Analysis and Spring and Summer Forecast on Characteristics of Ozone Concentration in Chengdu Plain
To quantitatively analyze the meteorological causes of ozone pollution in Chengdu Plain and to explore the differences among cities in this region,the spatial and temporal characteristics of ozone and pollution days in each of the eight cities in Chengdu Plain from 2015 to 2020 were analyzed.The results showed that the diurnal variation of ozone in the Chengdu Plain was basically the same,with a single peak,and the ozone concentration reached its peak at about 16:00.The peak ozone concentration in summer was significantly higher than that in other seasons,followed by spring and the least in winter.Chengdu Plain was prone to mild ozone pollution from April to October,with moderate pollution likely to occur from April to August.The ozone pollution in the cities of Chengdu Plain was ranked as follows:Chengdu＞Deyang＞Meishan＞Ziyang＞Leshan＞Mianyang＞Suining＞Ya'an.Based on the correlation between ozone concentration and meteorological factors,the high ozone concentration forecast equation with multiple indexes overlapped by season was established with the multiple regression method.After the test with real data,the equation showed good predictability.
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