Coupled changes in western South Atlantic carbon sequestration and particle reactive element cycling during millennial-scale Holocene climate variability.
Authors
Dias, Bruna B
Piotrowski, Alexander M
Barbosa, Cátia F
Venancio, Igor M
Chiessi, Cristiano M
Albuquerque, Ana Luiza S
Publication Date
2021-12-21Journal Title
Sci Rep
ISSN
2045-2322
Publisher
Springer Science and Business Media LLC
Volume
11
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Dias, B. B., Piotrowski, A. M., Barbosa, C. F., Venancio, I. M., Chiessi, C. M., & Albuquerque, A. L. S. (2021). Coupled changes in western South Atlantic carbon sequestration and particle reactive element cycling during millennial-scale Holocene climate variability.. Sci Rep, 11 (1) https://doi.org/10.1038/s41598-021-03821-8
Description
Funder: Alexander von Humboldt Foundation
Funder: Petrobras/CENPES Geochemistry Network
Funder: National Petroleum Agency of Brazil
Abstract
ABSTRACT: Continental shelves have the potential to remove atmospheric carbon dioxide via the biological pump, burying it in seafloor sediments. The efficiency of marine carbon sequestration changes rapidly due to variations in biological productivity, organic carbon oxidation, and burial rate. Here we present a high temporal resolution record of marine carbon sequestration changes from a western South Atlantic shelf site sensitive to Brazil Current-driven upwelling. The comparison of biological records to rare earth element (REE) patterns from authigenic oxides shows a strong relationship between higher biological productivity and stronger particle reactive element cycling (i.e. REE cycling) during rapid climate change events. This is the first evidence that authigenic oxides archive past changes in upper ocean REE cycling by the exported organic carbon. In addition, our data suggest that Brazil Current-driven upwelling varies on millennial-scales and in time with continental precipitation anomalies as registered in Brazilian speleothems during the Holocene. This indicates an ocean-atmosphere control on the biological pump, most probably related to South American monsoon system variability.
Keywords
Article, /704/47/4113, /704/47/4112, /704/106/2738, /704/106/413, article
Sponsorship
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (88887.156152/2017-00, 88881.313535/2019-01)
Fundação de Amparo à Pesquisa do Estado de São Paulo (20/11452-3, 18/15123-4)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (312458/2020-7, 302521-2017-8)
Identifiers
s41598-021-03821-8, 3821
External DOI: https://doi.org/10.1038/s41598-021-03821-8
This record's URL: https://www.repository.cam.ac.uk/handle/1810/332066
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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