Doppler Wind Lidar Applicability Research in Western Yellow Sea Coastal Zone Based on Radiosonde
In this article,we use Doppler wind lidar and L-band radiosonde system installed at Qingdao National Basic Meteorological Observing Station in the coastal zone of the western Yellow Sea from April 2021 to December 2022.Through time and space matching of the observed data,the detection capabilities of the Doppler wind lidar for detection height,horizontal wind speed,and horizontal wind direction are compared and analyzed with the data measured by the L-band radiosonde system as the reference standard.The results show that the daily variation characteristics of the maximum detection height are consistent with the daily variation of the boundary layer height.The lowest detection height is about 1000 m at 09:00(Beijing Time)each day,and the peak of detection height reaches about 1300 m at 17:00.Among the total of 1768 jointly observed moments that were selected,more than 90%of the maximum observation heights of Doppler wind lidar are below 2 000 m,and the moments with heights below 500 m account for about 16%.The linear fitting effect of the horizontal wind speed and direction is better,with correlation coefficients of 0.97 and 0.98 respectively.There is a slight difference in their detection capabilities during sea breeze and land breeze periods.The horizontal wind speed error varies with height and wind speed.Below 500 m,the wind speed observed by the wind lidar is significantly higher than that of the L-band sounding system,while between 500 and 1500 m,the two are closer.The wind speed error distribution is relatively concentrated at and below force 4 wind.For force 5 to 7 wind,the statistical dispersion of wind speed error is the largest and the discrete value is the most.Above force 8 wind,the dispersion error significantly reduces.There is good consistency in the trend of horizontal wind direction changes between two measurements.The wind direction error of Doppler wind lidar is mainly positive,that is,compared with the clockwise deflection of L-band radiosonde.At the lower level,the wind direction is mainly northerly and southerly.The frequency of Doppler wind lidar is lower than that of L-band radiosonde in NW,NNW,S and SSE directions,and higher in N,NNE,SSW and SW directions.At the upper level,the wind begins to shift to the west and the frequency of Doppler wind lidar is higher than that of L-band radiosonde in W direction,obviously.
western Yellow Sea costal zoneDoppler wind lidarL-band radiosonde systemlow altitude wind field
NETL
NSTL
万方数据
