Decoupling effect and driving factors of carbon footprint in megacity Wuhan,Central China  

作　　者：Gao Pan Xinhang Li Deng Pan Wensheng Liu 

机构地区：[1]College of Life Science and Technology,Central South University of Forestry and Technology,Changsha 410004,People’s Republic of China [2]Central South Academy of Inventory and Planning of NFGA,Changsha 410014,People’s Republic of China

出　　处：《Ecological Processes》2023年第1期330-343,共14页生态过程（英文）

基　　金：Hunan Provincial Natural Science Foundation of China(2022JJ40193).

摘　　要：Background China’s 35 largest cities,including Wuhan,are inhabited by approximately 18%of the Chinese popula-tion,and account for 40%energy consumption and greenhouse gas emissions.Wuhan is the only sub-provincial city in Central China and,as the eighth largest economy nationwide,has experienced a notable increase in energy con-sumption.However,major knowledge gaps exist in understanding the nexus of economic development and carbon footprint and their drivers in Wuhan.Methods We studied Wuhan for the evolutionary characteristics of its carbon footprint(CF),the decoupling relation-ship between economic development and CF,and the essential drivers of CF.Based on the CF model,we quantified the dynamic trends of CF,carbon carrying capacity,carbon deficit,and carbon deficit pressure index from 2001 to 2020.We also adopted a decoupling model to clarify the coupled dynamics among total CF,its accounts,and eco-nomic development.We used the partial least squares method to analyze the influencing factors of Wuhan’s CF and determine the main drivers.Results The CF of Wuhan increased from 36.01 million t CO_(2)eq in 2001 to 70.07 million t CO_(2)eq in 2020,a growth rate of 94.61%,which was much faster than that of the carbon carrying capacity.The energy consumption account(84.15%)far exceeded other accounts,and was mostly contributed by raw coal,coke,and crude oil.The carbon deficit pressure index fluctuated in the range of 8.44-6.74%,indicating that Wuhan was in the relief zone and the mild enhancement zone during 2001-2020.Around the same time,Wuhan was in a transition stage between weak and strong CF decoupling and economic growth.The main driving factor of CF growth was the urban per capita residen-tial building area,while energy consumption per unit of GDP was responsible for the CF decline.Conclusions Our research highlights the interaction of urban ecological and economic systems,and that Wuhan’s CF changes were mainly affected by four factors:city size,economic development,social consumption,and technological p

关 键 词：Carbon footprint Economic development Decoupling analysis Partial least squares analysis MEGACITY 

分 类 号：F299.27[经济管理—国民经济] X321[环境科学与工程—环境工程]