本文利用2008-2010年南京站的逐日地面观测资料，分析了近3年南京霾天气特征及其与气象要素的关系。结果表明：南京的霾以轻微和轻度为主，一年四季均出现较多，其中冬季最强；一天中11时出现霾最多，05时出现最少；风速在1—4m／s时霾出现得最为集中，约占82．3％，出现霾时东到东南风的概率最大；霾出现时相对湿度在70％～80％之间的最多，较严重的霾天气的发生需要较大的相对湿度条件。API指数与霾天气的关系分析表明，非霾日的API指数主要集中在空气质量优秀和良好等级，霾日的API指数主要集中在良好和轻微污染等级，达到污染级别的霾日仅占总霾日的24％。%The characteristics and relationship with meteorological elements of haze weather in nearly 3 years in Nanjing are analyzed by using daily surface observation data from year 2008 to 2010. The results show that the intensity of haze days in Nanjing are mainly slight and mild. It happens all the year around but strongest in winter. Haze phenomenon happens most at 11:00 and least at 5:00. In haze days or haze times, there is about 82.3% wind speed between 1 to 4 m/s and the wind is mainly east to southeasterly. The haze phenomenon often occur under condition of relative humidity between 70% and 80% , and more serious haze weather always need bigger relative humidity condition. The analysis of relationship between API and haze weather shows that the air quality on no-haze days are primary concentrated at excellent and good level, and the API indexes on haze days are mainly concentrated at good and slight pollution level. The haze days which reach to pollution level are only 20% of the total.
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