中国主要河流输送陆源碳的同位素特征及影响因素

单森, 齐远志, 罗春乐, 付文静, 薛跃君, 王旭晨

Carbon Isotopic Constrains on the Sources and Controls of the Terrestrial Carbon Transported in the Four Large Rivers in China

Sen Shan, Yuanzhi Qi, Chunle Luo, Wenjing Fu, Yuejun Xue, Xuchen Wang

图6 同位素三端元模型计算得到的不同来源对长江、黄河、珠江和黑龙江河流碳的贡献 (a)DIC; (b)DOC; (c)POC; DIC 3个端元分别为：大气入侵（f1）、有机质降解（f2）、碳酸盐岩溶解（f3）；DOC及POC 3个端元分别为：现代植物（f1）、土壤预陈化有机质（f2）、化石燃料（f3)

Fig.6 Calculated contributions of the three potential sources to riverine carbon in the Changjiang， Huanghe，Zhujiang and Heilongjiang rivers studied (a)DIC, (b)DOC and (c)POC; The endmembers for DIC are: Atmosphere invasion (f1), organic matter degradation (f2), and carbonate dissolution (f3). The endmembers for DOC and POC are: Plant (f1), pre-aged soil (f2) and fossil (f3)