通过计算2000—2019年中国336个地级及以上城市碳排放和碳汇数据,构建城市碳足迹压力指数,从七大地区和城市规模的视角分析其差异、极化和空间集聚特征。研究发现:城市总体碳足迹压力呈增长态势,高值集中在华南、华东和华北地区,低值集中在西南地区,城市碳足迹压力与城市规模成正比。城市碳足迹压力总体差异水平较大,子群间净差异是总体差异的主要来源,主要集中在华南—西南地区。从城市规模来看,碳足迹压力差异主要集中在城市规模差异较大的组合。城市碳足迹压力极化水平下降明显,主要由认同度下降导致。城市碳足迹压力空间集聚类型主要表现为高—高集聚和低—低集聚,前者集中在华南、华东和华北地区,后者集中在西南地区。一线和新一线城市以高—高集聚为主,低—低集聚城市数量与城市规模成反比。
Based on the calculation of carbon emission and carbon sink data of 336 prefecture-level and above cities in China from 2000-2019, this paper constructs the city carbon footprint pressure index and analyzes the differences, polarization and spatial agglomeration characteristics from the perspective of seven regions and city size. The results are as follows: the carbon footprint pressure of Chinese cities is increasing. The high values are concentrated in South, East and North China, and the low values are concentrated in Southwest China. The carbon footprint pressure of cities is positively proportional to city size. The overall difference level is large, and the net difference between subgroups is the main source of overall difference, mainly concentrated in South China-Soutwest China, as well as the combination with large difference in city scale. The level of polarization decreases significantly, mainly caused by the decrease of identity. The main manifestations are high-high and low-low agglomeration, with the former concentrated in South, East and North China, and the latter in Southwest China. First-tier and new first-tier cities are dominated by high-high agglomeration, and the number of low-low agglomeration cities is inversely proportional to city size.
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