基于土地利用变化的重庆碳排放时空格局研究

Study on Temporal and Spatial Patterns of Carbon Emission in Chongqing Based on Land Use Change

基于重庆2000年、2005年、2010年、2015年、2018年的土地利用类型数据及能源消耗统计数据,测算其土地利用碳排放量,并运用地理探测器探索土地利用碳排放空间分异的影响因素。研究发现,(1)重庆的土地利用碳排放量由2000年的1 908.14×104吨增至2015年的4 546.76×104吨再降至2018年的4 187.21×104吨,呈现先上升后下降的态势,其中建设用地、林地分别对碳源、碳汇的影响较大。(2)重庆土地利用碳排放存在一定的空间差异,渝东南、渝东北的土地利用碳排放量偏低,主城都市区土地利用碳排放量偏高,其中主城新区的土地利用碳排放量整体有所上升。(3)重庆土地利用碳排放与经济增长之间由弱脱钩逐渐转变为强脱钩。(4)人口规模、经济发展水平、城镇化水平、产业结构均对土地利用碳排放空间分异有影响,其中人口规模、产业结构的影响力有所减弱,经济发展水平、城镇化水平的影响力有所增加。

Based on the land use type data and energy consumption statistics of Chongqing in 2000,2005,2010,2015 and 2018,this paper calculate its land use carbon emissions,and use geographic detectors to explore the influencing factors of spatial differentiation of land use carbon emissions.The research found that,(1)Chongqing’s land use carbon emissions has increased from 19.0814 million tons in 2000 to 45.4676 million tons in 2015,and then decreased to 41.8721 million tons in 2018,showing a trend of first increasing and then decreasing.Among them,construction land and forest land have the great impact on carbon source and carbon sink respectively.(2)There are spatial differences in carbon emissions from land use in Chongqing. The carbon emissions from land use in Southeast and Northeast Chongqing are low, and the carbon emissions from land use in metropolitan areas are high,and the carbon emissions from land use in new urban areas have increased on the whole.(3) The relationship between land use carbon emissions and economic growth has changed from weak decoupling to strong decoupling.(4) Population size, economic development level, urbanization level and industrial structure all have the impact on the spatial differentiation of land use carbon emissions. Among them, the influence of population size and industrial structure has weakened, and the influence of economic development level and urbanization level has increased.