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DOI	10.1007/s10933-021-00215-8
	A record of late Holocene precipitation on the Central Tibetan Plateau inferred from varved lake sediments
	Ji, Kejia; Zhu, Erlei; Chu, Guoqiang; Aquino-Lopez, Marco A.; Hou, Juzhi
通讯作者	Hou, JZ (通讯作者)
发表日期	2021
ISSN	0921-2728
EISSN	1573-0417
起始页码	439
结束页码	452
卷号	66 期号:4
英文摘要	Lake sediments on the Tibetan Plateau are important natural archives for studying past climate and environment changes. A precise sediment core chronology is a fundamental prerequisite for reconstructing past climate and environment changes. However, radiocarbon dates on bulk carbon in lake sediment cores are subject to old carbon reservoir effects, which can cause problems when trying to establish depth-age relations for sediment cores, especially those from the Tibetan Plateau (TP). Here we present a varve chronology that spans the last similar to 2000 years, from Jiang Co, on the central TP. Clastic-biogenic varves in Jiang Co sediments are comprised of two laminae, a coarse-grain and a fine-grain layer, observed by petrographic microscope and Electron Probe Micro Analyzer. The varve chronology is supported by Pb-210 and Cs-137 dating and was used to estimate the radiocarbon reservoir ages for the past similar to 2000 years. The thickness percentage of the coarse-grain layer within a single varve was used as a proxy for summer precipitation amount, as coarse grains are transported mainly by runoff. During the past 2000 years, the precipitation record inferred from Jiang Co sediments shows centennial-scale fluctuations that are consistent with other records from the region. The varve chronology from Jiang Co provided a valuable opportunity to estimate the old carbon reservoir effect in Jiang Co and reconstruct past precipitation on the Tibetan Plateau.
关键词	CLIMATE-CHANGE PB-210 CHINA AGE GEOCHRONOLOGY CHRONOLOGIES VARIABILITY CALIBRATION MONSOON BASIN
英文关键词	Tibetan Plateau; Varve chronology; Jiang Co; Precipitation
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Limnology
WOS记录号	WOS:000685597600001
来源期刊	JOURNAL OF PALEOLIMNOLOGY
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/260245
推荐引用方式 GB/T 7714	Ji, Kejia,Zhu, Erlei,Chu, Guoqiang,et al. A record of late Holocene precipitation on the Central Tibetan Plateau inferred from varved lake sediments[J]. 中国科学院青藏高原研究所,2021,66(4).
APA	Ji, Kejia,Zhu, Erlei,Chu, Guoqiang,Aquino-Lopez, Marco A.,&Hou, Juzhi.(2021).A record of late Holocene precipitation on the Central Tibetan Plateau inferred from varved lake sediments.JOURNAL OF PALEOLIMNOLOGY,66(4).
MLA	Ji, Kejia,et al."A record of late Holocene precipitation on the Central Tibetan Plateau inferred from varved lake sediments".JOURNAL OF PALEOLIMNOLOGY 66.4(2021).