哈尔滨市臭氧时空分布特征及气象要素的关系

Based on monitoring data of ozone (O₃) from 2015 to 2018 in Harbin and other typical cities, this study analyzed the temporal and spatial distribution characteristics of O₃ in Harbin, and its relationship with meteorological factors. The O₃ pollution in Harbin was less than that in Beijing, Shanghai, Guangzhou, Changchun, Shenyang and Dalian from 2015 to 2018. O₃ pollution in Harbin had obvious seasonal patterns, that the O₃ over-standard rate in spring and summer was higher than the rate in autumn and winter. The monthly variation showed an inverted "U" type, with the O₃ high values concentrated in May, June and July. The daily variation of O₃ concentration showed a single peak distribution, that high concentration occurred from 13:00 to 15:00. A "weekend effect" was observed, that the O₃ concentration on working days was slightly higher than that during weekends. Spatial distribution characteristics showed that the O₃ concentration in the peripheral areas and counties of Harbin was generally higher than that in the inner city center. From May to July when O₃ pollution occurred frequently, the solar radiation intensity was 800~1200W/m², and the O₃ excessive rate is tightly associated with high air temperature, high wind speed and low relative humidity.