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新冠疫情期间南京市大气污染物成分特征研究

Study on the Characteristics of Air Pollutants Components in Nanjing During the COVID-19 Control Period
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摘要 2020年COVID-19疫情席卷全球,全国各地均采取了严格的管控措施,该文基于2018-2020年疫情管控同期南京市国控站点6项常规污染物、PM_(2.5)组分、气象等数据,利用相关性、组分重构等方法,系统分析了疫情管控措施对南京市大气污染物浓度及组分的影响。结果表明,NO_(2)、PM_(10)和PM_(2.5)浓度随着疫情管控力度的增强,呈明显下降趋势,其中PM_(2.5)中二次硝酸盐的削减最为明显,从污染物排放角度来看,移动源、扬尘源污染物排放量在管控后削减更为显著,主要体现为机动车和工地施工活动的急剧减少,这也为颗粒物的进一步管控提供了依据。 The COVID-19 swept the world in 2020,with strict control measures in place across the country.Based on the monitoring data of national control stations,PM_(2.5)component data and meteorological data before and after the epidemic control in early 2020,correlation analysis,component reconstruction and conversion rate analysis were used to analyze the main factors affecting air quality in Nanjing.The analysis results showed that the concentrations of NO_(2),PM_(10)and PM_(2.5)showed a significant downward trend with the strengthening of epidemic control.Compared with industrial sources,pollutant emissions from traffic sources and dust sources has been reduced more significantly after control,and the reduction of emissions from traffic sources under epidemic control has been effective in reducing NO,and secondary nitrates.In addition,Nanjing City must strengthen the coordinated control of NO,when controlling particulate matter in autumn and winter.
作者 闻欣 王春 田军 方雪 丁峰 WEN Xin;WANG Chun;TIAN Jun;FANG Xue;DING Feng(Nanjing Environmental Monitoring Center of Jiangsu Province,Nanjing 210013,China;Academy of Environmental Planning&Design,Co.,Ltd.,Nanjing University,Nanjing 210093,China)
出处 《环境科学与技术》 CAS CSCD 北大核心 2023年第5期117-124,共8页 Environmental Science & Technology
基金 南京市“十三五”生态环境质量报告书编制专项基金项目 江苏省PM2.5与臭氧管控方案研究与平台建设项目专项课题。
关键词 疫情管控 成分解析 污染物 epidemic control composition analysis pollutant
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