2015—2017年遵义市汇川大气颗粒物浓度变化特征

Changing Characteristics of Atmospheric Particulates Concentrations in Huichuan District of Zunyi City 2015—2017

根据2015—2017年间空气自动站监测数据,分析了遵义市汇川区颗粒物浓度变化特征。结果表明,2015—2017年遵义市汇川PM_(10)与PM_(2.5)冬季污染最严重,燃煤排放对冬季颗粒物污染影响较大;汇川颗粒物日变化呈双峰型,峰值出现在上午和晚上,夜间峰值较白天高。相关性研究表明,各季节颗粒物均与NO_2呈显著正相关性,颗粒物与O_3在夏季、与SO_2在冬季分别显著相关;各种天气条件下颗粒物与相对湿度呈负相关性,在多云和晴天条件下颗粒物与风速、气温显著负相关。

Based on the monitoring data of air automatic station during 2015 to 2017 in HuichuanDistrict of Zunyi, the concentrations of PM10 and PM2.5 was analyzed to investigate their characte-ristics. The results showed that PM10 and PM2.5 pollution was the most severe in winter in 2015-2017, and the coal-fired emission was the main cause of particulate matter pollution. The particu-late matters in Huichuan District showed bimodal distribution in morning and evening, and thenighttime peaks were larger than the daytime peaks. Correlation studies showed that the particulatematters were significantly positively correlated with NO2 in different seasons, which were signific-antly correlated with O3 and SO2 in summer and winter, respectively. The concentrations of PM10and PM2.5 were negatively correlated with relative humidity in different weathers, and under cloudyand sunny conditions, and the particulate matters were significantly negatively correlated with wind speed and temperature respectively.