The performance of the CPTEC Global Model in simulating the modal energetics for a composite of seven South Atlantic Convergence Zone (SACZ) episodes was evaluated, emphasizing the influence of the model resolution and the three different deep convection parameterizations: Kuo, Relaxed Arakawa-Schubert (RAS) and Grell on the vertical energy partition between external and internal modes and on the energy interactions within and between various horizontal oscillation modes: Rossby, Kelvin, Mixed Rossby-Gravity and West and East Gravity. The results showed that the model predictions using the Kuo, RAS and Grell deep convection schemes were similar with each other, and had a good agreement with the patterns obtained in the observational part (Part I of this paper). The use of different deep convection schemes did not present significant impact in the partition and interaction of energy between vertical and horizontal modes. A greater impact was obtained when increasing the vertical resolution of the analyses and the model from 28 to 42 levels. A greater number of internal modes show a relevant role in the horizontal and vertical energy exchanges, in terms of representing the observed characteristics.
Energetics; normal mode functions; South Atlantic Convergence Zone (SACZ); Atmospheric General Circulation
