近地面臭氧污染过程和相关气象因子的分析

为了了解₃的污染过程，进行了包括全天24h₃浓度和气象参数的观测。分析了高浓度₃日的气象条件，表明高压天气形势、晴天少云、日照持续、气温升高、湿度低、温度垂直梯度和Ri数较高等是形成高浓度₃的有利条件。从₃浓度全天24h的观测结果发现，除12:00～14:00的主峰外，在0:00～4:00还有一个次峰。所有例子都表明₃浓度日变化和各气象因子有着很好的对应关系，值得注意的是，当风速和太阳辐射同步增减时，共同促使₃浓度增大，使₃在中午出现显著的峰值，当风速值出现在其他时间时，也可以使₃出现次峰。 

Ozone Pollution Process in the Lower Atmosphere and the Meteorological Factors Concerned

Based on the previous work, the ozone pollution processes including 24 hour ozone concentrations and meteorological parameters were observed. The results show that the appear-ance of high ozone concentrations resulted from the weather conditions, e. g., high pressure sys-tem, clear day,long sunshine, high temperature, low humidity as well as high values of Ri andΔT/ΔZ. The 24 hour daily variation curves of O3-NOx demonstrate that,in addition to the main peak at 12:00-14:00, a second peak appeared at 0:00-4:00. A good corresponding rela-tion also exists between the daily variations of ozone concentrations and the meteorological fac-tors. A notable peak value of ozone concentration occurred at noon when the wind speed and so-lar radiation reached their peak values synchronously. A second peak of ozone could also occur when the peak value of wind speed appeared at another time.