Applicability of wind products retrieved from wind lidar in the winter games

Abstract

Abstract Based on the 10-min average wind speed and wind direction data observed by automatic stations at the starting point and midway of the snow track in the “14th National Winter Games”, the wind product accuracy of wind lidar from December 1, 2019 to January 31, 2020 was analyzed. The results show that the mean relative deviation (MRD), standard deviation of relative deviation (STDRD ) and correlation coefficient (R) of wind direction data are better than wind speed data. The MRD is largest when the average wind speed of the ground observation is about 3 m/s, reaching 55%. The wind speed retrieved by the lidar is higher than that observed by automatic station when the average wind speed is lower than 10 m/s. When the average wind speed is higher than 10 m/s, the wind speed retrieved by the lidar is lower than ground observations. The detection accuracy of the lidar wind direction at the automatic station No.4 is better than that at the automatic station No.3. For the detection of wind speed, the mean absolute error (MAE) is larger, the R was slightly lower, but the mean error (ME), the MRD and the STDRD are better at the automatic station No.4. As the SNR increases, ME of the average wind speed decreases, and the relative deviations (RD) of wind speed and wind direction gradually concentrate on zero.