A Preliminary Study on the Relationship between Atmospheric Electric Field and Atmospheric Pollutants in Beijing

  • Jingxiao LI ,
  • Xuemeng CHEN ,
  • Yuexing CHENG ,
  • Rujian LI ,
  • Fan DONG
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  • <sup>1.</sup>Beijing Meteorological Disaster Prevention Center,Beijing 100089,China;<sup>2.</sup>Institute of Physics,University of Tartu,Tartu EE -50411,Estonia;<sup>3.</sup>Meteorological Service in Chaoyang District of Beijing,Beijing 100016,China;<sup>4.</sup>Environmental Meteorological Forecast Center of Beijing-Tianjin-Hebei,CMA,Beijing 100089,China

Received date: 2019-08-29

  Online published: 2021-02-28

Abstract

Atmospheric electric field and air pollutant concentrations measured at Beijing Chaoyang Site in the years of 2014 and 2015 were characterized for the overall diurnal variations and features in the winter and summer half-years.The relationship between the electric field intensity and the concentration of the main pollutant factors and the meteorological factors in three types of pollution weather, including static and stable accumulation type, pollution compound type and dust type, were mainly studied.The results showed that: (1) The hourly averaged electric field varied between 0.45 and 0.72 kV·m-1 on a diurnal basis, with peak values occurring at 03:00 (Beijing Time, the same as after) and 23:00, and troughs at 06:00 and 13:00.The correlation between electric field intensity and pollutant concentration was stronger in winter half year, especially with PM10, PM2.5, PM1.0 and NO2.(2) In the accumulation of locally emitted air pollutants, the electric field increased quickly with the rapid increase in pollutant concentrations.They exhibited similar variations.The electric field changed its sign to negative under high relative humidity.(3) The electric field or air pollutant concentrations showed no remarkable variations, nor did they follow each other in the condition of mixed-source pollution.On heavily polluted days when relative humidity was high, the correlation between electric field intensity and pollutant concentration was not strong.However, the correlation between electric field intensity and relative humidity was strong.(4) The electric field showed negative values during sand-dust events.This type of pollution was characterized by a rapid accumulation of air pollutants, which made the eclectic field to peak with a large absolute value followed by a quick drop in magnitude.The absolute value of the electric field was observed to decrease in the order of dust storm, blowing dust, and floating dust events.

Cite this article

Jingxiao LI , Xuemeng CHEN , Yuexing CHENG , Rujian LI , Fan DONG . A Preliminary Study on the Relationship between Atmospheric Electric Field and Atmospheric Pollutants in Beijing[J]. Plateau Meteorology, 2021 , 40(1) : 209 -218 . DOI: 10.7522/j.issn.1000-0534.2020.00006

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