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The Impact of Meteorological Factors on PM2.5 Variations in Hong Kong

IOP conference series. Earth and environmental science, 2017-07, Vol.78 (1), p.12003 [Peer Reviewed Journal]

Published under licence by IOP Publishing Ltd ;2017. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1755-1307 ;EISSN: 1755-1315 ;DOI: 10.1088/1755-1315/78/1/012003

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  • Title:
    The Impact of Meteorological Factors on PM2.5 Variations in Hong Kong
  • Author: Li, X ; Feng, Y J ; Liang, H Y
  • Subjects: Correlation analysis ; Correlation coefficient ; Correlation coefficients ; Mathematical analysis ; Meteorology ; Particulate matter ; Rainfall ; Relative humidity ; Wind ; Wind direction ; Wind speed
  • Is Part Of: IOP conference series. Earth and environmental science, 2017-07, Vol.78 (1), p.12003
  • Description: This paper aims to explore the impact of meteorological factors on PM2.5 concentrations in Hong Kong. The PM2.5 and meteorology data including temperature, pressure, rainfall, relative humidity (RH), wind speed and wind direction from January to December of 2013 were collected. The correlation analysis between PM2.5 and meteorological factors were conducted for each month and season. The meteorology data were classified into several intervals and the mean PM2.5 concentrations for each interval were calculated to see the tendency. According to the correlation analysis results, the PM2.5 concentrations have a positive relationship with pressure with correlation coefficients 0.507 while have negative relationships with temperature, RH, rainfall, wind speed with correlation coefficients -0.512, -0.237, -0.524, -0.284, respectively. In addition, the wind direction influence PM2.5 concentrations through affecting the spreading direction of PM2.5. The north wind in winter increased the PM2.5 in Hong Kong while the south wind in summer decrease the PM2.5. Therefore, the meteorological factors affect the aggregation, diffusion, spread of PM2.5. They have a leading impact on PM2.5 concentrations when the domestic emission stays stable.
  • Publisher: Bristol: IOP Publishing
  • Language: English
  • Identifier: ISSN: 1755-1307
    EISSN: 1755-1315
    DOI: 10.1088/1755-1315/78/1/012003
  • Source: IOP Publishing Free Content
    IOPscience (Open Access)
    Alma/SFX Local Collection
    ProQuest Central
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