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<p>The structure of urban environments significantly impacts the planning, construction, and management of cities, particularly in understanding its influence on land-space carbon sink conflicts (LSCSC). This understanding is essential for achieving Sustainable development goals, particularly in regions with high ecological sensitivity. This study utilizes natural, socioeconomic, and Land use data from 142 districts and counties in the Chengdu-Chongqing economic circle (CCEC) for the years 1990, 2000, 2010, and 2020 to develop an LSCSC assessment model. A geographically and temporally weighted regression (GTWR) model was employed to investigate the relationship between LSCSC and four urban forms: fragmentation, shape, size, and compactness. The main findings include: from 1990 to 2020, patch density (PD) and interspersion juxtaposition index (IJI) increased, total edge (TE) showed a “sharp increase–stabilization” trend, and the largest patch index (LPI) fluctuated upwards. Spatial carbon emission pressure (SCEP), spatial carbon sequestration capacity (SCSC), and spatial instability (SI) also generally increased, with LSCSC showing a “sharp increase–gradual mitigation” trend. The dynamic interaction between urban form and LSCSC exhibited non-stationary characteristics in both temporal and spatial dimensions. PD and LPI were significantly positively correlated with LSCSC, while TE and IJI showed significant negative correlations. The study results indicate that regular and compact urban forms are highly effective in alleviating LSCSC. These insights help optimize urban form and mitigate LSCSC, offering valuable theoretical and practical significance for sustainable development in similar ecological conservation areas worldwide.</p>

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The impact of urban form on land space carbon sink conflicts: A case study of the Chengdu-Chongqing economic circle in China

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Fei Yang,
  • Xinya Tian,
  • Tian Liang,
  • Qing He,
  • Yanli Mao,
  • Yinyin Chen

摘要

The structure of urban environments significantly impacts the planning, construction, and management of cities, particularly in understanding its influence on land-space carbon sink conflicts (LSCSC). This understanding is essential for achieving Sustainable development goals, particularly in regions with high ecological sensitivity. This study utilizes natural, socioeconomic, and Land use data from 142 districts and counties in the Chengdu-Chongqing economic circle (CCEC) for the years 1990, 2000, 2010, and 2020 to develop an LSCSC assessment model. A geographically and temporally weighted regression (GTWR) model was employed to investigate the relationship between LSCSC and four urban forms: fragmentation, shape, size, and compactness. The main findings include: from 1990 to 2020, patch density (PD) and interspersion juxtaposition index (IJI) increased, total edge (TE) showed a “sharp increase–stabilization” trend, and the largest patch index (LPI) fluctuated upwards. Spatial carbon emission pressure (SCEP), spatial carbon sequestration capacity (SCSC), and spatial instability (SI) also generally increased, with LSCSC showing a “sharp increase–gradual mitigation” trend. The dynamic interaction between urban form and LSCSC exhibited non-stationary characteristics in both temporal and spatial dimensions. PD and LPI were significantly positively correlated with LSCSC, while TE and IJI showed significant negative correlations. The study results indicate that regular and compact urban forms are highly effective in alleviating LSCSC. These insights help optimize urban form and mitigate LSCSC, offering valuable theoretical and practical significance for sustainable development in similar ecological conservation areas worldwide.