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用微脉冲激光雷达(MPL)研究了机动车限行措施对城市大气污染影响。2007年8月北京市车辆限行期间,对近地面层气溶胶的光学特性进行连续立体监测,在对激光雷达系统及其数据处理方法讨论的基础上,反演了近地面层气溶胶消光系数、大气边界层高度以及颗粒物质量浓度的时空变化,通过和未限车期间近似气象条件下观测数据的分析比较,发现限车期间颗粒物质量浓度呈现下降趋势,监测区域上空大气污染层厚度减小,证明车辆限行减排是一项减轻城市大气污染的有效措施,为我国城市空气污染治理提供了科学依据和参考。
Micropulse laser radar (MPL) has been used to study the impact of vehicle traffic restrictions on urban air pollution. In August, 2007, the optical characteristics of near-surface aerosol were monitored continuously and continuously during the vehicle-limited period in Beijing. Based on the discussion of the lidar system and its data processing methods, the aerosol extinction coefficient of the near- The spatial and temporal variations of atmospheric boundary layer height and particulate matter mass concentration were compared with the observed data under the approximate meteorological conditions during the unrestricted vehicle period. It was found that the particulate matter concentration decreased during the restricted vehicle period, and the thickness of the air pollution layer over the monitoring area decreased. Vehicle limit emission reduction is an effective measure to reduce urban air pollution and provide a scientific basis and reference for the urban air pollution control in our country.