气溶胶激光雷达在大气环境监测中的应用

Application of aerosol lidar in atmospheric environment monitoring

文章基于不同城市环境空气质量变化特征分析,对气溶胶激光雷达在大气边界层高度测定、重污染天气、烟花爆竹燃放和沙尘天气高空中气溶胶粒子特性及垂直时空演变等应用结果进行了分析。结果表明,气溶胶激光雷达能进行垂直/走航扫描、水平扫描、剖面扫描和锥形扫描,对垂直高空大气分析效果较好,消光系数、退偏振比能较好的表征其粒子特性。另外,激光雷达走航车可随时移动监测,在颗粒物污染溯源方面优势显著,但气溶胶激光雷达分析结果较为单一,为了更准确地说明大气污染过程,需结合光化学分析超级站数据进行综合分析。

Based on the analysis of the characteristics of air quality changes in different cities,the article analyzes the application of the aerosol lidar in the atmospheric boundary layer height measurement,and also analyzes the aerosol particle characteristics and the vertical spatial-temporal evolution in the heavy pollution weathers,fireworks and firecrackers,and dust weathers.The results show that the aerosol lidar can perform a vertical/walk scanning,a horizontal scanning,a section scanning and a cone scanning.The analysis results of the vertical high altitude atmosphere are better,and the extinction coefficient and depolarization ratio can characterize the particle characteristics as well.In addition,the lidar navigation vehicle can be monitored on the move at any time,which has significant advantages in the traceability of particulate pollution.However,the aerosol lidar analysis result is relatively single.In order to give a more accurately explaination on the air pollution process,it is necessary to combine the data from the photochemical analysis super stations for a comprehensive analysis.