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Optoelectronics 2021
基于相干测风激光雷达的城区四月份低空风场观测研究
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Abstract:
为了研究北京地区大气边界层的风场特性，利用相干测风激光雷达在北京市朝阳区开展连续观测试验。激光雷达全天时无人值守工作，以VAD扫描方式获取探测区域内的水平风场、垂直风场等数据。对观测数据进行分析，可以发现：激光雷达在沙尘天气下可以获得海拔2500 m范围的风场数据，在阴雨天气下仅可获得海拔1000 m范围的风场数据。四月下旬期间，海拔2000 m处的最大风速可达到8.7 m/s，垂直风速在0~2 m/s范围内。
In order to study the characteristics of the wind field in the atmospheric boundary layer in Beijing, a continuous observation experiment was carried out in the Chaoyang District of Beijing using coherent wind lidar. Lidar works unattended throughout the day, and uses VAD scanning to obtain data such as horizontal wind field and vertical wind field in the detection area. Analyzing the observation data, it can be found that the lidar can obtain wind field data at an altitude of 2500 m in sandy and dusty weather, and only obtain wind field data at an altitude of 1000 m in rainy weather. During late April, the maximum wind speed at 2000 m above sea level can reach 8.7 m/s, and the vertical wind speed is in the range of 0~2 m/s.
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