Analysis for Precipitation Climate Prediction on South of Brazil

Abstract

An evaluation for the precipitation climatology for the Rio Grande do Sul state (Brazil) is performed. The BRAMS code is feeded with boundary conditions from the CPTEC-INPE global circulation model (GCM). The simulated precipitation for this region in Brazil presented a climate standard diferent from the observations. An spectral analysis on the wind was carried out to explain the desagreement.Resumo: Uma avaliação para a climatologia de precipitação para o estado do Rio Grande do Sul (Brasil) é realizada. As condições de contorno para o código BRAMS são providas pelo modelo de circulação global do CPTEC. Precipitação simulada difere das observações. Uma análise espectral das componentes do vento é empregada para explicar a discrepância registrada.

An objective criterion for determining the South Atlantic Convergence Zone

“…However, as numerical models do not always represent well the intra-seasonal variability, and as a consequence, systems such as SACZ (Ferraz et al, 2013), principal component analysis (PCA) was used in order to determine the mode more similar to SACZ and then the selection criterion was redefined based in the data rebuilt from the PCA series.…”