摘要
通过获取5期土地利用遥感监测数据,利用GIS技术,采用土地利用转移矩阵、空间趋势分析、点密度及热点分析等方法,研究2000—2018年长三角地区中心区的土地利用转移的碳排放强度及其空间特征。结果表明:19年间长三角土地利用转移空间上,北部及沿海地区变化以建设用地转入为主,西南部以林地、草地转入为主,耕地转入量集中在西北地区,且原地保持率逐渐变低;土地利用变化过程中,碳排放强度具有明显的差异性;耕地具有较高的碳排放强度,林地具有较强的碳吸收强度;土地利用碳排放强度分布方向具有集聚向内陆转移,空间发展“东—西”方向扩张强度大于“南—北”的特征;空间分布具有“南高北低性”“南部分散性”两个时空特征。总体来看,碳汇与碳源用地的结构调整,是实现碳平衡及碳峰值的有效手段;城市发展水平与碳排放强度的集中度有一定的相关性。因此,经济较为发达的城市应保持较高的土地集约节约利用,以降低碳排放强度集中度;受辐射较为明显的地区,应控制新增碳源用地,挖掘潜在碳汇用地,实现区域内的碳平衡;生态资源良好、碳汇用地规模较大的地区,应优化土地利用结构布局,在保证碳汇功能的基础上实现高质量发展。
By acquiring 5 phases of land use remote sensing monitoring data,and GIS technology,and methods such as land use transfer matrix,spatial trend analysis,point density and hotspot analysis,a study was conducted on the carbon emission intensity and spatial characteristics of land use transfer in the central area of the Yangtze River Delta from 2000 to 2018.The results show that:(1)In terms of land use transfer space in the Yangtze River Delta from 2000 to 2018,the changes in the northern and coastal areas were dominated by the transfer of construction land,the southwest was dominated by the transfer of woodland and grassland,and the transfer of cultivated land was concentrated in the northwest.And the in-situ retention rate was gradually decreasing;(2)In the process of land use change in the central area of the Yangtze River Delta in 19 years,the carbon emission intensity had obvious differences.Cultivated land had a high carbon emission intensity,and forest land had a strong carbon absorption intensity.(3)From 2000 to 2018,the distribution direction of land use carbon emission intensity in the central area of the Yangtze River Delta had the characteristics of agglomeration to inland transfer,and the expansion intensity in the“East-West”direction of spatial development was greater than that of“South-North”;the spatial distribution had the characteristics of“being higher in the South and lower in the North”and dispersion in the south.In general,the structural adjustment of carbon sinks and carbon source land is an effective means to achieve carbon balance and carbon peak;there is a certain correlation between the level of urban development and the concentration of carbon emission intensity.Therefore,cities with more developed economies should maintain a high level of intensive and economical use of land to reduce the concentration of carbon emission intensity;areas with more obvious radiation should control new carbon source land,tap potential carbon sink land,and achieve regional carbon balance;areas with good ecological resources and large-scale carbon sink land should optimize the layout of land use structure to achieve high-quality development on the basis of ensuring the function of carbon sinks.
作者
秦岩
於冉
於忠祥
陆盼盼
李兰兰
桂政
宋中俊
QIN Yan;YU Ran;YU Zhongxiang;LU Panpan;LI Lanlan;GUI Zheng;SONG Zhongjun(College of Economics and Management,Anhui Agricultural University,Hefei 230036,China)
出处
《河南农业大学学报》
CAS
CSCD
2021年第1期132-140,共9页
Journal of Henan Agricultural University
基金
安徽省哲学社会科学规划项目(AHSKQ2018D16)。
关键词
土地利用碳排放强度
空间格局
长江三角洲
land use carbon emission intensity
spatial pattern
Yangtze River Delta
