Evaluation and analysis for Haze discrimination criteria in Jiangsu Province

This paper analyzes the distribution of haze under different conditions of winter in Jiangsu Province in 2014. Selected the city of Nanjing and Xuzhou as typical polluted cities, the analysis and comparison of different haze day's discrimination criteria are different. when the haze pollution is lighter, there are different methods, but when the haze pollution is relatively serious, the three methods of determine the haze day difference are almost same. The results showed that the concentration of pollution was higher in Nanjing and Xuzhou whose haze days were more.And the concentration of PM10 and PM2.5 exceeded the national standard 38.9% and 42.2% respectively in the Nanjing, 51.1% and 55.6% respectively in Xuzhou. Nanjing and Xuzhou are affected by both local and external sources.