Study on the Impact of Meteorological Elements on the Formation of Near Surface Ozone Pollution
The near surface ozone(O3)is an important pollutant that is harmful to human health and vegetation growth,and the formation of O3 is influenced by meteorological conditions(diffusion,dilution,and other physical processes),chemical reaction generation/removal rates,and source emission intensity.Taking Linyi city,Shandong province as the research area,based on historical monitoring data and meteorological data of O3 from 2019 to 2022,the variation characteristics of near surface O3 is deeply analyzed in different intervals of meteorological elements such as temperature,relative humidity,wind speed,precipitation,and wind direction,and the influence of meteorological elements is clarified on the concentration of Volatile Organic Compounds(VOCs)in O3 precursors.The research results indicate that O3 concentration is positively correlated with temperature and negatively correlated with relative humidity,precipitation,and wind speed.When the average temperature is 25～30℃,the daily maximum temperature is greater than 35℃,and the temperature difference is greater than 8℃,the O3 concentration is most likely to exceed the standard,and the average temperature,daily maximum temperature,and temperature difference can all indicate the phenomenon of O3 exceeding the standard,but the influence of temperature difference and daily maximum temperature is more obvious.When the temperature is 25～35℃and the relative humidity is 40％～60％,the O3 concentration in Linyi city is prone to high values,and temperature and relative humidity have opposite effects on VOCs. When the wind speed is less than 2 m/s,the concentration of VOCs is highest. As the wind speed gradually increases,the concentration of VOCs gradually decreases. When southerly winds prevail in Linyi city with wind speeds of 6～8 m/s,special attention should be paid to the pollution trend of O3. The research results contribute to understanding the transport,diffusion,and chemical reaction processes of O3 in the atmosphere,and can be used to preliminarily determine the source of O3,providing support for the analysis of O3 sources in cities.
万方数据
维普
