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DOI	10.1016/j.quaint.2008.12.010
	Stable isotope and ostracode species assemblage evidence for lake level changes of Nam Co, southern Tibet, during the past 600 years
	Wrozyna, Claudia; Frenzel, Peter; Steeb, Philip; Zhu, Liping; van Geldern, Robert; Mackensen, Andreas; Schwalb, Antje
通讯作者	Wrozyna, C (通讯作者)
发表日期	2010
ISSN	1040-6182
EISSN	1873-4553
起始页码	2
结束页码	13
卷号	212 期号:1
英文摘要	Ostracode species assemblages and stable oxygen and carbon isotopes of shells from two 2 Pb-210-dated short cores of 78 cm and 47 cm length taken from Lake Nam Co, southern Tibet, provide information about lake level history of the past approximately 600 years at decadal resolution. A transfer function is applied to reconstruct paleo-water depths from modern ostracodes. Ostracode assemblages and isotope data from five species allow a subdivision into phases of lake level evolution. Before similar to 1600 AD relatively low oxygen isotope values and high abundances of deep water (>30 m) ostracodes (i.e. ?Leucocythere dorsotuberosa, ?Leucocythere dorsotuberosa f. postilirata) suggest a lake level similar to 10 m higher than today. Between similar to 1600 AD and 1800 AD, more positive oxygen isotope values and higher abundances of shallow water ostracodes (i.e. Ilyocypris cf. mongolica, Candona xizangensis) suggest a lake level approximately 40 m below modern level. Between 1800 AD and similar to 1920 AD oxygen isotopes are characterized by a trend to more negative values followed by a trend to more positive ones. These trends are interrupted by several short-term fluctuations but overall, oxygen isotope values suggest a drop in lake level. A clearer lake level picture is provided by species assemblages that suggest a continuously increasing lake level since 1900 AD. Precipitation data from meteorological stations nearby show an increase in precipitation in the last 30 years. The low lake level between 1600 AD and 1800 AD is contemporary to the Little Ice Age. During that cold period, meltwater input into the lake decreased. This underlines the sensitivity of the level of Lake Nam Co to temperature changes on the Tibetan Plateau. (C) 2009 Elsevier Ltd and INQUA. All rights reserved.
关键词	ENVIRONMENTAL-CHANGES CARBON ISOTOPES TRACE-ELEMENT NW CHINA OXYGEN PLATEAU SEDIMENTS QINGHAI RECORD BASIN
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000274584900002
来源期刊	QUATERNARY INTERNATIONAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257822
推荐引用方式 GB/T 7714	Wrozyna, Claudia,Frenzel, Peter,Steeb, Philip,et al. Stable isotope and ostracode species assemblage evidence for lake level changes of Nam Co, southern Tibet, during the past 600 years[J]. 中国科学院青藏高原研究所,2010,212(1).
APA	Wrozyna, Claudia.,Frenzel, Peter.,Steeb, Philip.,Zhu, Liping.,van Geldern, Robert.,...&Schwalb, Antje.(2010).Stable isotope and ostracode species assemblage evidence for lake level changes of Nam Co, southern Tibet, during the past 600 years.QUATERNARY INTERNATIONAL,212(1).
MLA	Wrozyna, Claudia,et al."Stable isotope and ostracode species assemblage evidence for lake level changes of Nam Co, southern Tibet, during the past 600 years".QUATERNARY INTERNATIONAL 212.1(2010).