东北地区臭氧浓度空间格局演变规律及影响因素

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.