徐州市区大气臭氧变化特征及与气象要素的相关性分析研究

Analysis on Variation Characteristics of Ozone and Correlation with Meteorological Elements in Urban Atmosphere of Xuzhou

根据2016年徐州市区7个自动空气监测子站的臭氧(O_3)与气象要素的连续观测数据,探讨了徐州市区大气中O_3浓度的变化特征及与气象要素的关系。结果表明:2016年徐州市区O_(3-8h)浓度为12~206μg/m^3,年均值为122μg/m^3;O_3浓度呈现夏季>春季>秋季>冬季的季节性变化特征和"单峰型"的日变化特征。O_3浓度与温度呈正相关性,与湿度和气压呈负相关性;当气压<1 010 hpa,气温>25℃,相对湿度<50%时,O_(3-8h)容易出现超标污染。

The characteristics of ozone concentration and its relationship with meteorology were analyzed by continuous observation from seven automatic air-monitoring stations in urban city of Xuzhou. The results showed that the concentration of O（3-8h） was 12 - 206 μg/m^3 in the urban area of Xuzhou in 2016,and the annual concentration was 122 μg/m^3. The seasonal variation was also clear that ozone concentration was the least in winter and the most in summer. Diurnal variation of ozone concentrations exhibited with the characteristic of a single peak. Ozone concentration was positively correlated with temperature and negatively correlated with humidity and air pressure. The concentration of O（3-8h） exceeded the secondary standard while the pressure was less than 1010 hpa,the temperature was higher than 25 degrees and the relative humidity was lower than 50%.