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Regional atmospheric pollutant transport mechanisms over the North China Plain driven by topography and planetary boundary layer processes

Quan, Jiannong

Atmospheric environment. Volume 221: (2020, January 15th) -- Elsevier Ltd

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  • Title:
    Regional atmospheric pollutant transport mechanisms over the North China Plain driven by topography and planetary boundary layer processes
  • Author: Quan, Jiannong;
    Dou, Youjun;
    Zhao, Xiujuan;
    Liu, Quan;
    Sun, Zhaobin;
    Pan, Yubing;
    Jia, Xingcan;
    Cheng, Zhigang;
    Ma, Pengkun;
    Su, Jie;
    Xin, Jinyuan;
    Liu, Yangang
  • Found In: Atmospheric environment. Volume 221: (2020, January 15th)
  • Journal Title: Atmospheric environment
  • Subjects: Air--Pollution--Meteorological aspects--Periodicals; Air--Pollution--Periodicals; Vertical vortex--Elevated pollutant layer--PBL--Regional pollutant transport; Dewey: 551.51
  • Rights: Licensed
  • Publication Details: Elsevier Ltd
  • Abstract: Abstract Comprehensive measurements were conducted in winter 2018 and combined with RMPAS-Chem model simulations to analyze the regional transport mechanisms of atmospheric pollutants over the North China Plain. The instruments used consisted of four Vaisala CL51 ceilometers for planetary boundary layer (PBL) heights and aerosol backscatter profiles, two wind profilers, one radiosonde for the profiles of meteorological variables, and an instrumented King-Air 350 aircraft for the profiles of atmospheric pollutants and meteorological variables. Additionally, observations from Environmental Protection Bureau stations were also analyzed, including hourly concentrations of surface PM2.5, SO2, NO2, CO, and O3. The results suggest that regional atmospheric pollutant transport is driven by a combination of topography and PBL processes. First, a mountain-induced vertical vortex forms over downwind regions; this elevates ground pollutants to form an elevated pollutant layer (EPL) at an altitude of 1.4–1.7 km. The EPL is then transported to Beijing via an enhanced southerly wind. Finally, the pollutants in the EPL are transported downward to the surface through PBL processes. Highlights The mountain-induced vortex elevated surface pollutants to high layer. Pollutant in the EPL was transported downward to the surface through PBL process. Regional atmospheric pollutant transport mechanisms over NCP are suggested.
  • Identifier: System Number: ETOCvdc_100093709984.0x000001; Journal ISSN: 1352-2310; 10.1016/j.atmosenv.2019.117098
  • Publication Date: 2020
  • Physical Description: Electronic
  • Shelfmark(s): 1767.120000
  • UIN: ETOCvdc_100093709984.0x000001

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