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Two micrometeorological towers located in the experimental site of Pedras Altas in the region of Pampa Gaucho were separated by a distance of about 500 m from each other, enabling a small scale horizontal variability, due to the complexity of the terrain. Such variability favors distinct contributions in the modes of flow. This work points out a relation between classes of maximum wind measured in the station of the top of the hill with obstructions provoked by the heterogeneity of the terrain. Through a spectral analysis it was possible to find encouraging results for future work, as the study shows a pertinent relation between non-turbulent low frequency motions with surface heterogeneity and how this implies in the horizontal and vertical turbulent velocity.

A influência da complexidade da superfície terrestre no fluxo através de uma análise espectral de quantidades turbulentas na camada de limite estável