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DOI	10.1007/s11430-015-5214-3
	Distribution of GDGTs in lake surface sediments on the Tibetan Plateau and its influencing factors
	Wang MingDa; Liang Jie; Hou Juzhi; Hu Liang
通讯作者	Wang, MD (通讯作者)
发表日期	2016
ISSN	1674-7313
EISSN	1869-1897
起始页码	961
结束页码	974
卷号	59 期号:5
英文摘要	Quantitative paleotemperature records are vital not only for verifying and improving the accuracy of climate model simulations, but also for estimating the amplitude of temperature variability under global warming scenarios. The Tibetan Plateau (TP) affects atmospheric circulation patterns due to its unique geographical location and high elevation, and studies of the mechanisms of climate change on the TP are potentially extremely valuable for understanding the relationship of the region with the global climate system. With the development of biomarker-based proxies, it is possible to use lake sediments to quantitatively reconstruct past temperature variability. The source of Glycerol Dialkyl Glycerol Tetraethers (GDGTs) in lake sediments is complex, and their distribution is controlled by both climatic and environmental factors. In this work, we sampled the surface sediments of 27 lakes on the TP and in addition obtained surface soil samples from six of the lake catchments. We analyzed the factors that influence GDGT distribution in the lake sediments, and established quantitative relationship between GDGTs and Mean Annual Air Temperature (MAAT). Our principal findings are as follows: the majority of GDGTs in the lake sediments are bGDGTs, followed by crenarchaeol and GDGT-0. In most of the lakes there were no significant differences between the GDGT distribution within the lake sediments and the soils in the same catchment, which indicates that the contribution of terrestrial material is important. iGDGTs in lake sediments are mainly influenced by water chemistry parameters (pH and salinity), and that in small lakes on the TP, TEX86 may act as a potential proxy for lake pH; however, in contrast bGDGTs in the lake sediments are mainly controlled by climatic factors. Based on the GDGT distribution in the lake sediments, we used proxies (MBT, CBT) and the fractional abundance of bGDGTs (f(abun)) to establish calibrations between GDGTs and MAAT, respectively, which potentially provide the basis for paleoclimatic reconstruction on the TP.
关键词	DIALKYL GLYCEROL TETRAETHERS CRENARCHAEOTAL MEMBRANE-LIPIDS SUMMER MONSOON TEMPERATURE VARIABILITY PALEOTEMPERATURE PROXY MIDLATITUDE WESTERLIES ENVIRONMENTAL CONTROLS PARTICULATE MATTER BRANCHED GDGTS YENISEI RIVER
英文关键词	Tibetan Plateau; Lake sediment; Soil; GDGT calibration; Quantitative reconstruction
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000374966200008
来源期刊	SCIENCE CHINA-EARTH SCIENCES
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/258697
推荐引用方式 GB/T 7714	Wang MingDa,Liang Jie,Hou Juzhi,et al. Distribution of GDGTs in lake surface sediments on the Tibetan Plateau and its influencing factors[J]. 中国科学院青藏高原研究所,2016,59(5).
APA	Wang MingDa,Liang Jie,Hou Juzhi,&Hu Liang.(2016).Distribution of GDGTs in lake surface sediments on the Tibetan Plateau and its influencing factors.SCIENCE CHINA-EARTH SCIENCES,59(5).
MLA	Wang MingDa,et al."Distribution of GDGTs in lake surface sediments on the Tibetan Plateau and its influencing factors".SCIENCE CHINA-EARTH SCIENCES 59.5(2016).