江西农业学报2023，Vol.35Issue(10)：158-168,11.DOI:10.19386/j.cnki.jxnyxb.2023.10.023
基于土地利用变化的长江中下游地区碳效率时空演变分析
Spatiotemporal Evolution of Carbon Efficiency in Middle and Lower Reaches of Yangtze River Based on Land Use Change
摘要
Abstract
Based on the land use and energy consumption data in the middle and lower reaches of the Yangtze River in 2005,2010,2015 and 2020,the carbon emissions were calculated with the city area as the basic unit,and the super-efficient SBM model was used to measure the urban carbon efficiency and study its temporal and spatial evolution characteristics.The results show that:(1)Land use changes frequently in the middle and lower reaches of the Yangtze River during the study period.The area of cultivated land,forest land and grassland show a decreasing trend,and the area of construction land,water area and unused land show an increasing trend.Carbon emissions mainly come from construction land,accounting for more than 95%of carbon emissions.The overall spatial distribution pattern is characterized by"more in the east and less in the west,and more in the north and less in the south".(2)The mean carbon efficiency in the middle and lower reaches of the Yangtze River showed a trend of first decreasing and then increasing with 2015 as the inflection point,but the distribution interval of carbon efficiency value was shrinking and the difference between cities was narrowing.The more efficient cities are mainly concentrated in southern Jiangsu,northern Zhejiang and Shanghai,while the less efficient cities are mainly concentrated in bordering Anhui,Jiangxi and Hubei provinces,showing a spatial feature of"lower in central China and higher in eastern and western China".(3)Through the global spatial autocorrelation analysis,the carbon efficiency of the city has a significant positive correlation,and the local spatial autocorrelation analysis shows that high aggregation types are mainly distributed in southern Jiangsu and northern Zhejiang,while low aggregation types were mainly distributed in Anhui,Jiangxi and northern Jiangsu.In general,the local LISA pattern of carbon efficiency in the middle and lower reaches of the Yangtze River has become a spatial feature of"large dispersion and small aggregation".关键词
土地利用/碳排放/碳效率/超效率SBM模型/时空演变Key words
Land use/Carbon emission/Carbon efficiency/Super-efficient SBM model/Spatiotemporal evolution分类
天文与地球科学引用本文复制引用
蔡鑫,叶长盛,顾茉莉,张海铃..基于土地利用变化的长江中下游地区碳效率时空演变分析[J].江西农业学报,2023,35(10):158-168,11.基金项目
国家自然科学基金项目(42061041). （42061041）
