摘要
泥炭地土壤碳储量占到了全球土壤碳库的1/3,与气候变化的关系密切.这一背景下,泥炭地土壤碳库的大小及变化受到了学者的广泛关注.本文聚焦泥炭地土壤碳库估算,梳理不同估算方法的原理及优缺点,对比不同研究中我国泥炭地的分布、面积及碳库估算大小,并对我国不同区域泥炭地土壤碳库形成的主要驱动因子进行探讨.评述了目前的研究进展及存在的问题,并展望了未来泥炭地土壤碳库的研究思路,以期为准确估算我国泥炭地土壤碳库提供方法论参考,为我国实施“双碳”(碳达峰、碳中和)战略提供科学支撑.
Peatlands,despite covering only 3%to 4%of the global land area,constitute a significant one-third of the global soil carbon pool and are closely linked to climate change.Understanding the variations in the carbon pool in peatlands,determined by the balance between net primary production(NPP)and organic decomposition,is crucial for comprehending the relationship between the global carbon cycle and global change.However,the response of the peatland carbon pool to climate change remains poorly understood,contributing to a significant source of uncertainty in climate projections.Consequently,the study of peatland soil carbon pools has attracted extensive attention as a research hotspot among scholars.This paper provides a concise summary and evaluation of three estimation methods for peatland carbon pools:The‘peat volume approach’,the‘carbon density approach’,and the‘time history approach’.Each method is analyzed in terms of its advantages,disadvantages,and sources of uncertainty.The‘peat volume approach’and the‘carbon density approach’subjectively homogenize the thickness and carbon density of peat layers during the calculation process,neglecting the autogenic processes of peatlands,which can lead to potential errors.In contrast,the‘time history approach’,based on precise chronologies,calculates the net carbon balance of peatlands over time intervals and aggregates them to determine the size of the peatland carbon pool.Through the comparison of different studies on the distribution and area of peatlands in China,it is concluded that the most accurate estimate of China’s peatland area is between 10.07×104 km2 and 13.70×104 km2.Additionally,several studies on peatland carbon pool estimation in northeastern China and the Zoige Basin indicate average values of 1.56 Gt C(0.14−4.34 Gt C)and 0.75 Gt C(0.39−1.42 Gt C),respectively.Furthermore,an analysis of peatland development and carbon accumulation characteristics in northeastern China,the Tibetan Plateau,and the Chinese subtropical monsoo
作者
刘滨
刘汉向
贾佳
Bin Liu;Hanxiang Liu;Jia Jia(College of Geography and Environmental Science,Zhejiang Normal University,Jinhua 321004,China;Key Laboratory of Watershed Earth Surface Processes and Ecological Security of Jinhua City,Jinhua 321004,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2024年第12期1613-1624,共12页
Chinese Science Bulletin
基金
国家自然科学基金(42001081)资助。
关键词
泥炭地
土壤碳库
中国
碳达峰与碳中和
peatland
soil carbon pool
China
carbon peaking and carbon neutrality
