Portal de Periódicos da CAPES

Artigo Produção Nacional

BIBTEX RIS

Low-frequency circulation on the Ilha Grande channel, Rio de Janeiro, Brazil

2021; Elsevier BV; Volume: 50; Linguagem: Inglês

10.1016/j.rsma.2021.102129

2352-4855

Douglas Fraga Rodrigues, Alexandre Macedo Fernandes, Alessandro Filippo, Björn Kjerfve, Lı́gia Pinto, Ramiro Neves,

Coastal and Marine Dynamics

Several papers from the 1970s to 1990s reported a persistent eastward current in the Ilha Grande channel, which used no longer than 30 days’ time series of measured data and numerical models limited to the technology available at the time. Until now, this current was attributed to the density differences in the interior of Ilha Grande Bay. In the present work, the analysis of a 15-month time series of current data associated with the evaluation of three-dimensional numerical experiments allowed the investigation of this current in greater detail. Thus, it was possible to verify that the eastward along-channel current inside the channel behaves as a permanent circulation. Unlike it was believed, this current is associated with a subsurface eastward coastal current that flows along the coast. This current, in turn, is caused by the adjustment of density fields over the adjacent shelf and oceanic region.