Qiaoli Bu1,2, Yingying Hong This email address is being protected from spambots. You need JavaScript enabled to view it.2, Haobo Tan This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Li Liu3, Chunlin Wang4, Jianjun Zhu5, Pakwai Chan6, Chen Chen1 

1 Meteorological Bureau of Foshan City, Foshan 528227, China
2 Ecological Meteorology Center of Guangdong Province, Guangzhou 510640, China
3 Key Laboratory of Regional Numerical Weather Prediction, Guangzhou Institute of Tropical and Marine Meteorology, Guangzhou 510080, China
4 Guangzhou Climate and Agrometeorology Center, Guangzhou 510080, China
5 Meteorological Bureau of Liwan District, Guangzhou 510000,China
6 Hong Kong Observatory, Hong Kong, China


Received: March 2, 2020
Revised: June 28, 2020
Accepted: July 3, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.4209/aaqr.2020.03.0084  

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Cite this article:

Bu, Q., Hong, Y., Tan, H., Liu, L., Wang, C., Zhu, J., Chan, P. and Chen, C. (2020). The Modulation of Meteorological Parameters on Surface PM2.5 and O3 Concentrations in Guangzhou, China. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2020.03.0084


  • The critical values of key meteorological parameters were quantified.
  • Guangzhou was likely to suffer from severe air pollution under westerly wind.
  • The weather condition was the most unfavorable to air quality in 2014.


PM2.5 and ozone (O3) are two major pollutants worsening air quality in China. Taking Guangzhou as an example, we utilized the meteorological data from 4 weather stations and air quality data from 10 environmental monitoring stations during 2014-2016 to explore the variability of PM2.5 and maximum daily 8-hour average (MDA8) O3 concentrations in different ranges of major meteorological parameters. Critical values of individual meteorological parameters for the variability of pollutant concentrations were calculated. For PM2.5, the hourly concentration tended to increase when relative humidity > 50 %, hourly rainfall intensity ≤ 0.6 mm hour-1 or wind speed ≤ 1.8 m s-1, otherwise it tended to decrease. As for MDA8 O3, sunshine duration > 4 hours, the maximum temperature > 29 ℃ or daily average wind speed ≤ 1.8 m s-1 would tend to increase the concentration, while the opposite would decrease it. The wind direction is also an important meteorological parameter affecting pollutant concentrations. Under the control of the westerly wind, Guangzhou suffers from severe air pollution with a strong possibility. We used the critical values of these meteorological parameters as indicators to evaluate the favorability of meteorological conditions to air quality and found that the weather condition in 2014 was the most unfavorable in the past three years (2014-2016). This study gives a further understanding of the relationship between meteorological parameters and pollutant concentrations. The novel methods proposed in this study could be applied to guide air quality forecasts from a perspective of meteorological parameters, as well as compare the effect of weather conditions on air pollution for different years.

Keywords: Meteorological parameters; Critical value; PM2.5; Ozone; Guangzhou.

Aerosol Air Qual. Res. 20 :-. https://doi.org/10.4209/aaqr.2020.03.0084  

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