基于米散射气溶胶激光雷达分析2021年3月中国北方沙尘污染过程  

Analysis of sand-dust pollution processes in Northern China in March 2021 based on Mie scattering aerosol lidar

作　　者：刘达新[1] 宋慈 孙广赫 唐梓恒 谢晨波 庄鹏 LIU Daxin;SONG Ci;SUN Guanghe;TANG Ziheng;XIE Chenbo;ZHUANG Peng(Meteorological Observation Center of China,Beijing 100081,China;Anhui Lanke Information Technology Co.,Ltd,Hefei 230031,China;Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,China)

机构地区：[1]中国气象局气象探测中心,北京100081 [2]安徽蓝科信息科技有限公司,安徽合肥230031 [3]中国科学院合肥物质科学研究院安徽光学精密机械研究所,中国科学院大气光学重点实验室,安徽合肥230031 [4]先进激光技术安徽省实验室,安徽合肥230037

出　　处：《大气与环境光学学报》2024年第6期665-679,共15页Journal of Atmospheric and Environmental Optics

基　　金：安徽省2017年度高层次科技人才团队项目(01056790);2019年安徽省科技重大专项(201903c08020013);中国科学院A类战略性先导科技专项(XDA17040524);安徽省教育厅自然科学重点项目(KJ2021A0945)。

摘　　要：2021年3月,中国北方出现了三次大范围的沙尘污染。为准确认识三次沙尘污染传输过程,分析研究了京津冀地区米散射气溶胶激光雷达的垂直观测结果。激光雷达垂直观测结果显示,2021年3月份,三次沙尘污染过程的传输顺序均为:张家口—北京—廊坊(保定)—天津—秦皇岛。在此期间,京津冀地区全境范围内的污染天气受到西北风和北风作用,导致京津冀地区发生沙尘污染,其中,该地区的张家口和北京市受到这三次沙尘污染影响较重。在3月14—18日和3月27—31日两次较严重的沙尘传输过程中,污染在北京、廊坊、天津三个城市沿西北至东南方向传输,且三座城市的污染物质量浓度在依次降低。2021年3月份的这三次沙尘污染在沿西北到东南方向传输的过程中,对各城市影响在逐渐减弱。本工作根据气团移动轨迹和反演图谱对京津冀地区三次沙尘现象的污染过程作出了科学分析,为未来沙尘污染防治提供了案例和参考。In March 2021,there were three large-scale sand-dust pollutions in northern China.In order to accurately understand the transmission process of these three sand-dust pollutions,the vertical detection results of the Mie scattering aerosol lidars distributed in the Beijing-Tianjin-Hebei region in this period were analyzed and studied.The vertical detection results show that the transmission sequences of the three sand-dust pollutions processes in March 2021 were almost the same:Zhangjiakou,Beijing,Langfang(Baoding),Tianjin,Qinhuangdao,sequentially.During this period,the pollution weather in the Beijing-Tianjin-Hebei region was affected by northwest and north winds,resulting in sand-dust pollutions in this region.Among them,Zhangjiakou and Beijing in this area were seriously affected by the three pollution events.During the two more serious sand-dust pollutions from March 14 to 18 and from March 27 to 31,pollution was transmitted from northwest to southeast in Beijing,Langfang and Tianjin,and the concentration of pollutants in the three cities decreased in turn.Overall,during the three sand-dust pollutions in March 2021,the impact on various cities gradually weakened as they transported from northwest to southeast.Based on the air mass movement trajectory and the retrieve mapping,a scientific analysis was made on the pollution processes of the three sand-dust events in the Beijing-Tianjin-Hebei region,which provides a case and reference for the prevention and control of sand-dust pollution in the future.

关 键 词：沙尘传输 米散射激光雷达 消光系数 退偏振比 

分 类 号：TN958.98[电子电信—信号与信息处理]