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福州地区冬春典型污染过程PM2.5特征及成因分析
Characteristics and Causes of Typical Pollution Process in Winter and Spring in Fuzhou Area
投稿时间:2019-06-24  修订日期:2019-11-21
DOI:10.19316/j.issn.1002-6002.2020.03.06
中文关键词:  福州  PM2.5  HYSPLIT  PMF
英文关键词:Fuzhou  PM2.5  HYSPLIT  PMF
基金项目:国家自然科学基金委促进海峡两岸科技合作联合基金(U1405235)
作者单位
胡清华 福建省环境监测中心站,福建福州350003 
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中文摘要:
      综合使用HYSPLIT、PSCF与CWT、PMF等分析方法,针对福建省福州地区冬春季节发生的多次污染过程(P1~P4),深入研究PM2.5典型污染特征、成因及其潜在源区等。初步分析认为PM2.5为影响P1~P4过程中福州地区环境空气质量的首要污染物。PM2.5组分特征分析表明,移动源对PM2.5污染有较大贡献,每次污染过程中的二次反应明显。HYSPLIT后向轨迹分析表明,P1、P2以本地污染源贡献为主,P3、P4存在较强的污染气团输送。PMF源解析分析P1、P2结果认为,福州地区冬春PM2.5主要来源均为机动车源,分别为35.86%和42.75%,二次源分别为24.55%和30.52%,而冬季P1过程中工业/燃煤源(29.06%)的来源贡献明显高于春季P2过程(19.92%)。P3、P4作为受到外来污染传输叠加影响的典型案例,颗粒物激光雷达监测发现P3的PM2.5污染主要受北方污染传输影响;PSCF与CWT 联合分析结果表明,P4中的PM2.5污染主要来自福州地区西南方向,颗粒物浓度贡献值高于80 μg/m3
英文摘要:
      By using the methods of HYSPLIT,PSCF,CWT and PMF models,the typical pollution characteristics,causes and potential source regions of PM2.5 were studied based on the multiple pollution processes (P1-P4) that occurred in Fuzhou during winter and spring in 2017 and 2018.The results showed that PM2.5 is the primary pollutant during the P1-P4 process in local area.The characteristic analysis of PM2.5 components showed that the mobile source had a significant contribution to PM2.5 pollution,and the secondary reaction was obvious in each pollution process.The backward trajectory analysis of HYSPLIT showed that P1 and P2 were mainly contributed by local pollution sources,while P3 and P4 were seriously affected by the transport of polluted air masses.According to the PMF analysis of P1 and P2,the main sources of PM2.5 in Fuzhou in winter and spring were vehicle sources,which were 35.86% and 42.75% respectively.The secondary sources were 24.55% and 30.52% respectively.The contribution of industrial/coal-fired sources was 29.06% in winter P1 process,which was obviously higher than 19.92% in spring P2 process.P3 and P4 were typical cases affected by the superimposition of external pollution transmission.Particulate matter lidar monitoring showed that PM2.5 pollution of P3 was mainly affected by northern pollution transmission.The analysis results of PSCF and CWT showed that the PM2.5pollution of P4 was mainly from the southeast areas of Fuzhou,and the contribution value of particulate matter was higher than 80 μg/m3.
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