2019年江苏省臭氧污染与气象条件影响分析研究

The Analysis of the Ozone Pollution and Its Relationship with Meteorological Factors in Jiangsu Province in 2019

江苏省臭氧污染逐年上升,已成为影响城市空气质量的重要因素,利用环境监测数据和气象要素数据,分析了臭氧污染较重的2019年江苏省臭氧污染特点,以及与气象条件之间的相互关系。结果表明:江苏省臭氧浓度逐年增高,沿江苏南区域高于苏北城市;臭氧污染主要分布于4~9月,污染较重集中在5~6月。臭氧浓度与气象要素之间的关系非常密切,与温度呈正相关,与相对湿度呈负相关,当气温超过25℃,湿度在60%以下,偏南风(SSW~SSE),风速在2~4m/s时,臭氧超标率最高,易出现高浓度臭氧,从逐月气象因子与臭氧超标率的关系来看,5~6月的气象条件更易出现臭氧污染。研究臭氧污染的时空变化规律和与气象条件之间的关系,为区域臭氧污染防治,前体物排放管控,有较为有效的指导意义。

The ozone pollution in Jiangsu Province has been increasing year by year, and has become an important factor affecting urban air quality. Based on air monitoring data and meteorological data sharing from Jiangsu institute department in 2019, this paper analyzed the characteristics of ozone pollution and its relationship with meteorological factors. The results showed that the ozone concentration increased year by year in Jiangsu province, which was higher in southern region and lower in the northern region. The ozone concentration was at a high level from April to September, and the moderately polluted days ware concentrated from May to June. There is a close relationship between ozone concentration and meteorological elements, the ozone concentration was overall positively correlated with the temperature, and negatively correlated with relative humidity. When the temperature is over 25℃, relative humidity is below 60%, southerly wind(SSW~SSE),and wind speed is between 2 and 4m/s, the ozone over standard rate was highest,, and high concentration ozone is easy to appear. From the relationship between monthly meteorological factors and ozone exceeding standard rate, ozone pollution is more likely to occur in meteorological conditions in May and June.. The study of the temporal and spatial variation of ozone pollution and its relationship with the meteorological conditions is of great significance for the prevention and control of regional ozone pollution and the emission control of precursors..