Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes
文献类型：期刊论文
| 作者 | Gao, Yang; Jia, Junjie; Lu, Yao; Zhou, Feng; Hao, Zhuo; Johnes, Penny J.; Dungait, Jennifer A. J.; Shi, Kun |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2020 |
| 卷号 | 588 |
| 英文摘要 | Understanding land-use change accompanied by anthropogenic activities under alterations in watershed size regulations or differential carbon (C) isotope characteristics remain a challenge in C cycling research. In this study, we investigate changes in the export of C composition and its isotopic characteristics at multiple scales in a subtropical cascading watershed in China. Results show that C concentrations in rainfall and dissolved total carbon (DTC), dissolved organic carbon (DOC) and delta C-13 in runoff seasonally fluctuate at a temporal scale. On average, the delta C-13 from silicate rock weathering was 31-32%, contributing the largest amount of delta C-13 in the different watersheds. Moreover, the contribution of isotopic composition from atmospheric deposition to the delta C-13 fraction increased as watershed size increased, while the corresponding contribution from soil organic matter (SOM) decomposition decreased. On the other hand, anthropogenic activities play a dominant role in the isotopic composition of large watersheds. In addition, the correlation coefficient between C transport via runoff and the delta O-18 value in rainfall increased as watershed size increased. This indicated that as a source rainfall had an obvious influence on C transport in runoff according to proportional values measured in event and pre-event water. |
| 源URL | [http://159.226.73.51/handle/332005/20141]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Gao, Yang,Jia, Junjie,Lu, Yao,et al. Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes[J]. JOURNAL OF HYDROLOGY,2020,588. |
| APA | Gao, Yang.,Jia, Junjie.,Lu, Yao.,Zhou, Feng.,Hao, Zhuo.,...&Shi, Kun.(2020).Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes.JOURNAL OF HYDROLOGY,588. |
| MLA | Gao, Yang,et al."Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes".JOURNAL OF HYDROLOGY 588(2020). |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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