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Stable oxygen isotope of ostracods in recent sediments of Lake Gahai in the Qaidam Basin, northwest China: The implications for paleoclimatic reconstruction
Li, XZ (Li, Xiangzhong)[1]; Liu, WG (Liu, Weiguo)[1,2]; Xu, LM (Xu, Liming)[3]
2012-08-30
Source PublicationGLOBAL AND PLANETARY CHANGE
Volume94-95Pages:13-15
Subtype期刊论文
Abstract

The oxygen isotopic composition of ostracod shells in lakes has been used as a useful indicator in palaeolimnological research and has provided some important contributions to the understanding of lacustrine systems. Usually, the oxygen isotopic compositions of ostracods from the lake sediments are interpreted as changes in effective precipitation, temperature and evaporation/input water ratio in a sub-arid or arid area. Here, we compare a 150-year-long oxygen-isotope record that was derived from ostracod carbonate from the sediments of Lake Gahai in the Qaidam Basin with meteorological data (precipitation) and tree-ring evidence for changing precipitation. Our results show that the oxygen isotopic compositions of ostracod shells are related to precipitation over the past 150 years. In general, increased precipitation accompanied a shift to less positive delta O-18 values in the lake water, and thus in the ostracod shells, whereas decreased precipitation coincided with the opposite in Lake Gahai over the past 150 yr. Therefore, we conclude that the oxygen isotopic compositions of ostracod shells can be used to indicate changes in precipitation over a short time scale in lake Gahai.

KeywordOxygen Isotope Ostracod Precipitation Lake Gahai
DOI10.1016/j.gloplacha.2012.06.005
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10098
Collection加速器质谱中心
Corresponding AuthorLi, XZ (Li, Xiangzhong)[1]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, IEE, CAS, Xi'an, 710075, China;
2.School of Human Settlement and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;
3.Qinghai Institute of Salt Lakes, CAS, Xining, 810008, China
Recommended Citation
GB/T 7714
Li, XZ ,Liu, WG ,Xu, LM . Stable oxygen isotope of ostracods in recent sediments of Lake Gahai in the Qaidam Basin, northwest China: The implications for paleoclimatic reconstruction[J]. GLOBAL AND PLANETARY CHANGE,2012,94-95:13-15.
APA Li, XZ ,Liu, WG ,&Xu, LM .(2012).Stable oxygen isotope of ostracods in recent sediments of Lake Gahai in the Qaidam Basin, northwest China: The implications for paleoclimatic reconstruction.GLOBAL AND PLANETARY CHANGE,94-95,13-15.
MLA Li, XZ ,et al."Stable oxygen isotope of ostracods in recent sediments of Lake Gahai in the Qaidam Basin, northwest China: The implications for paleoclimatic reconstruction".GLOBAL AND PLANETARY CHANGE 94-95(2012):13-15.
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