Research on Variation Characteristics of Atmospheric Pollutants Concentration in Pengzhou

The evolution of atmospheric pollutants concentration (SO₂,NO₂,O₃,CO,PM₁₀ and PM_2.5) and the influencing factor were analyzed by making use of the atmospheric pollutants data and surface meteorological data from Pengzhou in 2017. The results showed that the fine particle (PM₁₀ and PM_2.5) pollution in this area was more serious, followed by O₃, and the concentration of other pollutants were lower than the corresponding values of the new National Ambient Air Quality Standards. The concentration of the atmospheric pollutants had significant seasonal and daily variations.The curves of diurnal variations of SO₂ and O₃ showed single peak, however, the NO₂, CO and fine particle were showed two peaks. The seasonal variations of pollutants concentration was basically appeared highest winter and lowest summer, followed by spring and autumn (O₃ appeared highest in summer and lowest in winter), moreover, there was a significant correlation between solid pollutants (PM₁₀, PM_2.5) and gaseous pollutants (NO₂, CO). The correlation analysis of pollutants concentration and meteorological elements indicated that the influence of relative humidity on pollutants concentration was weaker than that of temperature and wind speed on the whole. Except that O₃ was positively correlated with temperature and wind speed, other pollutants were negatively correlated with both. In addition, wind direction also has a direct impact on the accumulation and removal of local atmospheric pollutants.