School of Public Administration, Hohai University, Nanjing 211100, China.
Department of Land Planning, China Land Surveying and Planning Institute, Beijing 100035, China.
Int J Environ Res Public Health. 2023 Feb 23;20(5):4023. doi: 10.3390/ijerph20054023.
With ever-increasing urbanization and industrialization in developing countries, the challenge posed by carbon dioxide emissions (CDEs) has become a hot topic of concern in the realm of sustainable development from a socioeconomic perspective. However, previous studies have only been conducted at macro and meso scales, including at the global, country, and urban levels, and few researchers have delved into the territorial space of urban areas due to a lack of high-precision data. To address this deficiency, we established a theoretical framework to explore the spatial zoning of CDEs based on the newly emerging China high-resolution emission gridded data (CHRED). This study's innovativeness lies in its provision of a step-by-step process for spatial matching of CDEs based on CHRED in the framework and the construction of square layers to reveal spatial heterogeneity of CDEs at the intra-city level. Taking Nanjing City as the case study area, our findings indicated that CDEs intensity (CDEI) shows an inverted "U-shaped" trend that first increased and then decreased, and finally stabilized from the center to the periphery of the city. With further urbanization and industrialization, the energy consumption sector was found to be the largest contributor to CDEs in Nanjing, and the expanding carbon source zonings will therefore shrink the existing carbon sink zonings. Collectively, these results can provide a scientific reference point to realize China's "dual carbon" target from the perspective of spatial layout optimization.
随着发展中国家城市化和工业化进程的不断推进，二氧化碳排放（CDEs）所带来的挑战已成为从社会经济角度出发，可持续发展领域内备受关注的热点议题。然而，由于缺乏高精度数据，先前的研究仅在宏观和中观尺度上进行，包括在全球、国家和城市层面上，很少有研究人员深入探讨城市地区的地域空间。为了弥补这一不足，我们基于新兴的中国高分辨率排放网格化数据（CHRED），建立了一个理论框架，用以探索 CDEs 的空间分区。本研究的创新性在于，它为基于 CHRED 的 CDEs 提供了一个空间匹配的分步过程，在框架内构建正方形层以揭示城市内部 CDEs 的空间异质性。以南京市为例，研究结果表明，CDEs 强度（CDEI）呈先增加后减少再稳定的倒“U 型”趋势，从城市中心到外围逐渐减弱。随着城市化和工业化的进一步推进，能源消耗部门成为南京市 CDEs 的最大贡献者，不断扩大的碳源分区将缩小现有的碳汇分区。总的来说，这些结果可以为从空间布局优化的角度实现中国的“双碳”目标提供科学参考。
