LAUSR

Based on the PM 2.5 concentration and economic and social data in the Yangtze River Delta during 2006–2016, the spatial distribution characteristics of PM 2.5 pollution and the spatial heterogeneity of its influencing factors are analyzed using exploratory spatial data analysis and a geographically weighted regression model. The results show the following . The PM 2.5 pollution situation is serious and presents a remarkable feature of spatial agglomeration in the Yangtze River Delta. Highly polluted areas are mainly concentrated in the northern cities of the Yangtze River Delta, while the air quality of the southern cities of the Yangtze River Delta is better. There is a significant positive spatial spillover effect of PM 2.5 pollution in the Yangtze River Delta, which is to say that the air quality will be worsened by the PM 2.5 pollution of surrounding cities . The influence coefficients of the population density, industrial proportion, car ownership and FDI on PM 2.5 have spatial heterogeneity; that is, there are significant differences in their degrees of influence between different periods and cities.