English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Previous studies have pointed out an intensification of the global western boundary currents induced by changes in the wind-stress curl patterns over the oceans. The Brazil Current (BC) is the western boundary current into the South Atlantic Subtropical Gyre, which flows southwards along the Brazilian coast. A numerical model is used to investigate the response of BC to this change in wind forcing between 1960-2010, across 30oS. The results found here support the increasing trend noticed in the wind-stress curl and a poleward migration of the South Hemisphere westerlies in the past decades. The residual transport of BC at 30_S is composed by its southward main flow and the northward branch of a recirculation cell (Rec) east of the BC. Both the BC and Rec transports showed a decrease trend of 0.10 Sv dec1 and 0.28 Sv dec1, respectively. It suggests a southward migration of Rec in response to changes in the westerlies. The results also indicate a relative intensification in the western boundary transport and a strengthening in the South Atlantic Subtropical Gyre. Keywords: Western Boundary Current, Meridional Transport, HYCOM. RESUMO. Estudos anteriores apontam para uma intensificacao das correntes de contorno oeste globais induzidas por mudancas no rotacional do estresse do vento sobre os oceanos. A Corrente do Brasil (CB) e a corrente de contorno oeste do giro Subtropical do Atlântico Sul, que flui para sul ao longo da costa brasileira. Um modelo numerico e usado para investigar a resposta da CB as mudancas na forcante do vento entre 1960-2010, ao longo de 30_S. Os resultados encontrados aqui suportam a tendencia de aumento observada no rotacional do estresse do vento e a migracao para o polo dos ventos de oeste do hemisferio sul nas ultimas decadas. O transporte residual da CB em 30oS e composto pelo seu fluxo principal para sul e o braco para norte de uma celula de recirculacao (Rec) a leste da CB. Ambos os transportes da CB e Rec mostraram uma tendencia de reducao de 0,10 Sv dec1 e 0,28 Sv dec1, respectivamente. Isto sugere uma migracao para sul da Rec em resposta as mudancas dos ventos de oeste. Os resultados tambem indicam uma relativa intensificacao do transporte na borda oeste e um fortalecimento do giro Subtropical do Atlântico Sul. Palavras-chave: Corrente de Contorno Oeste, Transporte Meridional, HYCOM.

IMPACTS OF SOUTHERN HEMISPHERE WESTERLIES ON THE BRAZIL CURRENT AT 30°S