Windregime

Wind regime is the characteristic pattern of wind observed at a location over a specified period. It encompasses average wind speed, prevailing wind directions, and the variability of wind from hour to hour, day to day, and season to season. A wind regime can be described for a single site or for a larger region, and it includes diurnal and seasonal cycles as well as rare but impactful gusts.

Characterization relies on meteorological observations from stations, tall towers, or remote sensing, with wind speed distributions often summarized by statistics such as mean wind speed, gust factors, and the Weibull distribution parameters. Wind roses visualize directionality; turbulence intensity and wind shear describe vertical changes in speed. Data quality, length, and representativeness are critical for robust regime estimates.

Wind regimes are shaped by geography and atmospheric dynamics, including terrain roughness, elevation, coastlines, land-sea orographic effects, and urban development. Regional circulation patterns, such as sea breezes, monsoon systems, or jet streams, imprint seasonal and spatial structure on the regime. Climate variability and change can shift the regime, altering mean speeds, directions, and extremes.

Knowledge of wind regime supports wind energy development, building design, aviation planning, and environmental assessments. It informs site selection, energy yield modelling, and reliability estimates, as well as hazard analysis for extreme winds. More broadly, it contributes to understanding regional climate behavior and how wind patterns respond to changing atmospheric conditions.