功能区土地利用碳收支空间分异及碳补偿分区——以武汉城市圈为例

开展功能区土地利用碳收支评估并构建碳补偿分区优化框架,对于制定适应各功能区低碳策略、指导补偿额度流向、推动区域协调发展具有重要现实意义。以武汉城市圈县域为基本单元,在分析主体功能区划下土地利用碳收支空间分异特征的基础上,借助标准显示性比较优势指数法、SOM-K-means模型、二维关联矩阵等方法,对武汉城市圈进行了碳补偿类型区划分及优化。结果表明：武汉城市圈各县域土地利用碳排放总量地区差异显著,呈现“西高东低,中心最高”空间分布格局;主体功能区划下土地利用碳排放、碳吸收均具有明显空间分异特征,碳吸收与碳排放呈现出一定程度的相对空间分布趋势;武汉城市圈共有16个碳补偿支付区、11个碳补偿获补区以及12个碳补偿平衡区;结合主体功能区规划战略目标,最终形成7类碳补偿空间优化区,并对每一类型区提出了相应的低碳发展方向及策略。

Spatial variation of land use carbon budget and carbon compensation zoning in functional areas:A case study of Wuhan Urban Agglomeration

It is of great practical significance to carry out the assessment of land use carbon budget in functional areas and construct a carbon offset zoning optimization framework to formulate low carbon strategies for each functional area, specify compensation flows, and promote coordinated regional development. When taking Wuhan Urban Agglomeration as the basic analysis unit, this paper analyzes the spatial differentiation characteristics of land use carbon budget under the MFOZ, and the classification and conducts optimization of carbon compensation types in Wuhan Urban Agglomeration with the help of some methods, such as the Normalized Revealed Comparative Advantage Index method, the SOM-K-means model, and the two-dimensional correlation matrix. The results show that there are significant regional differences in the total amount of carbon emissions in different counties of Wuhan Urban Agglomeration, and display the spatial distribution characteristics that the total amount of carbon emissions is lower in the west and higher in the east, and the highest in the center. The land use carbon emission and carbon absorption in the MFOZ have obvious spatial differentiation characteristics, which shows a certain degree of relative spatial distribution trend. Wuhan Urban Agglomeration has been divided into 16 carbon compensation payment areas, 11 carbon compensation obtaining areas and 12 carbon compensation balance areas. In combination with the strategic objectives of the MFOZ, 7 types of carbon offset space optimization areas are eventually formed, and corresponding low-carbon development directions and strategies are proposed for each type of area.