From regional to local scale modelling on the south-eastern Brazilian shelf: case study of Paranaguá estuarine system

  • Guilherme Augusto Stefanelo Franz Universidade de Lisboa; Instituto Superior Técnico; MARETEC
  • Paulo Leitão HIDROMOD
  • Aires dos Santos Universidade de Lisboa; Instituto Superior Técnico; MARETEC
  • Manuela Juliano Universidade dos Açores; LAMTec
  • Ramiro Neves Universidade de Lisboa; Instituto Superior Técnico; MARETEC
Keywords: Numerical modelling, Tidal propagation, Resonance phenomenon, Downscaling, South-eastern Brazilian shelf, Paranaguá estuarine system

Abstract

The applicability of a numerical model following a downscaling methodology was evaluated for the south-eastern Brazilian shelf (regional model) and Paranaguá estuarine system (local model). This approach permits the simulation of different scale processes, such as storm surges and coastal upwelling, and is suitable for operational forecasting purposes. When large areas are covered by regional models, the tidal propagation inside the domain can be significantly affected by the local tidal potential, mainly where the resonance phenomenon is observed. The south-eastern Brazilian shelf is known for the resonance of the third-diurnal principal lunar tidal constituent (M3), the largest amplitudes being found in the Paranaguá estuarine system. Therefore, the significance of the local tidal potential was assessed in this study for the most important tidal constituents inside the estuarine system (including M3). The model validation was performed with tidal gauge data, Argo float profiles and satellite measurements of Sea Surface Temperature. The methodology described in this study can be replicated for other important estuarine systems located on the south-eastern Brazilian shelf. Furthermore, the numerical model was developed within a perspective of operational nowcast/forecast simulations, useful for several activities such as navigation and response to emergencies (e.g., oil spills).

Downloads

Download data is not yet available.
Published
2016-09-01
How to Cite
Franz, G., Leitão, P., Santos, A., Juliano, M., & Neves, R. (2016). From regional to local scale modelling on the south-eastern Brazilian shelf: case study of Paranaguá estuarine system. Brazilian Journal of Oceanography, 64(3), 277-294. https://doi.org/10.1590/S1679-875920161195806403
Section
Original Article