气溶胶激光雷达系统研制及在大气监测中应用

Development and application of aerosol lidar system in atmospheric monitoring

激光雷达是探究大气气溶胶的重要手段。为了响应国家治理大气的号召,研制了一套激光雷达系统,包括激光的收发、光电转换、数据采集以及配套的控制软件。采用先进的Fernald反演算法,通过固定垂直、移动走航、平面扫描3种监测模式对大气进行监测。针对不同的管控需求和污染状况,选择与之匹配的监测模式。结合时空演化图、风向风速等条件对典型污染案例进行系统分析。通过现场取证对比,验证了激光雷达系统的可靠性。结果表明,该系统能够实时精确地捕获大气气溶胶分布与传输情况,可以广泛应用到大气环境监测,为治理大气污染提供科技支撑。

Lidar is a crucial method to explore atmospheric aerosol. In response to the country′s call to govern the atmosphere, a set of lidar systems were developed, including laser receiving and sending, photoelectric conversion, data acquisition, and supporting control software. The advanced Fernald inversion algorithm monitors the atmosphere through three monitoring modes, fixed vertical, mobile navigation, and plane scanning. According to different control requirements and pollution conditions, the monitoring mode matching with it is selected. The typical pollution cases are systematically analyzed in combination with the time-space evolution diagram, wind direction, and wind speed, and other conditions. Through on-site forensic comparison, the reliability of the lidar system is verified. The results show that the system can accurately capture the distribution and transmission of atmospheric aerosols in real-time. It can be widely used in atmospheric environment monitoring and provide technical support for air pollution control.