Geochemical isotopic composition in the Loess Plateau and corresponding source analyses: A case study of China's Yangjuangou catchment

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Geochemical isotopic composition in the Loess Plateau and corresponding source analyses: A case study of China's Yangjuangou catchment
	Han, Ning; Wang, Yafeng; Chen, Liding; Gao, Yang; Chen, Shibo; Chen, Weiliang; Hao, Zhuo; Jia, Junjie
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2017-03-01
卷号	581 期号:0 页码:794-800
关键词	Loess Plateau Isotopic Fractionation Carbon Nitrogen Oxygen Hydrogen
英文摘要	Isotopic fractionation technology is widely used in identifying sources and the speciation of geochemical isotopic elements. With the increase in human activity, geochemical element transport by soil erosion has become the most critical environmental problem in the Loess Plateau, so tracing the geochemical element source would help in the identification and management of local soil erosion. In this study, we investigated the spatial distribution of carbon (C), nitrogen (N), oxygen (0), and hydrogen (H) isotopes in water and then further analyzed C-13 and N-15 in soil and vegetation to better understand the C and N sources and their biogeochemical cycling function in the Loess Plateau. Results showed that mean dual isotopic values of delta N-15-NO3- and delta O-18-NO3- in the watershed streams were 11.44 +/- 6.15 parts per thousand and -11.29 +/- 2.52 parts per thousand, respectively, and that N wet deposition, fertilizers, and manure were the three main pollution sources. The mean dual isotopic value of delta C-13 in the water was -5.36 +/- 0.28 parts per thousand, indicating that delta C-13-DIC in the Yangjuangou Catchment of China's Loess Plateau is mainly controlled by carbonate weathering or soil erosion. The severe erosion in this region has typically occurred in grassy (C-4) land-use types devoid of woody vegetation (C-3), and this has led to a discrepancy in delta C-13 between soil and water. We found delta(18)Dand delta D-2 in water to be -7.87 +/- 0.85 parts per thousand and -61.49 +/- 325 parts per thousand, respectively, and to show a high positive correlation (r(2) = 0.81). This suggests that summer rainstorms lead to soil erosion and runoff, which cause a wide range of isotopic values to occur across the Loess Plateau. (C) 2017 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39028]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Han, Ning,Wang, Yafeng,Chen, Liding,et al. Geochemical isotopic composition in the Loess Plateau and corresponding source analyses: A case study of China's Yangjuangou catchment[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,581(0):794-800.
APA	Han, Ning.,Wang, Yafeng.,Chen, Liding.,Gao, Yang.,Chen, Shibo.,...&Jia, Junjie.(2017).Geochemical isotopic composition in the Loess Plateau and corresponding source analyses: A case study of China's Yangjuangou catchment.SCIENCE OF THE TOTAL ENVIRONMENT,581(0),794-800.
MLA	Han, Ning,et al."Geochemical isotopic composition in the Loess Plateau and corresponding source analyses: A case study of China's Yangjuangou catchment".SCIENCE OF THE TOTAL ENVIRONMENT 581.0(2017):794-800.