掌握碳源和碳汇时空演变规律,对促进区域低碳协调发展具有重要意义,提高碳减排和增加汇政策的科学性,实现“双碳”的目标。以长三角地区41个城市为研究对象,分析了2000-2020年长江三角洲地区碳源和碳汇时空演变特征,并进行了碳平衡区划。结果表明:①2000-2011年长江三角洲地区碳排放量增长较快,但2011年后仍有一定波动。2000年至2020年长江三角洲地区碳汇增长缓慢。碳排放和碳汇的区域差异显著,空间格局相对稳定。②长三角地区碳补偿率呈下降趋势,和碳生产率,能源利用效率,碳生态支撑能力不断增强。区域间差异是长三角地区碳补偿率的主要来源。碳补偿率和碳生态支持系数均呈现西高东低的空间格局,南高北低。“碳经济贡献系数高的地区集中在长三角地区的中南部地区,低碳经济贡献系数集中在安徽省。③基于碳经济贡献系数和碳生态支持系数,长三角地区的城市被划分为低碳维护区,经济发展地区,碳汇开发区,和综合优化领域。为促进区域低碳协调发展,实现"双碳"目标,对各类城市提出了建议。
Mastering the spatiotemporal evolution laws of carbon sources and sinks is of great significance to promote the coordinated development of regional low-carbon, improve the science of carbon reduction and sink increase policies, and realize the goal of \"double carbon.\" Taking 41 cities in the Yangtze River Delta Region as the research object, this study analyzed the spatiotemporal evolution characteristics of carbon sources and sinks in the Yangtze River Delta Region from 2000 to 2020 and conducted the carbon balance zoning. The results were as follows: ① The carbon emissions increased rapidly in the Yangtze River Delta Region from 2000 to 2011 but with some fluctuations after 2011. Carbon sinks increased slowly in the Yangtze River Delta Region from 2000 to 2020. The regional differences in carbon emissions and carbon sinks were significant, and the spatial pattern was relatively stable. ② The carbon compensation rate in the Yangtze River Delta Region showed a downward trend, and the carbon productivity, energy utilization efficiency, and carbon ecological support capacity were constantly enhanced. Interregional differences were the main source of carbon compensation rate in the Yangtze River Delta Region. Both the carbon compensation rate and carbon ecological support coefficient showed a spatial pattern of \"high in the west and low in the east, high in the south and low in the north.\" The areas with high carbon economy contributive coefficient were concentrated in the central and southern areas of the Yangtze River Delta regions, and the areas with low carbon economy contributive coefficient were concentrated in Anhui Province. ③ Based on the carbon economy contributive coefficient and the carbon ecological support coefficient, cities in the Yangtze River Delta Region were classified into low-carbon maintenance areas, economic development areas, carbon sink development areas, and comprehensive optimization areas. Recommendations were proposed for each category of cities in order to promote the coordinated development of regional low-carbon and realize the goal of \"double carbon\".