Spatial-temporal Evolution,Drivers And Decoupling Analysis Of Carbon Emissions In The Yangtze River Delta Based On Night Light Data

Global warming has aroused widespread concern around the world.In order to assume the responsibility of a major country and demonstrate its responsibility as a major country,China has pledged to achieve carbon peaking by 2030 and carbon neutrality by 2060.As the integrated development of the Yangtze River Delta has become a national strategy,the Yangtze River Delta is gradually exploring on the road of taking the lead in carbon peaking,which is of great significance to the smooth realization of carbon emission reduction.It can be seen that in order to achieve China’s "dual carbon" goal,it is of practical significance to lead the Yangtze River Delta to take the lead in taking measures to achieve carbon emission reduction while developing high-quality economy.In this paper,DMSP-OLS data and NPP-VIIRS data are fused and corrected to construct unifiedscale nighttime light data.On this basis,the exploratory spatial analysis method and LMDI decomposition method were used to analyze the spatiotemporal evolution characteristics and driving factors of carbon emissions in the Yangtze River Delta from 2001 to 2018,and the Tapio decoupling model was used to decouple the relationship between carbon emissions and economic growth.To reduce carbon emissions,explore the coordinated development path of economy and resources and environment,and provide a model for my country to achieve the "dual carbon" goal.The main research conclusions are as follows:(1)The carbon emissions per unit of GDP in the Yangtze River Delta continued to decline.Since2001,the Yangtze River Delta has experienced rapid economic development,increased energy consumption,and total carbon emissions have shown an upward trend,but the growth rate has slowed down significantly;carbon emissions per unit of GDP have continued to decline,showing a convergence trend.(2)The spatial distribution of carbon emissions in the Yangtze River Delta is uneven.The high-high agglomeration areas of carbon emissions are mainly concentrated in the economically developed eastern cities,and the low-low agglomeration areas are concentrated in the slightly backward western cities,with a certain degree of spatial aggregation.(3)The main factor behind the growth of carbon emissions in the Yangtze River Delta is economic development.The effect values of energy intensity and energy structure are negative,and the negative effect of energy intensity is more obvious.Economic development and population size have led to the growth of carbon emissions in the Yangtze River Delta region to varying degrees,but the positive effect of economic development is more obvious.(4)The level of decoupling of carbon emissions varies greatly among cities in the Yangtze River Delta.Most of the eastern cities are dominated by weak decoupling and strong decoupling,while most of the western cities are in a state of expansion connection or expansion negative decoupling.Based on the above conclusions,some countermeasures and suggestions for the development of carbon emissions in the Yangtze River Delta to achieve high-efficiency carbon emission reduction are put forward: first,to develop low-carbon energy technologies;second,to develop green economy according to local conditions;third,to optimize energy structure;fourth,to strengthen regional exchanges and cooperation.