| Autor: |
Mendonça, Luis Felipe F., Fetter-Filho, Antônio F. H., Andrade, Mauro M., Oliveira, Fabricio S. C., Lindemann, Douglas S., Freitas, Rose Ane P., Lentini, Carlos. A. D. |
| Předmět: |
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| Zdroj: |
Ocean Science Discussions; 3/24/2021, p1-30, 30p |
| Abstrakt: |
The Southern Brazilian Continental Shelf (SBCS) is an area with great ecological and economic importance to Brazil. In this region can be observed the recurrent passage of frontal systems and extratropical cyclones, which are more frequent during the winter months of the southern hemisphere. These systems act on the ocean surface layers as direct driving forces, which may change the thermohaline structure of the water column and induce sea level perturbations. This study used the coupled ocean atmosphere regional model (COAWST) to evaluate the effect of the passage of a frontal system associated with an extra-tropical cyclone. The ocean and atmosphere models (ROMS and WRF) was configured with two nested grids, in order to solve the dynamic processes, at different scales, that comprise the energy transfer from the atmospheric system to the ocean. The simulation was based on a study case, occurred in September 2016, on the southwestern brazilian continental shelf. The model outputs were analyzed/compared to remote sensing data and 5 tide gauges from the Agricultural Research and Rural Extension (EPAGRI) in Santa Catarina state, Brazil. This comparison showed a correlation higher than 78% between sea level rise data and the model results, with average difference of less than 25cm. The use of low-pass Lanczos-Cosine filter made it possible to identify the meteorological component in the ocean model outputs. Our simulation also presents the sea level anomalies, associated with the crossing of the atmospheric frontal system, progressing to northward along the continental shelf at 480km.day-1, probably associated with the presence of a coastal-trapped wave. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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