Variabilidade do vento à superfície em mesorregiões da Bahia: uma análise com plataformas automáticas de coleta de dados.

Abstract

The objective of this work was to determine patterns of temporal variability of the surface wind in mesoregions of the state of Bahia. Multivariate analysis (main component analysis and cluster analysis) applied to quarterly averages of the surface wind components recorded by five automatic data collection platforms operated by the Institute of Water and Climate Management (INGÁ) were used. The first two components of the zonal component of the wind explained 99.4% of the total variance of the quarterly averages, while the first two components of the southern component accounted for 99.6%. The clustering analysis applied to the most significant temporal common factors using the Ward method and Euclidean distance resulted in three homogeneous groups for each component of the wind, of which two are built by one station only. These groups are characterized by higher wind speeds, a result that suggests the importance of local factors such as relief aspect.