Surface turbulence intensity as a predictor of extrapolated wind resource to the turbine hub height

Good scores were returned both in wind speed and power density extrapolations, with biases within 7 and 8%, respectively. Wind speed extrapolation was better predicted 10-40 m (NRMSE = 0.16, r = 0.95) than 10-80 and 20-80 m (NRMSE = 0.20-0.24, r = 0.86-0.91), while for power density even finer scores than wind speed were achieved (r = 0.98 at 40 m, and r = 0.96 at 80 m). Method's skills were also assessed in predicting wind energy yield. Application over sites with different terrain features and stability conditions is expected to provide further insight into its application field.