摘要
利用2016年6—8月沈阳地区TWP8-L型风廓线雷达观测资料,判断大气的均匀性,计算风廓线雷达的探测精度,并与探空气球的观测资料进行对比分析,得到晴空和不同降水条件下的风廓线雷达探测精度随高度的变化情况。研究结果表明,1000m高度以下风廓线雷达的探测精度较高。在无降水和均匀降水条件下,风廓线雷达的水平探测范围内大气均匀稳定,东西波束和南北波束测得的径向风对称性较好,(U_W-U_E)和(V_S-V_N)的平均差和标准差值较小;与GTS1型探空仪风速精度相差小于2.9m/s,两者相关性较好,风廓线雷达探测水平风的准确性较高。在探测范围不均匀的降水条件下,大气在风廓线雷达的水平探测范围内不均匀,东西波束和南北波束测得的径向风的对称性较差,垂直速度变化差异较大;U_W-U_E和V_S-V_N平均差和标准差值较大;与GTS1型探空仪风速精度相差大于2.0m/s,两者相关性较差,风廓线雷达探测水平风的准确性较低,需要进一步改进算法,改善数据质量,提高探测性能。
Based on the data of the TWP8-L wind profiler in Shenyang,the uniformity of the atmosphere and the detection accuracy of the wind profile radar are estimated.Meanwhile,the observational data of radiosondes are also compared to get the situation that the detection accuracy of wind profiler varies with height in clear day and different precipitation conditions.The results show that the detection accuracy of the wind profile radar is relatively high below 1000 m.In a clear day and the detection range in the uniform precipitation condition,wind profilers have a higher detection accuracy in horizontal winds because the atmosphere is uniform and steady,and the symmetry of the east-west and south-north radial winds is better,the average deviations of U_W-U_E and V_S-VN and the standard deviation are small.The wind speed accuracy of GTS1 is less than 2.9 m/s,with the correlation being better,and the wind profiler also has higher detection accuracy in horizontal winds.In the precipitation condition with a no-uniform detection range,the symmetry of the east-west and south-north radial wind is poor,and the vertical velocity varies greatly;the average deviations of U_W-U_E and V_S-V_N and the standard deviation are big,and the wind speed accuracy of GTS1 is more than 2.0 m/s with the correlation being poor;the wind profiler also has a low detection accuracy in horizontal winds,so the algorithm should be amended to improve data quality and detection performance.
出处
《气象科技》
2018年第1期16-28,共13页
Meteorological Science and Technology
关键词
风廓线雷达
水平风
精度对比
wind profiler
horizontal wind
precision comparison
