东北地区臭氧浓度空间格局演变规律及影响因素

采用重心模型、空间自相关分析、地理探测器，研究了2016年东北地区O₃浓度的空间分布格局及演变规律，揭示了气象因素和前体物对东北地区O₃浓度空间分布格局及演变的影响.结果表明：东北地区O₃-8 h-P90分布整体呈南高北低的态势，O₃浓度的高值区及超标天数比例较高的地区都集中分布在环渤海地区的沿海城市；气温是影响O₃年均浓度空间格局演变的主导因素，随着气温的变化，O₃年均浓度空间分布格局呈现空间分异不明显-南高北低-空间分异不明显的演变特征；前体物是核心城市形成局部O₃污染的主要原因，其影响力的大小受温度的影响，温度越高，光化学反应越强，前体物的正向影响力越大，温度越低，光化学反应越弱，化学性质活跃的前体物对O₃可能起消耗作用.

Evolution and influencing factors of ozone concentration spatial distribution in Northeastern region

Based on the methods of gravity center model, spatial autocorrelation analysis and geographical detector, this paper studied the evolution and spatial distribution of ozone concentration in Northeastern region of China in 2016, revealed the impact of meteorological factors and precursors on the spatial distribution and evolution of ozone concentration. The results showed that:the O₃-8 h-P90 of southern part was higher than that of northern part in the Northeastern region in general, the areas of high O₃ concentration and high proportion of over-standard days were concentrated in coastal cities around the Bohai Rim region. The evolution of the spatial pattern of O₃ annual average concentration was mainly affected by temperature, with the change of temperature, the evolutionary of O₃ concentration spatial pattern went through a not obvious spatial differentiation-higher in the south and lower in the north-not obvious spatial differentiation in 2016. The local O₃ pollution in core cities generated mainly because of precursors, its influence was affected by the temperature, a stronger photoreaction, as a result of rising temperature, positively magnified the impact of precursors, while the decreasing temperature weakened photoreaction, which, as a result, may promote ozone consumption.