程志刚,李炬,张鑫宇,张京江,窦军霞,程月星. 2020. 基于三台测风雷达的大气湍流和三维风场研究[J]. 气象学报, (0):-, doi:10.11676/qxxb2020.070
基于三台测风雷达的大气湍流和三维风场研究
Researches on turbulence and three-dimensional wind field based on three wind lidars
投稿时间:2019-11-21  修订日期:2020-06-01
DOI:10.11676/qxxb2020.070
中文关键词:  测风激光雷达  协同观测  虚拟铁塔  大气湍流  三维风场
英文关键词:wind lidar, cooperative observation, virtual tower stares, atmospheric turbulence, three-dimensional wind field
基金项目:国家重点研发计划“2018YFF0300101”,国家重点研发计划“2017YFC0209604”,北京市气象局科技项目BMBKJ201701002
作者单位E-mail
程志刚 北京城市气象研究院 zgcheng@ium.cn 
李炬 北京城市气象研究院 jli@ium.cn 
张鑫宇 北京城市气象研究院 xyzhang@ium.cn 
张京江 北京城市气象研究院 jjzhang@ium.cn 
窦军霞 北京城市气象研究院 jxdou@ium.cn 
程月星 北京市朝阳区气象局 595115014@qq.com 
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中文摘要:
      本文基于三台同型号的测风激光雷达,利用‘虚拟铁塔’协同观测技术开展大气湍流探测,与铁塔搭载的三维超声风速仪观测结果相比:其风速的相关系数高达0.95,平均误差为1.25m/s,均方根误差为1.39m/s;大气湍流强度TKE的相关系数高达0.98,平均误差为0.09m2/s2,均方根误差为0.24m2/s2,并且协同观测的高频风速与三维超声风速仪具有相同的频谱结构。本文还利用扫描协同观测技术开展三维风场探测,与铁塔搭载的常规测风设备相比,其90m高度处的水平风速和水平风向的相关系数分别为0.89和0.94,平均误差为-0.82m/s和-1°,均方根误差为1.00m/s和30°。相比于单台测风激光雷达,基于三台测风激光雷达协同观测技术具有一定的优势:不需要风场水平均匀的假设、探测精度更高等。但其对观测环境的要求更高:观测路径上不能有遮挡、观测协同性等。在科研业务应用中,需要根据实际的观测需求,合理制定观测方案。
英文摘要:
      Turbulence is detected based on ‘virtual tower stares’ cooperative observation technology (VTS) using three wind lidars in this paper. Compared with observations of the three-dimensional ultrasonic anemometer (sonic) carried by meteorological tower, the results of VTS are good. The correlation coefficient, average error (BIAS), root mean square error (RMSE) of wind speed with 10Hz frequency at 32m between VTS and sonic are 0.95, 1.25m/s, 1.39m/s. For the atmospheric turbulent kinetic energy (TKE), the correlation coefficient, BIAS, RMSE are 0.98, 0.09m2/s2, 0.24m2/s2. And the wind speed observed by VTS has the same spectral structure as the sonic. Except for turbulence, the three-dimensional wind field detection is also carried out by using the scan cooperative observation technology (scan) based on three wind lidars. The observations of scan correspond well with the conventional wind anemometer equipped at the meteorology tower. The correlation coefficient, BIAS, RMSE of horizontal wind speed and direction with 10-min average at 90m are 0.89 and 0.94, -0.82m/s and -1°, 1.00m/s and 30°. Compared with a single wind lidar, the cooperative observation using three wind lidars has certain advantages. There is no assumption of uniform of wind, higher observation accuracy, and so on. However, the requirements of cooperative observation for the observational environment are higher. There should be no block on the beam of three wind lidars, observational synergy, etc. In the applications, it is necessary to make a reasonable observational plan based on the actual observational needs.
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