利用2015年臭氧(O3)自动监测数据和源排放清单,分析了中原城市群O3浓度的空间、时间分布情况,探讨了中原城市群中城市间O3的相关性,以及O3浓度、NOx、VOCs、CO及汽车保有量间的相关性.指出中原城市群是全国更是河南O3污染的严重地区,O3浓度年内月度变化呈倒"V"型分布,具有明显的北部城市特征;中原城市群9个城市间除开封外其他8个城市间都呈高度正相关性,相关系数均为0.892～0.991;9个城市机动车保有量及NOx、VOCs和CO等前体物的年排放量与其年均O3浓度之间存在正相关性.分析认为,NOx、VOCs和CO等前体物的排放是中原城市群O3浓度偏高的主要影响因素,同时O3浓度也与日照时间、降雨量、植物源VOCs排放量及相邻城市间污染物的空间输送等因素有着密切的关系.%Based on the O3 automatic monitoring data and source emission inventory in 2015, the spatial and temporal distribution of O3 concentration in the Central Plains urban agglomeration was analyzed in this article, and the correlation of O3 between cities in the Central Plains urban agglomeration was explored, and then the correlation between the concentration of O3 , nitrogen oxides, VOCs, CO and car ownershipwas discussed. It is pointed out that the Central Plains urban agglomeration is one of a heavily infected area of O3 in China, especially in Henan province. The annual change of O3 concentration showed an inverted V-shaped distribution, which has the typical characteristics of cities in northern China. The 9 cities of the Central Plains urban agglomeration except Kaifeng had a high positive correlation with each other, and the correlation coefficients were between 0. 892-0. 991. In addition, there was a positive correlation between the annual emissions of 9 urban motor vehicles ownership and the NOx , VOCs and CO and their annual O3 concentrations. Though NOx , VOCs and CO precursors are the main influencing factors of the high concentration of O3 in the Central Plains urban agglomeration, it also has a close relationship with sunshine time, rainfall, plant source, VOCs emission and the spatial transport of pollutants between adjacent cities.
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