Ocean-estuary exchange variability in a large tropical estuary
Por:
Aguiar A.L., Valle-Levinson A., Cirano M., Marta-Almeida M., Lessa G.C., Paniagua-Arroyave J.F.
Publicada:
1 ene 2019
Resumen:
Ocean-estuary exchange variability was studied from 2008 to 2014 at a low latitude coastal plain estuary, Todos os Santos Bay, Brazil, near 13°S. Wind data from Climate Forecast System Reanalysis (CFSR) were used to complement the results of a high-resolution regional ocean model, ROMS. Volume exchange occurred under two distinct circulation patterns, namely Circ+ and Circ-, that matched the down-estuary (spring/summer) and up-estuary (autumn/winter) wind regimes respectively. Circ+ promoted water-column stratification, while Circ- lasted longer, induced more volume exchange, and reversed the estuarine circulation. In addition, a clockwise lateral circulation (looking into the estuary) occurred during Circ+, whereas a counterclockwise lateral circulation was observed during Circ-. Connectivity was observed between Jaguaripe River and Todos os Santos Bay entrance. Increases in Jaguaripe River discharge, in conjunction with up-estuary winds, promoted a northward advection of the river plume toward the main entrance of the estuary, creating a lateral density gradient over Todos os Santos Bay’ western shoal. Our results demonstrate that findings about estuarine circulation at higher latitudes are applicable to low latitude estuaries when dynamical depth and/or basin's width indicate that Earth's rotation is relevant. © 2018 Elsevier Ltd
Filiaciones:
Aguiar A.L.:
Programa de Pós Graduação em Geofísica, Universidade Federal da Bahia (UFBA), Brazil
Grupo de Oceanografia Tropical (GOAT), Instituto de Física, Universidade Federal da Bahia (UFBA), Brazil
Rede de Modelagem e Observação Oceanográfica (REMO), Brazil
Valle-Levinson A.:
Department of Civil and Coastal Engineering, University of Florida, 365 Weil Hall, Gainesville, FL 32611, United States
Cirano M.:
Departamento de Meteorologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro (UFRJ), Brazil
Rede de Modelagem e Observação Oceanográfica (REMO), Brazil
Marta-Almeida M.:
Centro Oceanográfico de A Coruña, Instituto Español de Oceanografia, A Coruña, Galícia 15001, Spain
Universidade de Vigo, Vigo, 36310, Spain
Lessa G.C.:
Grupo de Oceanografia Tropical (GOAT), Instituto de Física, Universidade Federal da Bahia (UFBA), Brazil
Paniagua-Arroyave J.F.:
Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, United States
Área de Ciencias del Mar, Universidad EAFIT, Medellín, Antioquia, Colombia
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