摘要
利用绵阳市2016-2018年环境空气监测数据及气象资料分析臭氧与颗粒物(PM 2.5,PM 10)的质量浓度变化特征,同时对臭氧、颗粒物与气象参数之间相关性进行研究。结果表明,随着大气污染防治措施的持续推进,绵阳市环境空气质量呈好转趋势,PM 2.5浓度逐年下降,冬季和春季颗粒物质量浓度较高,但臭氧浓度表现为增长趋势,春季或夏季臭氧质量浓度最高。2016-2018年O 3-8 h与颗粒物(PM 2.5,PM 10)表现为低度负相关,相关系数仅为-0.236和-0.139,但夏季O 3-8 h与颗粒物(PM 2.5,PM 10)均呈显著性正相关,相关系数分别为0.496和0.569,夏季臭氧和颗粒物需要进行协同管控。O 3-8 h与温度、风速为显著性正相关,与相对湿度、大气压强均为显著性负相关,但与春季的风速、夏季的风速和大气压强均未通过显著性检验,表现为不相关。加大NO x和VOCs等前体物的协同减排力度对降低臭氧和颗粒物浓度至关重要。
Based on the ambient air monitoring data and meteorological data from 2016 to 2018 in Mianyang City,the variation characteristics of mass concentration of ozone and particulate matter(PM 2.5,PM 10)were analyzed.At the same time,the correlation between pollutant concentration(ozone and particulate matter)and meteorological parameters was further investigated.The results show that ambient air quality was gradually improving each year by the continuous prevention and control of atmospheric pollution.The annual mean of PM 2.5 decreased year by year in Mianyang.The concentration of particulate matter was higher in winter and spring.However,the annual concentration of 8 h ozone tended to increase,with the highest concentration of ozone in spring or summer.8 h ozone has a low negative correlation with particulate matter(PM 2.5,PM 10)from 2016 to 2018,with the correlation coefficients of-0.236 and-0.139 respectively.However,they are positively related in summer,with the correlation coefficients of 0.496 and 0.569,respectively.Therefore,particulate matter and 8 h ozone need to be controlled together in summer.8 h ozone was positively correlated with temperature and wind speed,negatively correlated with relative humidity and atmospheric pressure,but uncorrelated with wind speed in spring,wind speed and atmospheric pressure in summer.In the later stage,it is particularly important to control lower nitrogen oxide gases(NO x)and volatile organic compounds(VOCs)emissions in order to reduce ozone and particulate matter.
作者
杜娟
宋鹏程
彭同江
DU Juan;SONG Pengcheng;PENG Tongjiang(City College,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Mianyang Environmental Monitoring Central station,Mianyang 621010,Sichuan,China;Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
出处
《西南科技大学学报》
CAS
2020年第1期31-38,共8页
Journal of Southwest University of Science and Technology
基金
教育部产学合作协同育人项目(201801275004)。
关键词
臭氧
颗粒物
相关性分析
绵阳市
Ozone
Particulate matter
Correlation analysis
Mianyang
