气候变化领域集成服务门户(CCPortal): Last glacial-Holocene geochronology of sediment cores from a high-altitude Tibetan lake based on AMS C-14 dating of plant fossils: Implications for paleoenvironmental reconstructions

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DOI	10.1016/j.chemgeo.2010.07.004
	Last glacial-Holocene geochronology of sediment cores from a high-altitude Tibetan lake based on AMS C-14 dating of plant fossils: Implications for paleoenvironmental reconstructions
	Watanabe, Takahiro; Matsunaka, Tetsuya; Nakamura, Toshio; Nishimura, Mitsugu; Izutsu, Yasuhiro; Minami, Motoyasu; Nara, Fumiko Watanabe; Kakegawa, Takeshi; Wang, Junbo; Zhu, Liping
通讯作者	Watanabe, T (通讯作者)
发表日期	2010
ISSN	0009-2541
EISSN	1872-6836
起始页码	21
结束页码	29
卷号	277 期号:1-2
英文摘要	We obtained three sediment cores from a high-altitude lake (Lake Pumoyum Co; altitude, similar to 5020 m as!) on the southern Tibetan plateau for reconstruction of environmental changes during the last glacial-Holocene transition. In this study, we established the first reliable chronology for sediment cores from Lake Pumoyum Co, ca. 18.5 cal ka BP at the bottom, by C-14 analyses of terrestrial plant residue concentrates (PRC, >125 mu m) and aquatic plant residues. The calibrated ages of the PRC fraction in the surface sediment were nearly modern (0.1 +/- 0.1 cal ka BP), and the delta C-13 values ( -22%. to -24%.) were agreed well with those of modern terrestrial C-3 plants. In addition, we estimated C-14 reservoir ages of macrophyte remains from changes in their delta C-13 values. The major climate boundary layers in the cores (transitions to Bolling-Allerod, 14.5 +/- 0.5 cal ka BP: Younger Dryas, 12.8 +/- 0.1 cal ka BP: and Preboreal, similar to 11.6 cal ka BP) were confirmed by our new C-14 chronology. The transition to the Bolling-Allered warm phase from the last glacial (14.5 +/- 0.5 cal ka BP) coincided with an obvious lithologic boundary (a rapid decrease in the abundance of the macrophyte remains) in the lake Pumoyum Co sediment cores. (C) 2010 Elsevier B.V. All rights reserved.
关键词	ATMOSPHERIC RADIOCARBON CALIBRATION SUMXI CO MONSOON PLATEAU CLIMATE QINGHAI ISOTOPE CARBON BAIKAL RECORD
英文关键词	Tibetan plateau; Lake Pumoyum Co; Radiocarbon dating; delta C-13; Reservoir effect; Old carbon effect
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000282861700002
来源期刊	CHEMICAL GEOLOGY
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/257832
推荐引用方式 GB/T 7714	Watanabe, Takahiro,Matsunaka, Tetsuya,Nakamura, Toshio,et al. Last glacial-Holocene geochronology of sediment cores from a high-altitude Tibetan lake based on AMS C-14 dating of plant fossils: Implications for paleoenvironmental reconstructions[J]. 中国科学院青藏高原研究所,2010,277(1-2).
APA	Watanabe, Takahiro.,Matsunaka, Tetsuya.,Nakamura, Toshio.,Nishimura, Mitsugu.,Izutsu, Yasuhiro.,...&Zhu, Liping.(2010).Last glacial-Holocene geochronology of sediment cores from a high-altitude Tibetan lake based on AMS C-14 dating of plant fossils: Implications for paleoenvironmental reconstructions.CHEMICAL GEOLOGY,277(1-2).
MLA	Watanabe, Takahiro,et al."Last glacial-Holocene geochronology of sediment cores from a high-altitude Tibetan lake based on AMS C-14 dating of plant fossils: Implications for paleoenvironmental reconstructions".CHEMICAL GEOLOGY 277.1-2(2010).