2016—2019年郴州市环境空气质量变化特征分析

Analysis on the variation characteristics of ambient air quality in Chenzhou from 2016 to 2019

为掌握郴州市环境空气质量的变化情况,本文对2016~2019年郴州市环境空气质量的变化特征进行了研究。研究结果说明:郴州市空气质量达标率逐年提升,PM_(2.5)。PM10、SO_(2)、CO和NO_(2)年均浓度明显下降,2019年的达标率为94.0%;超标天以轻度污染为主,主要超标因子为PM_(2.5);城市周边居民燃放烟花鞭炮对环境空气也有较大影响。

In order to grasp the change of ambient air quality in Chenzhou,the paper studied the change characteristics of ambient air quality in Chenzhou from 2016 to 2019.The results show that the standard rate of air quality in Chenzhou increased year by year,the average annual concentration of PM_(2.5),PM10,SO_(2),CO and NO_(2)decreased significantly,and the standard rate was 94.0%in 2019.The days exceeding the standard was mainly light pollution,and the main factor exceeding the standard was PM_(2.5).Fireworks and firecrackers set off by residents around cities have a great impact on the ambient air.