Impacts of Agulhas Leakage on the Tropical Atlantic Western Boundary Systems

Autor(es)

Castellanos, P. ; Campos, E. J. D. ; Piera, J. ; Sato, O. T. ; Silva Dias, M. A. F.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Climate; v. 30, n. 17, p. 6645-6659, SEP 2017.
• Citações Web of Science: 2

Resumo

The influx of warmer and saltier Indian Ocean waters into the Atlantic-the Agulhas leakage-is now recognized to play an important role in the global thermohaline circulation and climate. In this study the results of a (1)/12 degrees simulation with the Hybrid Coordinate Ocean Model, which exhibit an augmentation in the Agulhas leakage, is investigated. This increase in the leakage ought to have an impact on the meridional oceanic volume and heat transports in the Atlantic Ocean. Significant linear trends found in the integrated transport at 20 degrees, 15 degrees, and 5 degrees S correlate well with decadal fluctuations of the Agulhas leakage. The augmented transport also seems to be related to an increase in the latent heat flux observed along the northeastern coastline of Brazil since 2003. This study shows that the precipitation on the Brazilian coast has been increasing since 2005, at the same location and with the same regime shift observed for the latent heat flux and the volume transport. This suggests that the increase of the Agulhas transport affects the western boundary system of the tropical Atlantic Ocean, which is directly related to an increase in the precipitation and latent heat flux along the western coast. (AU)

• Processo FAPESP: 13/08572-3 - Trocas oceânicas inter-hemisféricas: conexões Trópico-Extratrópico no Atlântico Sul - análises de observações e resultados numéricos
• Beneficiário: Paola Maria Castellano Ossa Fernandes
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 11/50552-4 - Impacto do Atlântico Sul na célula de circulação meridional e no clima
• Beneficiário: Edmo José Dias Campos
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 08/58101-9 - Impact of the Southwestern Atlantic Ocean on South American climate for the 20th and 21st centuries
• Beneficiário: Tercio Ambrizzi
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 15/11366-1 - O papel do Atlântico Sul na distribuição de calor e de equilíbrio de massa na circulação global: hiato da mudança climática?
• Beneficiário: Paola Maria Castellano Ossa Fernandes
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado