春节期间太原市环境空气质量变化

对包含春节节日的2014年1月16日至2月15日太原市环境空气中O3、NO2、CO、SO2、PM2.5、PM10的质量浓度监测数据进行了统计分析，并就春节期间燃放烟花爆竹及气象因素对空气质量产生的影响利用Pearson分析展开相关研究。结果表明：烟花爆竹集中燃放阶段，O3的质量浓度日变化基本不受其直接影响、呈单峰型，其他污染因子由双峰型变化为明显的三峰型，PM2.5、PM10污染突出，PM10增加速率高于PM2.5，PM2.5/PM10的3个谷值与污染因子的3个峰值相对应；分析气温、相对湿度、风速对CO、PM2.5、PM10的影响均在0.01显著水平上相关，但对于烟花爆竹集中燃放污染水平，气温、相对湿度对其影响不大，风速对其影响较为突出，风向与其有明显的相关性。

Change of air quality in Taiyuan during the Spring Festival

The mass concentrations of O3, NO2, CO, SO2, PM2.5, and PM10 were analyzed from January 16 to February 15, 2016, to study the impact of fireworks and meteorological factors on air quality during the Spring Festival in Taiyuan. The data were evaluated with Pearson product-moment correlation coefficients. Results showed that fireworks basically did not affect O3 too much, and these data were distributed according to a unimodal mass type distribution. Conversely, the others air pollutants displayed bimodal to obvious tri-modal type distributions. During the day, pollution due to high levels of PM2.5 and PM10 was a serious problem. The daytime increasing rate for PM10 was higher than that of PM2.5, and three troughs of PM2.5/PM10 levels and three peaks of the pollution factor were observed. The temperature, relative humidity, and wind speed were correlated with CO, PM2.5, and PM10 concentrations at the 0.01 significance level. The use of fireworks and firecrackers tended to concentrate discharges of atmospheric pollutants, and during this period, the temperature and relative humidity had little effect on the pollution levels. In general, wind speed was a more important influencing factor on the air pollutants, and the wind direction showed obvious correlations with pollutant levels.