Data/hora: 09/06/2024 10:39:21

Provedor de dados: | 5
País: | France
Título: | Radiocarbon evidence for enhanced respired carbon storage in the Atlantic at the Last Glacial Maximum
Autores: | Freeman, E.; Skinner, L. C.; Waelbroeck, C.; Hodell, D.
Data: | 2016-06
Ano: | 2016
Resumo: | The influence of ocean circulation changes on atmospheric CO2 hinges primarily on the ability to alter the ocean interior's respired nutrient inventory. Here we investigate the Atlantic overturning circulation at the Last Glacial Maximum and its impact on respired carbon storage using radiocarbon and stable carbon isotope data from the Brazil and Iberian Margins. The data demonstrate the existence of a shallow well-ventilated northern-sourced cell overlying a poorly ventilated, predominantly southern-sourced cell at the Last Glacial Maximum. We also find that organic carbon remineralization rates in the deep Atlantic remained broadly similar to modern, but that ventilation ages in the southern-sourced overturning cell were significantly increased. Respired carbon storage in the deep Atlantic was therefore enhanced during the last glacial period, primarily due to an increase in the residence time of carbon in the deep ocean, rather than an increase in biological carbon export.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00421/53241/54750.pdf

https://archimer.ifremer.fr/doc/00421/53241/54751.pdf

DOI:10.1038/ncomms11998

https://archimer.ifremer.fr/doc/00421/53241/

Editor: | Nature Publishing Group
Relação: | info:eu-repo/grantAgreement/EC/FP7/339108/EU//ACCLIMATE
Formato: | application/pdf
Fonte: | Nature Communications (2041-1723) (Nature Publishing Group), 2016-06 , Vol. 7 , N. 11998 , P. 1-8-

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