安阳市大气气溶胶激光雷达秋冬季监测案例

Case Analysis of Atmospheric Aerosol Lidar Monitoring in Autumn andWinter in Anyang City

2020年11月1日至2021年2月1日安阳市生态环境监控中心应用天眼气溶胶激光雷达对安阳市布点监测,通过该时段大量的数据记录气溶胶的时空变化、摸清本地污染物排放规律、沙尘雾霾传输等特征天气。通过气溶胶激光雷达垂直探空数据表明:11月至次年1月共出现:10次沙尘传输沉降过程,其中1月10~19日最为严重。沙尘传输高度到达安阳城区传输高度为2 km以内,浮尘高度在1 km以内,传输方位均为西北方向。11月至次年1月共计出现11次雾霾传输过程,传输高度集中在1 km以内,主要高度分布在600~800 m之间,传输方位以东北以及西南方位为主。11月至次年1月出现沙尘传输往往伴随边界层抬升,出现雾霾传输时往往伴随边界层下降。天眼系统水平雷达表明:信访局站点颗粒物主要来源于东南方位以及正东方位的扬尘源以及尾气源,银杏小区站点颗粒物主要来源于东南方位餐饮、散煤等燃烧以及部分工业源影响。从而进一步落实差异化减排措施,实施科学精准管控,协同推动生态环境高水平保护和经济高质量发展。

The main air pollutants in Anyang City are at a high concentration level throughout the country,ranking very low in the country.In order to find out the law of air pollution,the Anyang ecological environment monitoring center applied the Heavenly eye aerosol lidar to monitor the distribution of points in Anyang City from November 1,2020 to February 1,2021,and continuously operated for 3 months.Through a large amount of data in this period,it recorded the temporal and spatial changes of aerosol and found out the local pollutant emission law,sand,dust,haze transmission and other characteristic weather.According to the aerosol lidar vertical sounding data,there were 10 dust transport and sedimentation processes from November to January of the following year,of which the most serious was from January 10 to January 19.The transmission height of sand and dust reaches the urban area of Anyang City within 2km;the height of floating dust is within 1km,and the transmission direction is northwest.From November to January of the following year,there were 11 haze transmission processes.The transmission height is concentrated within 1km,and the main height is between 600~800 m.The transmission direction is mainly northeast and southwest.From November to January of the following year,the transport of sand and dust is often accompanied by the rise of the boundary layer,and the transport of haze is often accompanied by the fall of the boundary layer.The horizontal radar of Heavenly eye system indicates that the particulate matter at the station of the letter and visit bureau mainly comes from the dust source and tail gas source in the southeast and due east.The particulate matter at the station of Ginkgo community mainly comes from the combustion of catering,loose coal and some industrial sources in the southeast.Therefore,differentiated emission reduction measures are further implemented;scientific and accurate control are implemented to promote high-level protection of the ecological environment and high-quality economic development.