湖南省土地利用碳排放时空差异及其影响因素分析

Temporal and spatial differences of land use carbon emission and its influencing factors in Hunan Province

基于2000-2018年湖南省各类土地利用栅格数据,运用IPCC碳排放因子法、LMDI模型测算碳排放效应,土地利用的碳源、碳汇能力分析土地利用碳排放时空差异规律及五类影响因子与碳排放的关系。研究结果表明:(1)研究期内建设用地面积大幅度增加,水域、未利用地用地面积小幅度增加,耕地、林地、草地面积小幅度减少;(2)耕地、建设用地为主要碳源,林地、草地和水域为主要碳汇,碳排放强度在空间上大致呈现出由城市中心向城郊递减规律;(3)土地利用碳排放强度、土地利用结构效应、经济发展因子及人口因子对碳排放起推动作用,单位GDP土地利用强度对碳排放起抑制作用。

Based on all kinds of land use grid data of Hunan Province from 2000 to 2018,this paper used IPCC carbon emission factor method and LMDI model to calculate the carbon emission effect,and analyzed the temporal and spatial differences of land use carbon emission and the relationship between five influencing factors and carbon emission.The results showed that:(1)the area of construction land increased greatly,the area of water and unused land increased slightly,and the area of cultivated land,forest land and grassland decreased slightly;(2)cultivated land and construction land were the main carbon sources while forest land,grassland and water area were the main carbon sinks,and the intensity of carbon emission decreased from urban center to suburban area;(3)land use carbon emission intensity,land use structure effect,economic development factor and population factor promoted carbon emission,while land use intensity per unit GDP restrained carbon emission.