Name: Fernando Túlio Camilo Barreto
Type: MSc dissertation
Publication date: 24/02/2014
Advisor:
Name |
Role |
|---|---|
| Julio Tomás Aquije Chacaltana | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| Edmilson Costa Teixeira | Internal Examiner * |
| Julio Tomás Aquije Chacaltana | Advisor * |
| Valdir Innocentini | External Examiner * |
Summary: The shear resulting from the interacti on between the Brazil Current (BC) and North Brazil Under Current (NBUC) is o ne of the main factors responsible for important features found off the coast of the Espírito Santo
(ES)-Brazil, as eddies and meandering. Nevertheless, there are few studies showing the influence of BC/NBUC system in me
soscale dynamics of this region, which is of crucial
importance to the country due to its oil potential. In this work sensitivity experiments were performed using the Delft3D model
, which were varied the speed of the CB and NBUC, in order to study the flow field response to this variation, and thus contribute in understanding the mesoscale dynamics of ES adjacent oceanic region. For this,velocity cross-sections, the intrusion of cold water,
the Tubarão Eddy (TE), and the Cyclonic Tubarão Eddy (CTE), were analyzed.The results showed that the variation
of the current velocity induced a change in the vertical extension of the currents and a longitudinal translation of the ircores, this being responsible for the variation of the cold water intrusion on the she
lf observed in the experiments. Rearding the eddies,
was found a dominance in the TE dynamics by the BC, while
changes in the speed of both the CB as the
NBUC induced significant changes in CTE. This difference
between TE and CTE are probably related to differences in the
vertical extension of the two vortices. While thesign of TE was identified only in the BC, the CTE was identified in BC and NBUC. At the end of the work it was concluded that the variations
of the current velocity were not able to modify the mesoscale
scenario in the region, as occurred in Soutelino et al.
(2013) for their sensitivity experiments.
