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运用一种新型边界层气溶胶监测激光雷达,在北京丰台区进行了外场实验,探讨了大气边界层(PBL)内气溶胶消光系数与湿度、风速等气象条件的关系,并给出了消光系数的时空分布。实验结果表明,水平大气气溶胶消光系数与黑碳质量浓度、地面风速等近地气象因子均有较好的相关性;边界层气象因子直接影响气溶胶的时空扩散和分布;在近地面风速较小等条件下,北京城区气溶胶污染在凌晨和上午较下午和前半夜严重。
In this paper, a new boundary layer aerosol monitoring lidar was used in outfield experiments in Fengtai District of Beijing to discuss the relationship between aerosol extinction coefficient and humidity and wind speed in the atmosphere boundary layer (PBL). The extinction coefficient Spatial and temporal distribution. The experimental results show that the horizontal atmospheric aerosol extinction coefficient has a good correlation with near-surface meteorological factors such as black carbon mass concentration and surface wind speed. The boundary layer meteorological factors directly affect the space-time diffusion and distribution of aerosols. Under the conditions of small scale, aerosol pollution in urban Beijing is more severe in the early morning and early morning than in the early afternoon and in the middle of the night.