Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau

ISL OpenIR > 青海盐湖研究所知识仓储

	Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau
	Li, Xiangzhong 1; Zhou, Xin 2; Liu, Weiguo 1,3; Fan, Guoqing 4; Cheng, Peng 1; Xu, Liming5
	2017-02-01
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
卷号	134 页码:150-159
关键词	Oxygen Isotope Bulk Carbonates Streamflows Yellow River Tibetan Plateau
摘要	The water resource issue is one of the most significant problems in the Yellow River basin, and has received much attention from the public and government because of the dramatically decreased Yellow River streamflow in the last several years. In this study, oxygen isotopic compositions of bulk carbonates from Lake Kuhai in the headwaters of the Yellow River were evaluated as an indirect proxy of past Yellow River streamflow in order to place the recent flow reduction in a long-term context. The results indicated that delta 18O values of bulk carbonates from core KHC14-1 generally vary with changes in the Yellow River streamflows related to the precipitation/evaporation (temperature) ratio above the Tangnaihai hydrological station over the past 50 years. In general, the Yellow River streamflow in the headwaters area continued to decrease from the early 1980s to the late 1990s because of decreased precipitation and increased temperature. Then, the streamflow increased with enhancing precipitation over the last two decades. In addition, delta O-18 values of bulk carbonates in the Lake Kuhai core roughly correlate with the streamflows of the upper reaches of the Yellow River recorded by tree ring width over the past 800 years. The enriched delta O-18(BC) values showed that the precipitation/evaporation (P/E) ratio or streamflow was very low and the climate might be very dry in the middle of the 1400s CE in the headwaters of the Yellow River over the past 800 years. Our results suggested that changes in the P/E ratio or streamflow of the upper reaches of the Yellow River were dominated by variations in Indian Summer Monsoon precipitation over a long time scale, consistent with other records from the northeastern Tibetan Plateau. (C) 2016 Elsevier Ltd. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4249
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所支撑部门
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China 4.Hydrol Bur Yellow River Conservancy Commiss, Zhengzhou 450003, Peoples R China 5.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangzhong,Zhou, Xin,Liu, Weiguo,et al. Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,134:150-159.
APA	Li, Xiangzhong,Zhou, Xin,Liu, Weiguo,Fan, Guoqing,Cheng, Peng,&Xu, Liming.(2017).Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau.JOURNAL OF ASIAN EARTH SCIENCES,134,150-159.
MLA	Li, Xiangzhong,et al."Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China) and implications for hydroclimatic changes in headwater areas of the Yellow River on the northeastern Tibetan Plateau".JOURNAL OF ASIAN EARTH SCIENCES 134(2017):150-159.