Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes

doi:10.1016/j.jhydrol.2020.125139

	Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes
	Gao, Yang 1,3; Jia, Junjie 1,3; Lu, Yao 1,3; Zhou, Feng 4; Hao, Zhuo 1,3; Johnes, Penny J.5; Dungait, Jennifer A. J.6; Shi, Kun 2
刊名	JOURNAL OF HYDROLOGY
	2020-09-01
卷号	588 页码:11
关键词	C transport C-13 Watershed Scale effect Hydrological process
ISSN号	0022-1694
DOI	10.1016/j.jhydrol.2020.125139
通讯作者	Gao, Yang(gaoyang@igsnrr.ac.cn)
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.
资助项目	National Nature Science Foundation of China[41922003] ; National Nature Science Foundation of China[41871080] ; National Nature Science Foundation of China[41830860]
WOS关键词	LAND-USE ; STABLE-ISOTOPES ; ORGANIC-MATTER ; FUTURE CLIMATE ; SOIL CARBON ; RIVER ; CATCHMENT ; TERRESTRIAL ; EFFICIENCY ; STREAMFLOW
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000568826300017
资助机构	National Nature Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156873]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Yang
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, State Key Lab Lake Sci & Environm, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Peking Univ, Coll Urban & Environm Sci, Sinofrench Inst Earth Syst Sci, Beijing, Peoples R China 5.Univ Bristol, Sch Geog Sci, Univ Rd, Bristol BS8 1SS, Avon, England 6.Univ Exeter, Geog, CLES, Amory Bldg,Rennes Dr, Exeter EX4 4RJ, Devon, England
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,2020,588:11.
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,588,11.
MLA	Gao, Yang,et al."Cascading multiscale watershed effects on differential carbon isotopic characteristics and associated hydrological processes".JOURNAL OF HYDROLOGY 588(2020):11.