Ocean Dynamics

, Volume 65, Issue 12, pp 1731–1741 | Cite as

Hydrodynamics and water properties at the entrance of Araçá Bay, Brazil

  • Marcelo Dottori
  • Eduardo Siegle
  • Belmiro Mendes Castro
Part of the following topical collections:
  1. Topical Collection on Physics of Estuaries and Coastal Seas 2014 in Porto de Galinhas, PE, Brazil, 19-23 October 2014


Current meter and hydrographic properties at the entrance of the Araçá Bay (AB), an intertidal flat adjacent to the São Sebastião channel, were collected between July 2013 and February 2014. These data sets show two different hydrographic periods, marked by a sharp change in the temperature and salinity values, clearly caused by the arrival of the South Atlantic Central Water (SACW). The first period is characterized by small variabilities on both properties with the dominance of coastal water, with relatively low salinity values. The second period shows a strong increase in the average salinity values and a much larger variability of temperature. This change in the hydrographic characteristics seems to be caused by anomalous winds, capable of displacing the SACW toward the coast. On the other hand, current meter data shows that the dynamics is mainly driven by the large-scale wind and is not impacted by the arrival of the SACW. Also, the currents are dominated by the barotropic mode, independently of the stratification differences that are observed between the beginning and end of the observational period.


Araçá Bay Hydrodynamics Hydrography South Atlantic Central Water 



This study was funded by FAPESP (Fundação de Apoio a Pesquisa do Estado de São Paulo) through the project “Biodiversity and Functioning of a Subtropical Coastal Ecosystem: a contribution to integrated management” (FAPESP no 2011/50317-5). Eduardo Siegle and Belmiro Mendes Castro are sponsored by CNPq research fellowships. We also thank the two anonymous reviewers for their comments that substantially improved the manuscript.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Marcelo Dottori
    • 1
  • Eduardo Siegle
    • 1
  • Belmiro Mendes Castro
    • 1
  1. 1.Oceanographic InstituteUniversity of São PauloSão PauloBrazil

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