Comparison and Verification of Coherent Doppler Wind Lidar and Radiosonde Data in the Beijing Urban Area  

作　　者：Zexu LUO Xiaoquan SONG Jiaping YIN Zhichao BU Yubao CHEN Yongtao YU Zhenlu ZHANG 

机构地区：[1]College of Marine Technology,Faculty of Information Science and Engineering,Ocean University of China,Qingdao 266100,China [2]Laboratory for Regional Oceanography and Numerical Modeling,Laoshan Laboratory,Qingdao 266237,China [3]Qingdao Leice Transient Technology Co.LTD,Qingdao 266100,China [4]CMA Meteorological Observation Centre,Beijing 100081,China [5]Beijing Municipal Meteorological Observation Center,Beijing 102600,China [6]Qingdao Meteorological Comprehensive Support Center,Qingdao 266003,China

出　　处：《Advances in Atmospheric Sciences》2024年第11期2203-2214,共12页大气科学进展（英文版）

基　　金：financially supported by the National Key R&D Program of China (2022YFC3700400&2022YFB3901700)。

摘　　要：As a new type of wind field detection equipment, coherent Doppler wind lidar(CDWL) still needs more relevant observation experiments to compare and verify whether it can achieve the accuracy and precision of traditional observation equipment in urban areas. In this experiment, a self-developed CDWL provided four months of observations in the southern Beijing area. After the data acquisition time and height match, the wind profile data obtained based on a Doppler beam swinging(DBS) five-beam inversion algorithm were compared with radiosonde data released from the same location. The standard deviation(SD) of wind speed is 0.8 m s^(–1), and the coefficient of determination R~2 is 0.95. The SD of the wind direction is 17.7° with an R~2 of 0.96. Below the height of the roughness sublayer(about 400 m), the error in wind speed and wind direction is significantly greater than the error above the height of the boundary layer(about 1500 m). For the case of wind speeds less than 4 m s^(–1), the error of wind direction is more significant and is affected by the distribution of surrounding buildings. Averaging at different height levels using suitable time windows can effectively reduce the effects of turbulence and thus reduce the error caused by the different measurement methods of the two devices.

关 键 词：coherent Doppler wind lidar RADIOSONDE wind measurement urban boundary layer 

分 类 号：P407.5[天文地球—大气科学及气象学]