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DOI	10.1016/j.nimb.2009.10.100
	Changes of organic matter sources in sediment cores from a high-altitude lake (Pumoyum Co, southeastern Tibetan plateau) over the last 19,000 years
	Watanabe, Takahiro; Matsunaka, Tetsuya; Nakamura, Toshio; Nishimura, Mitsugu; Nara, Fumiko Watanabe; Kakegawa, Takeshi; Zhu, Liping
通讯作者	Watanabe, T (通讯作者)
发表日期	2010
ISSN	0168-583X
起始页码	1070
结束页码	1072
卷号	268 期号:7-8
英文摘要	Lake Pumoyum Co is on the southeastern Tibetan plateau (altitude, similar to 5030 m asl; lake surface area, 281 km(2); maximum water depth, 65 m). We obtained C-14 dates on total organic carbon (TOC) for three sediment cores from Lake Pumoyum Co, covering the period from the last glacial to the Holocene, and compared them with C-14 ages on plant residue concentrates (PRC fraction, mainly terrestrial plant residues) and aquatic plant fragments in the cores. The calibrated ages of TOC were older than those of the PRC fraction in the sediment cores by ca. 0.6-11.3 kyr. The calculated dead carbon fraction (f(dead carbon)) values for TOC increased during 9.5-5.5 cal ka BP, and fluctuations of f(dead carbon) paralleled variations in Asian monsoon intensity [Y. Wang et al., Nature 451 (2008) 1090]. One possible explanation for these results is that large amounts of terrestrial organic materials containing old carbon were supplied to the lake (old carbon effects from lake terrace, paleosol and/or stratum with dead C-14) when the lake level rose rapidly and its catchment area expanded during the Holocene climate optimum (9.5-5.5 cal ka BP). (C) 2009 Elsevier B.V. All rights reserved.
关键词	EAST-ASIA MONSOON CHINA GLACIATION
英文关键词	Tibetan plateau; Lake Pumoyum Co; AMS; Radiocarbon dating; Carbon cycles; Lake sediment; Organic matter sources; Environmental change; Climate change
语种	英语
WOS研究方向	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics
WOS类目	Instruments & Instrumentation ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical ; Physics, Nuclear
WOS记录号	WOS:000277462300095
来源期刊	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
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/257812
推荐引用方式 GB/T 7714	Watanabe, Takahiro,Matsunaka, Tetsuya,Nakamura, Toshio,et al. Changes of organic matter sources in sediment cores from a high-altitude lake (Pumoyum Co, southeastern Tibetan plateau) over the last 19,000 years[J]. 中国科学院青藏高原研究所,2010,268(7-8).
APA	Watanabe, Takahiro.,Matsunaka, Tetsuya.,Nakamura, Toshio.,Nishimura, Mitsugu.,Nara, Fumiko Watanabe.,...&Zhu, Liping.(2010).Changes of organic matter sources in sediment cores from a high-altitude lake (Pumoyum Co, southeastern Tibetan plateau) over the last 19,000 years.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,268(7-8).
MLA	Watanabe, Takahiro,et al."Changes of organic matter sources in sediment cores from a high-altitude lake (Pumoyum Co, southeastern Tibetan plateau) over the last 19,000 years".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 268.7-8(2010).