摘要
我国是世界能源消费和CO_2总排放量第一大国,碳减排任务艰巨,责任重大。据调查,我国岩溶碳汇与森林、土壤碳汇在同一数量级,但其要在国家层面发挥重大作用,其影响因素及机理需要进一步调查和阐释,估算精度还有待提高。系统总结了流域尺度岩溶碳循环过程,并重点揭示了生物作用对岩溶碳循环的影响;研究了水圈二氧化碳的再循环规律;评估了外源水对岩溶作用的影响程度和促进强度;利用数学回归模型估算区域岩溶碳汇通量,提高了由点到面岩溶碳汇通量估算精度,并提出增加岩溶碳汇潜力技术途径,为我国岩溶碳汇通量科学估算提供支撑。
China, as the biggest energy consumer with large amounts of CO2 emissions, is faced with an arduous task and responsibility for carbon emission reduction. According to previous studies, karst carbon sequestration flux has the same magnitude as forest carbon sequestration and soil carbon sequestration in the country. In order to make the best of karst carbon sequestration, it is necessary to further investigate and clarify the influencing factors and mechanisms of karst carbon sequestration, and to improve the estimation accuracy. In this paper, systematic discussions are made on the process of carbon cycle at watershed scale, with the focus on the biological effects of karst carbon cycle, study of the regulations of carbon dioxide recycle in hydrosphere, and assessment of the influence level and promote strength of allogenic water to karstification. By using a mathematical regression model, we estimated the carbon fluxes in karst region to improve the overall estimation precision, and proposed techniques to increase the karst potential carbon sequestration. All of these results provide fundamental support for the scientific estimation of karst carbon sequestration flux in China.
出处
《中国地质调查》
2014年第3期57-66,共10页
Geological Survey of China
基金
中国地质调查"中国岩溶碳汇过程及效应研究(编号:1212011087120)"项目资助
关键词
岩溶碳循环
影响因素
生物作用
外源水
增汇途径
Karst carbon cycle
effect factors
biological effects
allogenic water
carbon sequestration potentialtechnical approaches
