2016年北京市春节大气颗粒物污染特征激光雷达监测分析

发布时间：2018-07-13 07:46

【摘要】：基于激光雷达大气颗粒物消光系数实时数据以及PM_(2.5)和PM_(10)自动在线监测数据对北京市2016年春节期间(2月7~13日)大气污染进行系统分析.除夕夜间受燃放烟花爆竹影响,大气颗粒物浓度在短时间内急剧攀升,市中心的官园站PM_(2.5)浓度最大值达到639.3μg·m~(-3),9 h内增长了近30倍,城郊的琉璃河站及定陵站颗粒物最大小时浓度均超过1 000μg·m~(-3),显著高于市中心的官园站.初三至初五存在持续的颗粒物高浓度污染且城郊的颗粒物浓度均高于市中心.激光雷达的监测结果表明,除夕燃放时段内3个站点105 m处的消光系数显著高于405 m,呈现出明显的鞭炮燃放排放污染特征.3个站点的垂直消光特性存在显著差异,大气清洁时1.0 km下定陵、车公庄及琉璃河的背景极值分别为0.09、0.20和0.19 km~(-1),2月8日00:00的消光系数最大值分别为0.23、1.36和1.19 km~(-1),为同时刻同高度背景值的2.6倍、6.8倍和6.0倍,燃放烟花爆竹使得颗粒物的消光系数短时间内急剧增大.
[Abstract]:Based on the real-time data of laser radar atmospheric particle extinction coefficient and automatic on-line monitoring data of PM_ (2.5) and PM_ (10), the air pollution in Beijing during the Spring Festival (February 7~13 day) was systematically analyzed. The atmospheric particle concentration rose sharply in the short time and PM_ (2.5) in the center of the city center. The maximum concentration reached 639.3 G. M~ (-3) and nearly 30 times in 9 h. The maximum hourly concentration of the particles in the suburb of Li Li River Station and Ding Ling Station were more than 1000 mu g. M~ (-3), which was significantly higher than that in the center of the city. The monitoring results show that the extinction coefficient of 3 sites at 105 m is significantly higher than 405 m, and there is significant difference in the vertical extinction characteristics of.3 sites with obvious emission and emission pollution. The background values of 1 km in the atmosphere cleaning, and the extreme value of the background of Kung Gong Zhuang and Li Li River are 0.09,0.20 and 0.19 km~ (-1), respectively, in February 8th. The maximum extinction coefficient of 00:00 is 0.23,1.36 and 1.19 km~ (-1), which is 2.6 times, 6.8 times and 6 times of the same height with the same height, and the fireworks and firecrackers make the extinction coefficient of the particles increase sharply in a short time.
【作者单位】：北京工业大学环境与能源工程学院;北京市环境保护监测中心;
【基金】：基金项目:基于新一代卫星遥感、地面监测与分析模式的区域空气质量综合监测研究与应用(Z161100001116013)
【分类号】：X513;X87

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