基于碳转移矩阵的土地利用碳排放效应研究——以广西北部湾经济区为例

The Effects of Land Use Carbon Emission Based on the Carbon Transfer Matrix—A Case of Guangxi Beibu Gulf Economic Zone

研究土地利用类型转变所引起的碳排放效应,为调整土地利用结构,实现区域土地低碳利用提供决策基础。运用Arc GIS软件对北部湾经济区1990、2000及2010年3个时期的遥感影像进行处理分析,得出土地利用转移矩阵,进而核算土地利用类型转变的碳排放转移矩阵。结果表明,在整个研究期内,因地类转移造成总净减少的碳排放量达987 550.37 t,经研究发现碳汇地类及未利用地向碳源地类转变、碳源地类间由低排放向高排放地类的转变会导致区域碳排放量明显增加。碳源地类向碳汇地类的转变而减少的碳排放量为631 690.25 t,碳减缓能力与转向地类的碳汇/碳排放能力有一定关系。针对新兴发展区域的土地利用趋势,从低碳经济的发展角度提出了相应的优化措施。

The studies was able to adjust land use structure and to provide a basis for decisions to achieve land use carbon using carbon emissions caused by the effects of the type of change. Based on the TM images of 1990,2000 and 2010,the land use type conversion was gained, and the carbon transfer matrix was calculated. The results indicated that,during the study period,the resulting from class to transfer a total net reduction in carbon emissions was 987 550.37 t,and it was found that the transition from the carbon sinks in class and unutilized land to carbon sources,the carbon sources from low to high emissions could lead to the regional carbon emission with a significant increase. Simultaneously,although the transmission from carbon sources to carbon sinks reduce carbon emissions was 631 690.25 t,and the changes between carbon sinks had some contribution to slow down carbon emissions,there was a certain relationship between the mitigation of carbon and carbon sink /emission capability. Aiming to the land-use trend in the emerging development area,the corresponding optimization measures from the perspective of the development of low-carbon economy was put forward.