| 成渝地区双城经济圈土地利用碳排放时空演变及差异化碳补偿 |
| 摘要点击 966 全文点击 21 投稿时间：2025-07-05 修订日期：2025-10-02 |
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| 中文关键词 土地利用 碳排放 碳补偿 时空差异 成渝地区双城经济圈（CCEC） |
| 英文关键词 land use carbon emissions carbon compensation spatial-temporal variation Chengdu-Chongqing Economic Circle （CCEC） |
| DOI 10.13227/j.hjkx.202507068 |
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| 中文摘要 |
| 厘清土地利用碳排放的时空差异及其碳补偿机制，对于优化区域低碳发展路径和实现碳达峰、碳中和目标具有重要意义. 以成渝地区双城经济圈144个县（市、区）为研究对象，基于2000~2022年土地利用、农业生产、能源消耗及社会经济数据，构建县域尺度的碳收支核算模型与碳补偿测算框架，系统分析土地利用碳排放与碳吸收的时空演变特征，并定量评估碳补偿的空间分异格局及其与土地利用结构、经济发展水平的耦合关系. 结果表明： ① 研究区碳排放总量由2000年的4.95×107 t 快速攀升至2010年的峰值1.20×108 t，随后逐步降至2022年的1.04×108 t. 碳排放高值区集中于成都、重庆主城区及周边核心区域，而秦巴山区和川西生态保护区则表现出较强的碳汇功能，区域总碳汇量在2022年达到5.79×107 t，较2000年增加9.96×105 t. ② 碳补偿格局呈现“核心-边缘”梯度分异，核心城市因建设用地扩张排放强度较高，武侯区2022年碳排放量达5.14×106t，成为主要支付主体；而生态与农业优势区则凭借较强的固碳能力获得补偿，其中宣汉县碳汇量达1.6×106 t，补偿收益居前. ③ 土地利用碳排放、经济发展与碳补偿之间存在显著空间耦合关系. 尽管部分经济发达区碳排放强度下降，但绝对排放量依然偏高；相较之下，生态功能区因人类活动强度较低、土地利用方式稳定而保持较强碳汇潜力，导致区域碳排放责任与碳补偿能力之间存在明显错配. 研究结论可为成渝地区双城经济圈精准实施碳减排政策与构建差异化碳补偿机制提供科学支撑. |
| 英文摘要 |
| Understanding the spatial-temporal heterogeneity of land-use carbon emissions and corresponding carbon compensation mechanisms is essential for optimizing regional low-carbon development pathways and achieving carbon peak and neutrality targets. This study investigates 144 counties within the Chengdu-Chongqing Economic Circle （CCEC） during 2000-2022 by establishing a county-level carbon accounting framework and a compensation valuation model based on land use， agricultural production， energy consumption， and socioeconomic data. The results indicate that： ① Total carbon emissions increased sharply from 4.95×107 t in 2000 to a peak of 1.20×108 t in 2010 before declining to 1.04×108 t in 2022. High-emission zones were concentrated in the core areas of Chengdu and Chongqing， while the Qinba Mountains and western Sichuan served as major carbon sinks. Total carbon sequestration reached 5.79×107 t in 2022， representing an increase of 9.96×105 t compared with that in 2000. ② Carbon compensation exhibited a pronounced “core-periphery” gradient： Urban cores， exemplified by Wuhou District with emissions of 5.14×106 t in 2022， were the primary compensation payers， whereas ecological and agricultural regions benefitted from strong sequestration capacity. Xuanhan County， with a sequestration volume of 1.6×106 t， ranked among the leading compensation recipients. ③ A strong spatial coupling existed between carbon emissions， economic development， and carbon compensation. Although carbon intensity declined in economically developed areas， absolute emissions remained high， whereas ecological function zones maintained stable carbon sink capacities owing to low human disturbance and relatively stable land use. This imbalance intensified the spatial mismatch between emission responsibilities and compensation capacities. The findings provide robust scientific evidence for implementing targeted emission reduction policies and refining differentiated carbon compensation mechanisms in the CCEC. |
