利用AMDAR数据分析厦门、泉州双雷达三维风场反演误差
投稿时间:2019-04-01  修订日期:2019-08-21  点此下载全文
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张晗昀 厦门市气象台 605895627@qq.com 
中文摘要:本文利用2016年全年进出厦门机场和晋江机场航班的AMDAR数据对双雷达反演风场进行检验,分析了厦门、泉州双雷达风场反演的总体误差,研究结果表明:(1)本文验证了双雷达连线附近区域反演风场的平均绝对误差较大,发现了与两部雷达连线的夹角小于15度和大于165度的区域的反演结果的平均绝对误差明显大于误差的年平均值。(2)对于反演风向而言,误差随着高度增加误差减小。对于反演风速而言,在9km以下误差均在5m/s左右,而9km以上高度反演误差较小。(3)剔除了双雷达连线附近区域(与两部雷达连线的夹角小于15度和大于165度的区域)和反射率因子小于5dBZ以及等于100dBZ(剔除非气象回波)的反演结果后,双雷达反演风场误差较小,相对于AMDAR数据的风向年平均绝对误差为29.4°,风速年平均绝对误差为3.28m/s,总体误差在可接受范围之内,反演结果接近“真值”,该反演方法稳定可靠。
中文关键词:双多普勒雷达、风场反演、AMDAR、误差分析
 
Error analysis of the three-dimensional wind field retrieval from Xiamen-Quanzhou radars by using AMDAR data
Abstract:This paper uses the Aircraft Meteorological Data Relay (AMDAR) data of flights from Xiamen and Jinjiang Airport in 2016 to test the wind field retrieval from dual-Doppler radars, and analyzes the total error of the wind field retrieved from Xiamen and Quanzhou Doppler radars. The results indicate that: (1)The mean absolute error of the wind field retrieval in the vicinity of the dual-Doppler radars connection is apparent. The mean absolute error of the retrieval result in the regionwhere the angle between the two radars is less than 15 degrees and greater than 165 degrees is significantly higher than the annual average value. (2) The wind direction field retrieval error decreases with increasing height. And for wind speed field retrieval, the error below 9km is about 5m/s, while above 9kmis small. (3) After eliminating the retrieval results in the area near the dual radar connection (the angle between the two radar connection is less than 15 degrees and greater than 165 degrees) and the reflectivity factor less than 5dBZ and equal to 100dBZ(Non-meteorological echo), the error of wind field retrieved by dual-Doppler radars is more insignificant, the annual mean absolute error of the wind direction relative to the AMDAR data is 29.4°, while for wind speed is 3.28m/s. Overall, the error is acceptable the retrieval results are closing to the “true value”,and the wind retrieval method is stable and reliable.
keywords:Dual-Doppler radars, Wind field retrieval, AMDAR, Error analysis
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