2001～2010年中国陆地生态系统碳收支的初步评估  

Primary estimation of Chinese terrestrial carbon sequestration during 2001–2010

作　　者：王秋凤[1] 郑涵[1,2] 朱先进[1] 于贵瑞[1] 

机构地区：[1]中国科学院地理科学与资源研究所,生态系统网络观测与模拟重点实验室,CERN综合研究中心,北京100101 [2]中国科学院大学,北京100049

出　　处：《科学通报》2015年第10期962-962,共1页Chinese Science Bulletin

摘　　要：定量评估陆地生态系统的碳收支现状是实施区域碳汇管理、减缓气候变化行动计划的基础.因此,定量研究全球以及不同国别的陆地生态系统生产力及其在各种碳库或生态学过程中的利用与分配规律,评估陆地生态系统碳源/汇强度的空间格局和动态变化,不仅是生态系统与全球变化科学研究的重要内容,也是履行《联合国气候变化框架公约》、增强全球和国别温室气体管理的重大科技需求.Quantifying the carbon budgets of terrestrial ecosystems is the foundation on which to understand the role of these ecosystems as carbon sinks and to mitigate global climate change. Through a re-examination of the conceptual framework of ecosystem productivity and the integration of multi-source data, we assumed that the entire terrestrial ecosystems in China to be a large-scale regional biome-society system. We approximated the carbon fluxes of key natural and anthropogenic processes at a regional scale, including fluxes of emissions from reactive carbon and creature ingestion, and fluxes of emissions from anthropogenic and natural disturbances. The gross primary productivity, ecosystem respiration and net ecosystem productivity(NEP) in China were 7.78, 5.89 and1.89 Pg C a-1, respectively, during the period from 2001 to2010. After accounting for the consumption of reactive carbon and creature ingestion(0.078 Pg C a-1), fires(0.002 Pg C a-1), water erosion(0.038 Pg C a-1) and agricultural and forestry utilization(0.806 Pg C a-1), the final carbon sink in China was about 0.966 Pg C a-1; this wasconsidered as the climate-based potential terrestrial ecosystem carbon sink for the current climate conditions in China. The carbon emissions caused by anthropogenic disturbances accounted for more than 42 % of the NEP,which indicated that humans can play an important role in increasing terrestrial carbon sequestration and mitigating global climate change. This role can be fulfilled by reducing the carbon emissions caused by human activities and by prolonging the residence time of fixed organic carbon in the large-scale regional biome-society system through the improvement of ecosystem management.

关 键 词：陆地生态系统 定量评估 碳收支 《联合国气候变化框架公约》 生态系统生产力 中国 气体管理 生态学过程 

分 类 号：X826[环境科学与工程—环境工程]