Variabilidade da velocidade do vento a 10 metros para a região Nordeste do Brasil.

Abstract

This paper made a wind speed variability of the study at 10 meters to the Northeast region of Brazil using reanalysis data of the European Centre for Medium-Range Weather Forecasts (ECMWF). In this first analysis these data were compared with values observed in weather stations belonging to the National Institute of Meteorology (INMET) to evaluate the quality. The results showed a good performance presenting good statistics. For the evaluation of seasonal and interannual variation diagrams were constructed with longer data series (1979-2015). They observed marked variations between seasons, more specifically between autumn and spring. It is also observed variations between years of La Niña activity, El Niño and positive and negative gradients of the anomaly temperature of the sea surface in the tropical Atlantic. The spatial distribution of wind speed anomalies, for years of experience of these phenomena, proved to be consistent with issues discussed in the literature.