【摘要】 根据 1 999年 1 1、1 2月及 2 0 0 1年 2月北京市几次雾过程的大气边界层探测资料 ,再配合大范围气象资料 ,分析了北京城市雾发生过程中的大气环流形势 ,对比研究了出现水雾和霾时不同的边界层结构特征 ,结合环境污染监测资料 ,分析了雾对城市大气环境的影响。结果表明 ,在雾的发生发展过程中 ,边界层的温度层结由雾前的逆温层转变为雾区内的近中性层结 ,雾的微物理结构变化也表现出对污染物的沉降作用明显减弱 ,造成在雾发生时 ,城市空气污染相对严重。同时 ,该文初步探讨了这种变化的物理机制更多还原

【Abstract】 Using the sounding data of several fog events in November and December 1999 and February 2001, associated with the wide range meteorological data, the circulation regime is analyzed, and the different properties of the structures of the boundary layer between water fog and haze are comparatively studied. Also analyzed are the effects of fog on urban air pollution associated with the data of air quality monitoring. The results show that in fog areas, the temperature stratification in the boundary layer changes from inversion before fog to near neutral stratification, and the effect of the microphysical structural change of fog on the deposition of air pollutants becomes weak obviously, further enhancing urban air pollution.更多还原