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The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean

Laboratório de Estudos dos Oceanos e Clima, Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), Av. Itália km 8, s/n, Rio Grande, RS 96203-900, Brazil
Brazilian Ocean Acidification Network (BrOA), Av. Itália km 8, Rio Grande, RS 96203-900, Brazil
IMAGES_ESPACE-DEV, Université de Perpignan Via Domitia (UPVD), 52 ave. Paul Alduy, 66860 Perpignan, France
ESPACE-DEV UMR UG UA UM IRD, Maison de la télédétection, 500 rue Jean-François Breton, CEDEX 5, 34093 Montpellier, France
Laboratório de Oceanografia Física, Estuarina e Costeira (LOFEC), Departamento de Oceanografia, Centro de Tecnologia, Universidade Federal de Pernambuco (UFPE), Av. Arquitetura, s/n, Recife, PE 50740550, Brazil
Brazilian Research Network on Global Climate Change (Rede CLIMA), São José dos Campos, SP 2227-010, Brazil
Programa de Pós-graduação em Oceanografia, Universidade Federal de Santa Catarina (UFSC), Campus Reitor João David Ferreira Lima, s/n, Florianópolis, SC 8040-900, Brazil
Author to whom correspondence should be addressed.
Climate 2019, 7(6), 84;
Received: 17 May 2019 / Revised: 9 June 2019 / Accepted: 11 June 2019 / Published: 18 June 2019
(This article belongs to the Special Issue Ocean Warming, Acidification and Deoxygenation)
The South Atlantic Ocean is currently undergoing significant alterations due to climate change. This region is important to the global carbon cycle, but marine carbon data are scarce in this basin. Additionally, this region is influenced by Agulhas eddies. However, their effects on ocean biogeochemistry are not yet fully understood. Thus, we aimed to model the carbonate parameters in this region and investigate the anthropogenic carbon (Cant) content in 13 eddies shed by the Agulhas retroflection. We used in situ data from the CLIVAR/WOCE/A10 section to elaborate total dissolved inorganic carbon (CT) and total alkalinity (AT) models and reconstruct those parameters using in situ data from two other Brazilian initiatives. Furthermore, we applied the Tracer combining Oxygen, inorganic Carbon, and total Alkalinity (TrOCA) method to calculate the Cant, focusing on the 13 identified Agulhas eddies. The CT and AT models presented root mean square errors less than 1.66 and 2.19 μmol kg−1, indicating Global Ocean Acidification Observing Network climate precision. The Cant content in the Agulhas eddies was 23% higher than that at the same depths of the surrounding waters. We observed that Agulhas eddies can play a role in the faster acidification of the South Atlantic Central Water. View Full-Text
Keywords: carbonate system; anthropogenic carbon; Agulhas eddies; South Atlantic Ocean carbonate system; anthropogenic carbon; Agulhas eddies; South Atlantic Ocean
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Orselli, I.B.M.; Goyet, C.; Kerr, R.; Azevedo, J.L.L.; Araujo, M.; Galdino, F.; Touratier, F.; Garcia, C.A.E. The Effect of Agulhas Eddies on Absorption and Transport of Anthropogenic Carbon in the South Atlantic Ocean. Climate 2019, 7, 84.

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