Zona de convergência do Atlântico Sul: um estudo observacional e numérico.

Abstract

The main objective of this study was to analyze the occurrence of systems Convergence Zone of the South Atlantic - SACZ, with the purpose to observe their behavior and interaction with the interannual scale. Were selected two SACZ events: from 02 to 06 December 2009 (during the El Niño) and 27 to 31 December 2010 (during the La Niña). For a large scale analysis, were selected three main areas of activity systems with the aim of perceive variations over time for certain variables. Comparisons were made between the reanalysis data of NCEP / NCAR with the data observed at meteorological stations available INMET. The analysis shows consistency on a large scale for both cases and the variables show differences which confirm the presence of the SACZ system on three regions analyzed. The Mesoscale analysis reveals important dynamic variations related to SACZ in both cases. All variables show coherence and BRAMS could simulate well the main area of activity of the SACZ, both for the case of El Niño (2009) as to the case of La Niña (2010).