摘要
近几年来对岩溶碳汇的争论越来越多,其关键问题是岩溶作用产生的重碳酸根是否稳定。本文以贵州草海流域为研究区,基于前人研究基础,以碳同位素模型计算出岩溶作用产生的DIC((Dissolved Inorganic Carbon溶解无机碳)中58.8%为草海中为水生植物利用,草海地质碳汇量达588.67tC/a。以此推算长江中下游湖泊沉水植物每年固碳量370602tC/a,长江中下游湖泊中仅沉水植物稳定的地质风化CO2汇量约为75万吨。从而证明岩溶碳汇的相对稳定性和岩溶动力系统新理论的合理性。
In recent years, there have been more and more debates concerning karst carbon sink or source, and the key problem is weather the bicarbonate from carbonate rock dissolution is stable. With the Caohai Lake basin as the study area, on the basis of previous researches, and by utilizing the carbon isotope model, the authors conducted studies and found that 58.8% of bicarbonate is utilized by aquatic plants. The Caohai basin geological carbon sink amount is 588.67 tC/a. Submerged plants of lakes along the middle and lower reaches of the Yangtze River can fix 370602 tC/a of carbon, and this means that every year 750000 tons of CO2 from geological weathering will be stabilized by submerged plants. So carbon sink effect related to carbonate rock dissolution is quite stable and the new karst dynamic system is rational.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2012年第6期947-952,共6页
Acta Geoscientica Sinica
基金
中国地质调查局地质调查项目"地质碳汇潜力综合研究"(编号:1212011087119)
中国地质科学院基本科研业务费项目(编号:2010-SYS-15)联合资助
关键词
地质碳汇
稳定性
草海
水生植物
碳同位素
geological carbon sink
stability
Caohai Lake
aquatic plants
carbon isotope
