Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China)

doi:10.1016/j.jseaes.2016.11.001

	Oxygen isotopic composition of bulk carbonates in recent sediments from Lake Kuhai (NW China)
	Li, Xiangzhong; Zhou, Xin; Liu, Weiguo; Fan, Guoqing; Cheng, Peng; Xu, Liming
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2017-02
卷号	134 页码:150-159
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2016.11.001
英文摘要	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.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34569]
专题	青海盐湖研究所_管理部门
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)[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).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)".JOURNAL OF ASIAN EARTH SCIENCES 134(2017):150-159.