内蒙古草地生态系统碳源/汇时空格局及其与气候因子的关系（英文）

编号 zgly0001584385

文献类型 期刊论文

文献题名 内蒙古草地生态系统碳源/汇时空格局及其与气候因子的关系（英文）

作者 戴尔阜  黄宇  吴卓  赵东升 

作者单位 KeyLaboratoryofLandSurfacePatternandSimulation  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  SchoolofPlanning  FacultyofEnvironment  UniversityofWaterloo  UniversityofChineseAcademyofSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2016年03期

年份 2016 

分类号 S812 

关键词 InnerMongolia  grasslandecosystem  NPP  NEP  carbonsource  carbonsink 

文摘内容 Global climate change has become a major concern worldwide. The spatio-temporal characteristics of net ecosystem productivity(NEP), which represents carbon sequestration capacity and directly describes the qualitative and quantitative characteristics of carbon sources/sinks(C sources/sinks), are crucial for increasing C sinks and reducing C sources. In this study, field sampling data, remote sensing data, and ground meteorological observation data were used to estimate the net primary productivity(NPP) in the Inner Mongolia grassland ecosystem(IMGE) from 2001 to 2012 using a light use efficiency model. The spatio-temporal distribution of the NEP in the IMGE was then determined by estimating the NPP and soil respiration from 2001 to 2012. This research also investigated the response of the NPP and NEP to the main climatic variables at the spatial and temporal scales from 2001 to 2012. The results showed that most of the grassland area in Inner Mongolia has functioned as a C sink since 2001 and that the annual carbon sequestration rate amounts to 0.046 Pg C/a. The total net C sink of the IMGE over the 12-year research period reached 0.557 Pg C. The carbon sink area accounted for 60.28% of the total grassland area and the sequestered 0.692 Pg C, whereas the C source area accounted for 39.72% of the total grassland area and released 0.135 Pg C. The NPP and NEP of the IMGE were more significantly correlated with precipitation than with temperature, showing great potential for C sequestration.