不同季节天气条件下风廓线雷达测风精度分析  

Analysis on Precision of Wind Profiler Measurements in Different Seasonal Weather Conditions

作　　者：涂治招[1,2] 汪学渊 江彩英[4] 孙麒龙 肖励 Tu Zhizhao;Wang Xueyuan;Jiang Caiying;Sun Qilong;Xiao Li(Jian’ou Meteorological Office,Jian’ou 353000,China;Fujian Key Laboratory of Severe Weather,Fuzhou 350000,China;Fujian Atmospheric Observation Technical Support Center,Fuzhou 350001,China;Nanping Meteorological Office,Nanping 353000,China)

机构地区：[1]建瓯市气象局,福建建瓯353000 [2]福建省灾害天气重点实验室,福州350000 [3]福建省大气探测技术保障中心,福州350001 [4]南平市气象局,福建南平353000

出　　处：《气象与环境科学》2020年第2期100-108,共9页Meteorological and Environmental Sciences

基　　金：福建省气象局青年专项(2015q05)。

摘　　要：采用建瓯风廓线雷达(CFL-06)观测资料,分析不同季节天气条件下风廓线雷达的测风精度,同时还选取了永安风廓线雷达(CFL-03)数据进行了对比分析。结果表明,四个季节在探测高度低于4 km时,获得的对称波束水平风分量差值的平均值很小,且小于0.5 m·s^-1,标准差值也比较一致,且小于10 m·s^-1,探测精度均较好。当探测高度超过4 km后,春、冬两季对称波束水平风分量差值的平均值和标准差值开始增大,在7.1 km高度平均值和标准差值达到最大,分别为9 m·s^-1和28 m·s^-1,夏、秋两季探测精度高于春、冬两季的。在探测高度低于4 km时,不同季节4种方法计算的垂直速度基本一致,以春季大气最为均匀,其次是冬季的,夏、秋两季的最差。在探测高度超过5 km后,春、冬两季4种方法计算的垂直速度偏差增加较快,最大分别为0.9 m·s^-1和1.0 m·s^-1,夏季4种方法计算的垂直速度偏差较小。夏、冬季水平风向和风速测量精度优于春、秋两季的,秋季测量精度最低,水平风速标准差值在0.0~1.5 m·s^-1和水平风向标准差值在0~15°范围内所占比例分别只有51.6%和54.0%。总的来说,风向和风速测量精度普遍不高,需要进一步改进算法,减少计算误差,提高探测性能。By analyzing the observation data of the CFL-06 wind profiler in Jian’ou,this paper carries out the research of the wind measurement precision under the weather conditions of four seasons,and,at the same time,selects the data of the CFL-03 wind profiler in Yong’an for comparative analysis.The results show that,when the detection height is below 4 km,the mean value of the horizontal wind component difference of the symmetric beams in four seasons is very small,less than 0.5 m·s^-1,and the standard deviations are also consistent,less than 10 m·s^-1,indicating good detection accuracy.However,when the detection height exceeds 4 km,the mean value and standard deviation value of the horizontal wind component difference of symmetric beams in spring and winter start to increase and reach maximum values of 9 m·s^-1 and 28 m·s^-1 respectively at the height of 7.1 km.For another,the detection precision in summer and autumn is higher than that in spring and winter.When the detection height is below 4 km,the vertical velocity calculated by four methods in different seasons is basically consistent,with the most uniform atmosphere in spring,followed by winter,and the worst in summer and autumn.However,the deviation of vertical velocity calculated by the four methods in spring and winter increases rapidly after the detection height exceeds 5 km,and the maximum values are 0.9 m·s^-1 and 1.0 m·s^-1 respectively.The deviation of vertical velocity calculated by the four methods in summer is small.The measurement precision of horizontal wind direction and wind speed in summer and winter is better than that in spring and autumn.The prediction precision in autumn is the lowest,with standard deviation of horizontal wind speed in the range of(0.01.5 m·s^-1)and standard deviation of the horizontal wind direction in the range of(015°),accounting for only 51.6%and 54.0%,respectively.In general,for the poor measurement accuracy of wind direction and wind speed,the algorithm should be improved to reduce calculating errors and impr

关 键 词：风廓线雷达 季节 测风 精度 

分 类 号：TN959.4[电子电信—信号与信息处理] P414.7[电子电信—信息与通信工程]