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7 世界河流碳同位素特征图 （a）DIC（世界河流n=197，中国4条河流n=36）；（b）DOC（世界河流n=502，中国4条河流n=33）；（c）POC（世界河流n=484，中国4条河流n=28）；方框代表各组分来源，红色虚线代表世界河流的平均值（包含本研究的数据），灰色柱形图代表河流样品碳同位素值的分布情况，世界河流碳同位素数据引自参考文献[20]

Fig.7 Plots of the isotopic values of δ13C vs. Δ14C for the world rivers (a) DIC (global n=197, four large rivers in China n=36); (b) DOC (global n=502, four large rivers in China n=33); (c) POC (global n=484, four large rivers in China n=28). The boxes represent the potential sources of the carbon pools, the red dashed lines represent the average data of the global rivers (include the data in this study), and the bar graphs represent the carbon isotopic distribution of all data the global river data is from reference [20]