云南景洪2016年大气O3特征研究

Research on Characteristics of Ozone in Air of Jinghong in 2016

以云南省景洪市大气O_3为研究对象,分析了其质量浓度的时空分布特征及气象影响情况。结果表明,景洪O_3质量浓度日变化呈现单峰特征,每天下午15点前后浓度达到最高值,8h最大浓度超标天数达51d,集中在天气干燥的3—5月份,且云南高原地区紫外线照射强烈存在典型的大气光化学生成臭氧现象。相关性研究表明,该地区O_3浓度变化与紫外辐射强度及NO2的相关性较好。

The temporal and spatial distribution of mass concentration of ozone in air in Jinghong was examined as well as the meteorological factors.The results showed that a single daily peak emerged around3pm in the after-noon.The days of8h maximal concentration that was over the national standard were51days.All of them were ob-served during the dry season between March and May.Furthermore,ozone phenomenon was formed by air solar photochemistry due to the strong ultraviolet irradiation in plateau area.The research also indicated that the changes of ozone concentration were highly correlated with ultraviolet irradiation and N02.