springer Nature Limited
dc.titleLast glacial atmospheric CO2 decline due to widespread Pacific deep-water expansionen
dc.typearticlespa
dc.rights.accessRightsopenAccessspa
dc.identifier.doi10.1038/s41561-020-0610-5
dc.identifier.editorhttps://www.nature.com/articles/s41561-020-0610-5spa
dc.publisher.departamentoXeociencias mariñas e ordenación do territoriospa
dc.publisher.grupoinvestigacionXeoloxía Mariña e Ambientalspa
dc.subject.unesco2503.09 Distribución de Elementos Trazaspa
dc.subject.unesco2502.05 Paleoclimatologíaspa
dc.date.updated2024-02-09T14:59:38Z
dc.computerCitationpub_title=Nature Geoscience|volume=13|journal_number=9|start_pag=628|end_pag=633spa


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