郑州市2015～2016年臭氧污染特征分析

Characteristics analysis of ozone pollution in Zhengzhou City in 2015-2016

目的:探讨郑州市臭氧的污染特征,为改善和提高郑州市的空气质量及减少臭氧所引起的相关危害提供科学依据。方法:利用郑州市2015年1月到2016年12月臭氧等空气污染物的监测数据,从臭氧超标的情况、季节变化趋势、作为首要污染物出现的变化趋势以及臭氧的日变化趋势等方面,系统的总结臭氧的污染特征。结果:2015年和2016年郑州市8 h平均臭氧浓度总超标天数分别为37 d(超标率为10.14%)和68 d(超标率为18.58%);且臭氧浓度在5~9月份内连续多天超标。从季节变化趋势可知,郑州市夏季臭氧浓度较高;臭氧作为首要污染物也主要出现在5~9月份,且2016年臭氧污染明显比2015年严重;臭氧日变化趋势呈典型的单峰型分布,在06:00~07:00出现最小值,在14:00~16:00出现最大值。结论:郑州市2015~2016年臭氧污染愈发严重,且变化趋势具有明显的规律性。

Aim： To explore the characteristics of ozone（ O3） pollution in Zhengzhou City,and provide scientific evidences for improving air quality in Zhengzhou City and reducing the O3-related diseases. Methods： The characteristics of O3 pollution in Zhengzhou City were investigated based on the O3 relevant data from January 2015 to December 2016. The over-polluted days of O3,seasonal and daily variations and the distribution of O3 as the primary pollutant were analyzed systematically. Results： The over-polluted days of O3-8 h in Zhengzhou City were 37 d in 2015,and 68 d in 2016,and the exceeding standard rate was 10. 14% in 2015,and 18. 58% in 2016; meanwhile,the concentration of O3 exceeded the standard seriously from May to September. According to the seasonal change trends,the concentration of O3 in Zhengzhou City was higher in summer. As the primary pollutant,the O3 mainly appeared from May to September and the O3 pollution was apparently worse in 2016 than that in 2015. The diurnal change trend of O3 presented a clear unimodal pattern with its peak appearing during 14： 00 and 16： 00 and trough during 06： 00 and 07： 00. Conclusion： The O3 pollution becomes worse from 2015 to 2016 in Zhengzhou City,and there is an obvious regularity on the variation trends of O3 pollution.