The Chenzhou city of Hunan province was selected as the research area, based on the data of 5 ambient air quality monitoring stations in Chenzhou city, the variation of concentrations of O3, PM2.5 and PM10, which are the major pollutants in ambient air, in different periods, time and points in Chenzhou were analyzed, and the concentration of O3, PM2.5 and PM10 in 2015 and 2016have done a comparative analysis. The result shows that he seasonal variation of O3, PM2.5 and PM10 concentration was large, the concentration of O3 was higher in summer and autumn than in the two season, low in spring and winter in the two season, PM2.5 and PM10 concentration in summer and spring was low in the two quarter, and high in autumn and winter in the two season. In the middle of the day, the concentration of O3 in daytime was significantly higher than that at night in summer and winter, also it will peak in the afternoon, the concentration of O3 in the spring and autumn is regularly the saddle type change, while PM2.5 and PM10 concentrationsat night are higher than in the daytime in the four seasons. In different functional areas, the concentration of PM2.5 and PM10 in mixed area and originalindustrial district will be higher than that in culture and education area, but O3 is just the opposite. Compared with 2015, the concentration of particulate matter (PM2.5 and PM10)decreased in 2016, but the concentration of O3 changed little. The above conclusions will provide reference for the establishment of corresponding air pollution control measures and environmental air quality prediction and early warning in Chenzhou.%以湖南省郴州市为研究区域,根据郴州市5个环境空气质量监测点数据,对郴州市环境空气中主要的首要污染物O3、PM2.5及PM10浓度在不同时期、不同时段及不同点位变化规律做了分析,并对2015和2016年O3、PM2.5及PM10的浓度做了对比分析.结果表明:O3、PM2.5及PM10浓度的季节性变化大,O3浓度夏秋两季高,春冬两季低,PM2.5及PM10浓度春夏两季低,秋冬两季高;在一天当中,O3浓度在夏冬两季昼间浓度明显高于夜间,在下午时段会出现峰值,春秋两季则呈现马鞍型变化规律,而PM2.5及PM10浓度在四季当中都是夜间浓度高于昼间;不同功能区中,混合区和原有工业区的PM2.5及PM10浓度会高于文教区,O3则刚好相反;与2015年相比,2016年颗粒物(PM2.5及PM10)浓度有所下降,但是臭氧浓度变化不大.上述结论将为郴州市制定相应的大气污染防治措施及环境空气质量预报预警提供参考依据.
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