College of Economics and Management, China University of Petroleum (East China), Qingdao, 266580, China.
Business School, Qingdao University of Techology, Qingdao, 266520, China.
Environ Sci Pollut Res Int. 2024 Oct;31(46):56719-56735. doi: 10.1007/s11356-023-27191-y. Epub 2023 May 2.
With intensified urbanization, cities are becoming increasingly important units for addressing air pollution issues. From the perspective of urban agglomeration (UA), in this paper, the influence of functional division on carbon dioxide (CO) emissions is studied. To explore the spillover effect within UA, a spatial Durbin model is built. The mediating effects of economic growth, industrial structure, and technological progress are examined using the parallel multiple mediation model. An empirical study is carried out on the Yangtze River Delta in China. The results suggest that: at the UA level, functional division and CO emissions follows a positive "U-shaped" curve relationship. The level of functional division is located on the left side of this curve. This implies that when the functional division of the Yangtze River Delta improves, current CO emission levels will decrease. Within the UA, improving the level of functional division will minimize CO emissions of adjacent cities, exerting a significant spillover effect. Functional division imposes a significantly negative influence on CO emissions. Moreover, economic growth, industrial structure, and technological progress all exert a significant mediating effect on the influencing mechanism. Functional division within the UA can also significantly reduce CO by optimizing these three paths.
随着城市化进程的加速，城市正成为解决空气污染问题的重要单位。本文从城市群视角出发，研究了功能分工对二氧化碳（CO）排放的影响。为了探索城市群内的溢出效应，构建了空间杜宾模型。利用并行多重中介模型检验了经济增长、产业结构和技术进步的中介效应。对中国长江三角洲进行了实证研究。结果表明：在城市群层面上，功能分工与 CO 排放呈正“U 型”曲线关系。功能分工的水平位于这条曲线的左侧。这意味着当长江三角洲的功能分工水平提高时，当前的 CO 排放水平将会降低。在城市群内，提高功能分工水平将最大限度地减少相邻城市的 CO 排放，产生显著的溢出效应。功能分工对 CO 排放具有显著的负向影响。此外，经济增长、产业结构和技术进步对影响机制都具有显著的中介效应。通过优化这三个路径，城市群内的功能分工也可以显著降低 CO。
