Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th

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Ressource 1Télécharger: Ronge et al., 21.pdf (3420.83 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_E89266303BD1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Deglacial patterns of South Pacific overturning inferred from 231Pa and 230Th
Périodique
Scientific Reports
Auteur⸱e⸱s
Ronge Thomas A., Lippold Jörg, Geibert Walter, Jaccard Samuel L., Mieruch-Schnülle Sebastian, Süfke Finn, Tiedemann Ralf
ISSN
2045-2322
Statut éditorial
Publié
Date de publication
12/2021
Peer-reviewed
Oui
Volume
11
Numéro
1
Langue
anglais
Résumé
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 231Pa/230Th‐proxy in the Pacific. Here, we present five sedimentary down‐core profiles of 231Pa/230Th‐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.
Mots-clé
Multidisciplinary
Open Access
Oui
Financement(s)
Fonds national suisse / Carrières / PP00P2_172915
Création de la notice
15/10/2021 7:56
Dernière modification de la notice
16/10/2021 7:13
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