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DOI	10.1029/2021PA004393
	Calibration and Application of Branched GDGTs to Tibetan Lake Sediments: The Influence of Temperature on the Fall of the Guge Kingdom in Western Tibet, China
	Liang, Jie; Guo, Yanlong; Richter, Nora; Xie, Haichao; Vachula, Richard S.; Lupien, Rachel L.; Zhao, Boyang; Wang, Mingda; Yao, Yuan; Hou, Juzhi; Liu, Jianbao; Russell, James M.
通讯作者	Liang, J ; Xie, HC (通讯作者)
发表日期	2022
ISSN	2572-4517
EISSN	2572-4525
卷号	37 期号:5
英文摘要	Branched glycerol dialkyl glycerol tetraethers (brGDGTs) from lacustrine sediments have been widely used to reconstruct mean annual air temperature (MAAT). Although many proxy calibrations relating brGDGT characteristics have been put forth, these calibrations may produce warm biases when applied to lakes in cold regions. We present an expanded Chinese lake surface sediment brGDGT-MAAT calibration with 29 new surface samples from cold regions along with 39 previously published from Chinese lakes. We deployed sediment traps in a meromictic lake, Dagze Co, and compared results with previously published data from a dimictic lake, Lake 578 in Greenland, to determine potential seasonal and depth-dependence of brGDGTs. In the meromictic lake, brGDGTs are primarily produced in the lake bottom water, whereas in the dimictic lake, the brGDGTs are produced throughout the water column and mainly reflect the annual bottom water temperature or mixing season water column temperature. We applied our refined calibration to a sediment core from Western Tibet to examine how fluctuations in temperature influenced the Guge Kingdom over the last 2,000 years. Our record reveals relatively warm temperatures during the Medieval Climate Anomaly, cooling of 2 degrees C to -2 degrees C during the Little Ice Age, warming into the eighteenth century, and stabilization after 1800 CE. The temperature variations coincided with a transition of dynasties in Western Tibet. Temperature sensitivity tests on barley distribution, the principal cultivated cereal in Tibet, suggest that a decline in temperature led to a decreased crop yield that may have factored into the disappearance of the Guge Kingdom.
关键词	DIALKYL GLYCEROL TETRAETHERS CBT PALEOTEMPERATURE PROXY SEASONAL VARIABILITY SUMMER TEMPERATURE MEMBRANE-LIPIDS BRGDGTS PEAT RECONSTRUCTIONS IDENTIFICATION APPLICABILITY
英文关键词	paleothermometer; 5-and 6-methyl brGDGTs; temperature calibration; China; lacustrine sediments; the Common Era
语种	英语
WOS研究方向	Geology ; Oceanography ; Paleontology
WOS类目	Geosciences, Multidisciplinary ; Oceanography ; Paleontology
WOS记录号	WOS:000789931000001
来源期刊	PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
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/260770
推荐引用方式 GB/T 7714	Liang, Jie,Guo, Yanlong,Richter, Nora,et al. Calibration and Application of Branched GDGTs to Tibetan Lake Sediments: The Influence of Temperature on the Fall of the Guge Kingdom in Western Tibet, China[J]. 中国科学院青藏高原研究所,2022,37(5).
APA	Liang, Jie.,Guo, Yanlong.,Richter, Nora.,Xie, Haichao.,Vachula, Richard S..,...&Russell, James M..(2022).Calibration and Application of Branched GDGTs to Tibetan Lake Sediments: The Influence of Temperature on the Fall of the Guge Kingdom in Western Tibet, China.PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY,37(5).
MLA	Liang, Jie,et al."Calibration and Application of Branched GDGTs to Tibetan Lake Sediments: The Influence of Temperature on the Fall of the Guge Kingdom in Western Tibet, China".PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY 37.5(2022).