长三角地区城市密度对碳排放绩效的影响效应与机制OA北大核心CHSSCDCSTPCD

Urban density is a representation of the spatial clustering degree of various elements within a city and is also an important means regulating the efficiency of resource allocation among these elements.Previous studies have predominantly focused on the physical form of urban density to examine the utilization of urban spatial resources and environmental concerns,with little consideration for carbon emission performance in studying the evolutionary logic of urban density.This study is grounded in the viewpoint of maximizing ecological benefits by minimizing natural resource input and maximizing value gained.A comprehensive evaluation index of carbon emission performance is constructed from three dimensions:economic,social,and environmental.Taking 41 cities in the Yangtze River Delta as an example,the spatio-temporal evolution and correlation characteristics of urban density and carbon emission performance were analyzed based on standard deviation ellipse.The geographic weighted regression models and Geodetecor were used to determine the impact effect and mechanism of urban density on carbon emission performance.The results indicate that:(1)Both urban density and carbon emission performance have increased,with the growth rate of urban density slowing down while the growth rate of carbon emission performance accelerating.The development pattern exhibits a southeast-to-northwest development pattern with continuously strengthening correlation.(2)There are spatiotemporal differences in the impact of sub-indicators of urban density on carbon emission performance.In the southeastern region,most cities show an increase in the impact coefficient of each sub-indicator,maintaining directions of influence.Conversely,in the northwestern region,population density's negative impact significantly intensifies,economic density changes from negative to positive influence,and spatial density's impact shifts from positive to negative.(3)The interaction between urban density and other economic and social factors influences carbon emission performance.The synergistic effect between economic density and industrial structure has the greatest impact on carbon emission performance.Additionally,compared to the independent effects of factors,the interaction effect between population density and other influencing factors experiences the most significant increase.Clarifying the impact and mechanisms of urban density on carbon emission performance can provide a basis for the rational optimization of urban spatial structure.