Utilização de imagens orbitais de radiação de onda longa para identificação da Zona de Convergência do Atlântico Sul

Abstract:

The South Atlantic Convergence Zone (SACZ) directly influence the pluviometric indices in the Amazon, midwest and southeast regions of Brasil, supporting economical activities like agriculture and energy production by hydroelectric. When anomalous conditions affect the SACZ formation, it can be responsible for natural disasters like floods and landslides, as well as drought conditions. For these reasons it is extremely important understand and pbkp_redict this meteorological system. In this sense, the present work intends to use outgoing longwave radiation orbital images as an indicative of the presence of the SACZ. An classification algorithm was developed and the results show that the agreement with the observational database is about 56%. Also, the average atmospheric fields reveals that, preferably, more intense cases are detected by the algorithm. Classification errors occur in both methodologies, subjective and objective, with can mask the results. For future studies it is suggested that dynamic and/or thermodynamic variables are inserted in the algorithm.

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