On Spatio-temporal Coupling Analysis of Carbon Emission Efficiency and Industrial Structure Optimization in Urban Agglomeration of the Middle Reaches of the Yangtze River
Exploring the interaction between carbon emission efficiency and industrial structure optimization could provide a reference for promoting the low-carbon coordinated development of the middle reaches of the Yangtze River urban agglomeration.This paper used the undesirable output SBM model to calculate the carbon emission efficiency of 31 cities in the middle reaches of the Yangtze River urban agglomeration from 2010 to 2020.Besides,using the the coupling coordination model,spatial auto-regression model and grey relational analysis,it analyzed the spatio-temporal evolution characteristics and influencing factors of the coupling and coordination of carbon emission efficiency and industrial structure optimization.The results showed that:(1)During the research period,the coupling coordination degree of carbon emission efficiency and industrial structure optimization in the middle reaches of the Yangtze River urban agglomeration remained stable with the figure ranging from 0.505 to 0.522,a barely coordinated state but that of sub-city clusters had significant differences yet without breaking through the primary coordination limit;(2)The distribution of coupling coordination degrees among cities in the middle reaches of the Yangtze River urban agglomeration was uneven,presenting a spatial distribution pattern of Poyang Lake urban agglomeration>Wuhan urban circle>Chang-Zhu-Tan urban agglomeration.Between 2017 and 2020,there was a significant spatial agglomeration effect among the cities,and the degree of spatial agglomeration was constantly increasing;(3)Except for the expenditure of science and technology budget,other factors were strongly correlated with the coupling coordination degree.The promotion effect of technological investment on the coupling and coordination of carbon emission efficiency and industrial structure optimization was not yet apparent.
carbon emission efficiencyindustrial structure optimizationcoupling and coordinationspatio-temporal evolutionurban agglomeration in the middle reaches of the Yangtze River