基于土地利用变化的江苏省碳排放时空差异与碳平衡分区

Spatial-temporal differences of carbon emissions and carbon balance zoning in Jiangsu based on land use change

以江苏省13个设区市为例,基于碳排放(CE)和碳吸收估算方法,分析2005—2020年江苏省市域碳收支和碳补偿率的时空演变特征,随后引入环境基尼系数(EGC)从经济和生态两个角度分析空间碳平衡特征。结果表明:2005—2020年,江苏省土地利用碳排放从14210.005×10^(4)t增至23015.325×10^(4)t,碳吸收3039.383×10^(4)t波动上升至3628.703×10^(4)t,总体表现为碳源;13个设区市的碳补偿率整体呈现下降趋势,碳排放量与经济发展水平处于比较协调状态,与其人口聚集协调性较高;根据碳平衡分析,将13个设区市划分为碳汇功能区、低碳保持区、经济发展区、碳强度控制区、高碳优化区5类,并建议前两个分区充分发挥生态优势,着重推进生态产品价值变现;其余分区优先推动产业低碳转型,能源绿色化发展。

With a case study of 13 cities divided into districts in Jiangsu,China,the CE,carbon absorption and carbon compensation rate were calculated and analyzed based on the(CE)and carbon sequestration estimation methods.Subsequently,the Environmental Gini Coefficient(EGC)was utilized to evaluate the spatial carbon balance characteristics from the economic and ecological perspectives.The results showed that from 2005 to 2020,the CE of LULC in Jiangsu increased from 1421,000,500 tons to 230,153,250 tons,and the carbon absorption fluctuated from 30,393,830 tons to 36,287,030 tons,indicating that Jiangsu Province is the overall carbon source.The carbon emissions and economic development level are in a relatively coordinated state,and the coordination with population aggregation is relatively high.Based on carbon balance analysis,the 13 districts are divided into five types:carbon sink function area,low-carbon conservation area,economic development area,carbon intensity control area,and highcarbon optimization area.It is recommended that the first two zones give full play to ecological advantages and focus on promoting the realization of ecological product value.Other zones should prioritize promoting the low-carbon transformation of industries and the green development of energy.