Journal of Arid Meteorology ›› 2021, Vol. 39 ›› Issue (3): 514-523.
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REN Yong1,2,3, CHEN Sai4, YU Anan3, FAN Mengqi5
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任雍1,2,3,陈赛4,余安安3,范梦奇5
Abstract: The wind speed, wind direction and boundary layer height retrieved by using the gradient method were compared and analyzed based on the radiosonde data of national upperair meteorological station in Xiamen from 5 November to 13 December 2019 and the Doppler wind lidar data deployed in the same period. The results are as follows: (1) The determination coefficients R2 of wind speed and wind direction reached 0.91 and 0.98, respectively, showing good consistency. The contrast effects were the best within the height range from 450 to 1300 m; (2) The temperature profile of the radiosonde data and the radar echo intensity signal of the wind lidar were used to retrieve the boundary layer height by using gradient method respectively. The consistency between the former and the latter was high, but when there were complicated conditions such as jet streams, clouds and obvious pollution in the boundary layer, the retrieval result of radiosonde data would be significantly greater than that of wind lidar; (3) In the case of rainfall, the lidar detection height was significantly reduced and the boundary layer height couldn’t be inverted effectively. The wind lidar can not only meet the refined continuous detection of wind field in the boundary layer, but also retrieve the boundary layer height.
Key words: radiosonde, coherent Doppler wind lidar, boundary layer height, gradient method
摘要: 利用2019年11月5日至12月13日厦门国家高空气象观测站的无线电探空仪数据和同期布设的多普勒测风激光雷达资料,对比分析二者的风速风向和通过梯度法反演的边界层高度。结果表明:(1)风速和风向的决定系数R2分别达到0.91和0.98,一致性良好,450~1300 m高度范围内,对比效果最佳;(2)利用探空数据的温度廓线和测风激光雷达的雷达回波强度信号通过梯度法分别反演边界层高度,二者一致性很高,只是在边界层出现急流、云层和明显的污染等复杂情况时,探空数据反演的结果会明显大于测风激光雷达;(3)在出现降雨时,雷达探测高度明显降低,无法有效反演边界层高度。测风激光雷达不仅可以满足边界层内风场的精细化连续探测,也可以反演边界层高度。
关键词: 无线电探空仪, 相干多普勒测风激光雷达, 边界层高度, 梯度法
REN Yong, CHEN Sai, YU Anan, FAN Mengqi. Reliability Analysis of Wind Field and Boundary Layer Height in Xiamen Retrieved by Coherent Doppler Wind Lidar[J]. Journal of Arid Meteorology, 2021, 39(3): 514-523.
任雍, 陈赛, 余安安, 范梦奇. 相干多普勒测风激光雷达反演厦门市风场及边界层高度的可靠性分析[J]. 干旱气象, 2021, 39(3): 514-523.
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