Zhang Yuxiang,Chen Maolin,Guan Dongjie,et al.Spatiotemporal pattern evolution and influencing factors of land-use carbon emission efficiency in upper reaches of Yangtze River[J].Research of Soil and Water Conservation,2025,32(05):275-287.[doi:10.13869/j.cnki.rswc.2025.05.040]
长江上游土地利用碳排放效率时空格局演化及影响因素
- Title:
- Spatiotemporal pattern evolution and influencing factors of land-use carbon emission efficiency in upper reaches of Yangtze River
- 文章编号:
- 1005-3409（2025）05-0275-13
- Keywords:
- land use; carbon emission efficiency; super-efficiency SBM model; optimal parameter geodetector; upper reaches of the Yangtze River
- 分类号:
- F301.2； X321
- 文献标志码:
- A
- 摘要:
- [目的] 揭示土地利用碳排放效率时空格局演化规律及影响机制，为长江上游促进区域协同减排和优化国土空间格局提供借鉴参考。[方法] 以长江上游地区为研究对象，运用非期望产出超效率SBM模型和最优参数地理探测器识别土地利用碳排放效率的时空格局演化特征并探究其影响因素及机制。[结果]（1）长江上游土地利用净碳排放量时空差异显著，在时间上呈现持续增长的趋势，但净碳排放增速存在明显下降趋势；在空间上呈现“中部东南高、西北低”的分布格局。（2）长江上游土地利用碳排放效率先下降后上升，效率平均值分别为0.68，0.57，0.60；在空间上呈现出“大聚集小散点—块状聚集—碎块分散”的演化特征，高效率区主要集中在成渝城市群，低效率区分布在川西等外围城市。（3）长江上游土地利用碳排放效率影响最高的因素分别为人口密度、政府干预和对外开放。各因子交互影响均大于单个因子的影响且影响作用呈逐年增高的趋势，人口密度、对外开放和科技创新的协同影响作用最显著。[结论] 长江上游土地利用碳排放效率差异虽有减弱但仍然处于两极分化格局，各城市应突破区域行政隔阂，优化产业结构，建立横向碳补偿机制来推进碳排放效率提升。
- Abstract:
- [Objective] To elucidate the spatiotemporal patterns and influencing mechanisms of land-use carbon emission efficiency, thereby providing a reference for promoting regional collaborative emission reduction and optimizing the spatial structure in the upper reaches of the Yangtze River. [Methods] Taking the upper Yangtze River as the study area, the SBM model of undesirable output super-efficiency and the optimal parameter geographic detector with optimal parameters were applied to identify the spatiotemporal pattern evolution characteristics of land-use carbon emission efficiency, and to explore its influencing factors and mechanisms. [Results](1) There were significant spatiotemporal differences in net carbon emissions from land use in the upper reaches of the Yangtze River, showing a continuous upward trend over time, but with a clear downward trend in the growth rate of net carbon emissions. Spatially, it exhibited a distribution pattern of ‘high in the central-southeastern part and low in the northwestern part’.(2) The land-use carbon emission efficiency in the upper reaches of the Yangtze River decreased and then increased, with average efficiencies of 0.68, 0.57, and 0.60, respectively. Spatially, it presented an evolutionary characteristic of‘large clusters and small scattered points— block-like clusters—fragmented dispersion’. High-efficiency zones were mainly concentrated in the Chengdu- Chongqing urban agglomeration, while low-efficiency zones were distributed in peripheral cities such as western Sichuan.(3) The factors with the highest impact on land-use carbon emission efficiency in the upper reaches of the Yangtze River included population density, government intervention, and openness to the outside world. The interactive effects of these factors were greater than those of individual factors. Moreover, the impact showed a trend of increasing year by year, with the most significant synergistic effects from population density, openness to the outside world, and scientific and technological innovation. [Conclusion] Although the differences in land-use carbon emission efficiency in the upper reaches of the Yangtze River have weakened, they still remain in a bipolar pattern. Cities should break through regional administrative barriers, optimize industrial structure, and establish horizontal carbon compensation mechanisms to promote carbon emission efficiency.
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备注/Memo
收稿日期：2024-12-10 修回日期：2024-12-31 接受日期：2025-01-13
资助项目：中国地质调查局地质调查项目（DD20230519；DD20230612；DD20243130）
第一作者：张喻翔（1998—），男，甘肃陇南人，硕士，研究方向为土地利用与生态可持续科学等。E-mail：zhangyxgiser@163.com
通信作者：陈茂林（1997—），女，四川宜宾人，硕士，研究方向为国土生态安全与生态修复等。E-mail：18483282212@163.com