摘要
泥炭地是全球重要的有机碳库,在全球碳循环和气候变化中起着重要作用。在已有的对全球和各大洲泥炭地面积和泥炭储量估算结果的基础上,结合有机碳含量的数据,估算世界、各大洲和主要国家的泥炭地有机碳储量,得到如下结果:世界泥炭地有机碳储量为2 381.34×108t。各大洲泥炭地有机碳储量分布不均,北美洲最为丰富,储量为1 098.64×108t,占总储量的46.14%;其次是欧洲和亚洲,分别占总储量的27.41%和22.89%。由于各国对泥炭地的界定不一致,缺乏泥炭层厚度、泥炭容重等重要指标的基础数据,或者由于这些指标统计核算的口径不同,导致很难对泥炭地有机碳储量进行准确估算。最后分析了影响泥炭地有机碳储量动态变化的主要影响因素,以期为泥炭资源可持续利用和保护泥炭地碳储存功能提供科学依据。
Peatlands are globally important organic carbon pools, and play a key role in the global carbon cycle and climate change. Based on the existing estimates of peatland area and peat reserves in the world and in the continents, combining with the data of organic carbon content, carbon storage in peatland in the world, in the continents and in some main countries was estimated. The results showed that organic carbon storage in peatlands was about 238.134 billion metric tons of carbon in the world. The organic carbon unevenly distributes in peatlands of the continents. The organic carbon storage in peatlands in North America was about 109.864 billion metric tons of carbon, accounting for 46.14% of the total carbon storage in the world, which was the most abundant. The organic carbon storages in Europe and Asia were accounting for 27.41% and 22.89% of the total, respectively. At present, many countries still had not accurate data of peat reserves and organic carbon storage in peatlands. The main obstacle of estimating organic carbon storage in peatlands lied in the different definitions of peatlands among countries, lacking data base of peat thickness and peat bulk density, or due to the different scope of statistics, leading to inaccurate estimation. Finally, main influencing factors of dynamic of organic carbon storage in peatlands were presented. The results of this study tried to provide scientific basis for the sustainable use of peat resources and protection of carbon storage function ofpeatlands.
出处
《湿地科学》
CSCD
北大核心
2014年第3期279-285,共7页
Wetland Science
基金
中国人民大学科学研究基金(中央高校基本科研业务费专项资金)项目(13XNI004)资助
关键词
泥炭
泥炭地
有机碳储量
世界
影响因素
peat
peatlands
organic carbon storage
world
influencing factor
