中文摘要：

针对2013年12月和2014年12月南京地区秋冬季的2次典型霾污染过程,利用地面观测资料和常规气象资料,对这2次霾发生前后以及发生期间的天气环境、天气条件进行观测、分析。该文还通过HYSPLIT-4观察2次污染气团的来源,并利用CALIPSO分析2次污染期间气溶胶组分,发现由南京及周边地区形成、并在局地停留发展壮大的污染气团容易形成重大霾污染事件,污染物主要来源于当地的工厂、交通、建筑等;由北方携带大量污染物的气团入侵到南京地区,容易造成南京的霾污染天气,并且污染物组分以灰尘、污染性灰尘为主。由于天气条件的不同,2次污染发生期间的污染程度存在着巨大的差异。通过文章研究,发现稳定的气象条件容易发生霾天气,特别是当近地层风速较弱、混合层高度低、出现强逆温以及产生弱上升运动时,容易发生严重性霾污染天气。研究还发现各气象要素的共同作用导致了霾污染程度的变化。

英文摘要：

This paper focused on two typical haze pollution episodes respectively in December 2013 and December 2014 in Nanjing during autumn and winter. The ground observation data and conventional meteorological data were used to analyze weather conditions for two haze episodes. This paper also analysed the source of these two episodes by HYSPLIT-4,analysed the aerosol components by using CAPLIPSO. The polluted air mass formed and developed in Nanjing and other surrounding areas,is easily form major haze episode. The major source of pollution is from local factories,transportation,construction and so on. The air mass which was transported from the north,carrying large amounts of air pollutants to invade Nanjing area,usually causes the haze weather. The component of this air pollution is mainly based on the dust. There is a huge difference in degree during the two air pollution because of the different weather conditions. It was found that stable weather conditions are prone to the haze weather,especially when nearly formation velocity is weak,mixing height is low,the inversion temperature is strong and upward motion is weak,haze pollution will take place frequently. The study also found that the interaction of various meteorological elements lead to the change of haze pollution.