A cave delta O-18 based 1800-year reconstruction of sediment load and streamflow: The Yellow River source area

doi:10.1016/j.catena.2017.09.028

	A cave delta O-18 based 1800-year reconstruction of sediment load and streamflow: The Yellow River source area
	Xu, Jiongxin
刊名	CATENA
	2018-02-01
卷号	161 页码:137-147
关键词	Paleohydrological reconstruction Isotopes of oxygen River sediment load reconstruction Asian summer monsoon The Yellow River
ISSN号	0341-8162
DOI	10.1016/j.catena.2017.09.028
通讯作者	Xu, Jiongxin(xujx@igsnrr.ac.cn)
英文摘要	Located on the northeast edge of the Qinghai-Tibet Plateau in China, the Yellow River source area (YRSA) is the river's major water source area and therefore it is called "water tower" of the Yellow River. However, the instrumental data are only 50-years, based on which the hydrological response at 100-1000 years cannot be understand properly. Although many results of streamflow reconstruction are published, the results of high resolution suspended sediment load (SSL) reconstruction have not been reported yet. Here we show that the Wanxiang Cave delta O-18 record (Zhang et al., 2008) can be used to reconstruct the SSL of the YRSA along with the mean annual streamflow, annual maximum discharge and precipitation. Based on the data of the overlapping period (1961-2001) after 5-year moving, calibration equations were established, using regression method. The R of annual stream flow, SSL, maximum discharge and precipitation with 5-year moving delta O-18 is - 0.768, - 0.763, - 0.692 and - 0.803, respectively, at p < 0.000001. After validation using Leave-One-Cross Validation method, we reconstructed the 1800-year variations in these variables. Based on statistical analysis, we proved the existence of the following cause-effect chain: the weakened (or strengthened) Asian Summer Monsoon recorded by cave delta O-18 -> increased (or decreased) water vapor to the YRSA -> increased (or decreased) precipitation -> increased (or decreased) streamflow -> increased (or decreased) SSL. These links provide the scientific basis for the paleo-hydrological reconstruction. Over the past 1800 years, the Qinghai-Tibet Plateau's water tower effect on the Yellow River showed an overall decreasing trend, with the 5-year moving streamflow decreased at a rate of 4.81 million m(3)/year. Eight stages of alternative decrease and increase were identified, of which two long continuing decline stages are likely one of the factor that caused the collapse of the Tang and Ming dynasties. The uncertainties that should be considered to improve the model in the future are also discussed.
资助项目	National Natural Science Foundation of China[41371037] ; National Natural Science Foundation of China[41330751]
WOS关键词	PAST 50 YEARS ; CLIMATE-CHANGE ; STALAGMITE DELTA-O-18 ; RECORD ; CHINA ; HOLOCENE ; MONSOON ; BASIN ; FLOW ; OSCILLATION
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000414883400013
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/61034]
专题	中国科学院地理科学与资源研究所
通讯作者	Xu, Jiongxin
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jiongxin. A cave delta O-18 based 1800-year reconstruction of sediment load and streamflow: The Yellow River source area[J]. CATENA,2018,161:137-147.
APA	Xu, Jiongxin.(2018).A cave delta O-18 based 1800-year reconstruction of sediment load and streamflow: The Yellow River source area.CATENA,161,137-147.
MLA	Xu, Jiongxin."A cave delta O-18 based 1800-year reconstruction of sediment load and streamflow: The Yellow River source area".CATENA 161(2018):137-147.