Radiação solar global mensal para o Estado de Alagoas - Mapeamento

Abstract

This paper show a study on the spatial variability of global solar radiation monthly in the state of Alagoas, estimated as a function of the air temperature and atmospheric pressure. Was used the model proposed by Allen (1997) with the coefficients in the literature and the work of Nicácio (2002), since the latter was parametrized to the area of study. The aim of this study was to verify which of parameterizations was better adjusted to the conditions of local thermal amplitude. The Allen model (1997) was adopted, for not exist a dense network of measures solar brightness, as opposed to the measures of air temperature, which are found more easily. In the first analysis, it was checked that the Allen model (1997) modified by Nicácio (2002), did’t show good agreement for points of the regions of the Zona da Mata, Agreste and Sertão Alagoano and may well only be applied to the region of Litoral. Before this first result was used Allen model (1997) contained in the literature for these regions. After obtaining the result of the best model for each region, maps were developed for global solar radiation, conducting studies of the spatial variability and applying techniques geoestatísticas for interpolation, thus creating a Solarimetric Atlas of the State.