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International Journal of Oceanography - Volume 2015 2015, Article ID 965314, 15 pages -

Research Article

Universidade Federal do Rio de Janeiro, COPPE, Programa de Engenharia Civil, Laboratório de Métodos Computacionais em Engenharia, Avenida Athos da Silveira Ramos 149, Cidade Universitária, Ilha do Fundão, 21941-909 Rio de Janeiro, RJ, Brazil

Instituto de Estudos do Mar Almirante Paulo Moreira, Divisão de Oceanografia Física, Rua Kioto 253, Arraial do Cabo, 28930-000 Rio de Janeiro, RJ, Brazil

Received 3 July 2014; Revised 29 November 2014; Accepted 18 December 2014

Academic Editor: Swadhin Behera

Copyright © 2015 Luiz Paulo de Freitas Assad et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The knowledge of wind stress variability could represent an important contribution to understand the variability over upper layer ocean volume transports. The South Brazilian Bight SBB circulation had been studied by numerous researchers who predominantly attempted to estimate its meridional volume transport. The main objective and contribution of this study is to identify and quantify possible interannual variability in the ocean volume transport in the SBB induced by the sea surface wind stress field. A low resolution ocean global circulation model was implemented to investigate the volume transport variability. The results obtained indicate the occurrence of interannual variability in meridional ocean volume transports along three different zonal sections. These results also indicate the influence of a wind driven large-scale atmospheric process that alters locally the SBB and near-offshore region wind stress field and consequently causes interannual variability in the upper layer ocean volume transports. A strengthening of the southward flow in 25°S and 30°S was observed. The deep layer ocean volume transport in the three monitored sections indicates a potential dominance of other remote ocean processes. A small time lag between the integrated meridional volume transports changes in each monitored zonal section was observed.





Autor: Luiz Paulo de Freitas Assad, Carina Stefoni Böck, Rogerio Neder Candella, and Luiz Landau

Fuente: https://www.hindawi.com/



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