Data/hora: 07/06/2024 00:47:48

Provedor de dados: | 5
País: | France
Título: | Quantitative estimate of the paleo-Agulhas leakage
Autores: | Caley, Thibaut; Peeters, Frank J. C.; Biastoch, Arne; Rossignol, Linda; Van Sebille, Erik; Durgadoo, Jonathan; Malaize, Bruno; Giraudeau, Jacques; Arthur, Kristina; Zahn, Rainer.
Data: | 2014-02-20
Ano: | 2014
Palavras-chave: | Quantitative palaeo Agulhas leakage; Planktic foraminiferal; Numerical ocean model; Overturning circulation.
Resumo: | The Indian-Atlantic water exchange south of Africa (Agulhas leakage) is a key component of the global ocean circulation. No quantitative estimation of the paleo-Agulhas leakage exists. We quantify the variability in interocean exchange over the past 640,000 years, using planktic foraminiferal assemblage data from two marine sediment records to define an Agulhas leakage efficiency index. We confirm the validity of our new approach with a numerical ocean model that realistically simulates the modern Agulhas leakage changes. Our results suggest that, during the past several glacial-interglacial cycles, the Agulhas leakage varied by ~10 sverdrup and more during major climatic transitions. This lends strong credence to the hypothesis that modifications in the leakage played a key role in changing the overturning circulation to full strength mode. Our results are instrumental for validating and quantifying the contribution of the Indian-Atlantic water leakage to the global climate changes.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00291/40172/39028.pdf

https://archimer.ifremer.fr/doc/00291/40172/39029.pdf

https://archimer.ifremer.fr/doc/00291/40172/39030.pdf

https://archimer.ifremer.fr/doc/00291/40172/39031.pdf

https://archimer.ifremer.fr/doc/00291/40172/39032.pdf

https://archimer.ifremer.fr/doc/00291/40172/39033.pdf

https://archimer.ifremer.fr/doc/00291/40172/39034.pdf

DOI:10.1002/2014GL059278

https://archimer.ifremer.fr/doc/00291/40172/

Editor: | Amer Geophysical Union
Relação: | info:eu-repo/grantAgreement/EC/FP7/243908/EU//PAST4FUTURE
Formato: | application/pdf
Fonte: | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2014-02-20 , Vol. 41 , N. 4 , P. 1238-1246

Fonte:

2014. American Geophysical Union. All Rights Reserved.

info:eu-repo/semantics/openAccess

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