成渝城市群碳平衡空间分异与优化对策

Spatial Differentiation of Carbon Balance and Optimization Countermeasures in Chengdu-Chongqing Urban Agglomeration

探究城市群尺度碳平衡空间分异,为统筹城市群区域绿色协调发展提供科学支撑。以成渝城市群42个城市为研究对象,核算2005、2010、2015、2020年各城市的碳平衡经济贡献系数和生态支持系数,利用二阶聚类法进行碳平衡分区。区域生态碳平衡呈“先下降后上升”趋势,空间上呈现“中间低,周围高”的特征;经济碳平衡呈‘先下降后上升’趋势,空间上呈现“西高东低”的特征;根据聚类结果将42个城市划分为碳源优化区域、碳汇优化区域、碳平衡经济补偿区及碳平衡生态补偿区,提出相应的碳平衡优化对策。成渝城市群碳平衡存在明显的空间分异特征,四川与重庆碳平衡经济贡献系数和碳平衡生态贡献系数数值具有对立关系,成渝之间还存在生态、经济壁垒。

Investigating the spatial differentiation of carbon balance at the urban cluster scale can provide scientific basis for the coordinated and sustainable development of urban cluster regions;Utilizing 42 cities within the Chengdu-Chongqing urban agglomeration as the research area,this study examined the economic contribution coefficients and ecological support coefficients of carbon balance for each city for 2005,2010,2015,and 2020.Furthermore,carbon balance zoning was conducted by employing the second-order clustering method;The regional ecological carbon balance exhibited an initial decline followed by an increase,displaying a spatial pattern of lower values in central areas and higher values in peripheral regions.On the other hand,the economic carbon balance followed a similar pattern of decreasing and then increasing,with the spatial characteristics of higher values in the western areas and lower values in the eastern areas.Based on the outcomes of clustering analysis,the 42 cities were categorized into four zones:carbon source optimization area,carbon sink optimization area,carbon balance economic compensation area,and carbon balance ecological compensation area.This classification formed the foundation for suggesting diverse optimization measures for carbon balance within these zones;The carbon balance within the Chengdu-Chongqing urban agglomeration exhibited distinct spatial differentiation features,compounded by existing ecological and economic barriers between Chengdu and Chongqing cities.