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Characteristics of long-range transported PM2.5 at a coastal city using the single particle aerosol mass spectrometry

  • Cai, Qiuliang (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • Tong, Lei (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • Zhang, Jingjing (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • Zheng, Jie (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • He, Mengmeng (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • Lin, Jiamei (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences) ;
  • Chen, Xiaoqiu (Environmental Monitoring Center of Fujian) ;
  • Xiao, Hang (Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences)
  • 투고 : 2018.10.07
  • 심사 : 2019.01.13
  • 발행 : 2019.12.30

초록

Air pollution has attracted ever-increasing attention because of its substantial influence on air quality and human health. To better understand the characteristics of long-range transported pollution, the single particle chemical composition and size were investigated by the single particle aerosol mass spectrometry in Fuzhou, China from 17th to 22nd January, 2016. The results showed that the haze was mainly caused by the transport of cold air mass under higher wind speed (10 m·s-1) from the Yangtze River Delta region to Fuzhou. The number concentration elevated from 1,000 to 4,500 #·h-1, and the composition of mobile source and secondary aerosol increased from 24.3% to 30.9% and from 16.0% to 22.5%, respectively. Then, the haze was eliminated by the clean air mass from the sea as indicated by a sharp decrease of particle number concentration from 4,500 to 1,000 #·h-1. The composition of secondary aerosol and mobile sources decreased from 29.3% to 23.5% and from 30.9% to 23.1%, respectively. The particles with the size ranging from 0.5 to 1.5 ㎛ were mainly in the accumulation mode. The stationary source, mobile source, and secondary aerosol contributed to over 70% of the potential sources. These results will help to understand the physical and chemical characteristics of long- range transported pollutants.

키워드

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