The limited influence of glaciations in Tibet on global climate over the past 170 000 yr

doi:10.1016/S0012-821X(01)00573-8

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（1985-2004）

	The limited influence of glaciations in Tibet on global climate over the past 170 000 yr
	Schafer, JM; Tschudi, S; Zhao, ZZ; Wu, XH; Ivy-Ochs, S; Wieler, R; Baur, H; Kubik, PW; Schluchter, C
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2002-01-15
卷号	194 期号:3-4 页码:287-297
关键词	Xizang China exposure age monsoons paleoclimatology glaciation
DOI	10.1016/S0012-821X(01)00573-8
文献子类	Article
英文摘要	Extensive ice cover on the Tibetan Plateau would significantly influence Earth's climate in general and the Asian monsoon system in particular, but extent and timing of Quaternary glaciations in Tibet remain highly controversial. We dated erratics on top of moraines in the climatic key areas of Central and East Tibet using cosmogenic Be-10, Al-26, and Ne-21. Consistent exposure ages obtained by various nuclides indicate a continuous period of exposure since the deposition of the samples. Our data imply that glacial advances were restricted to a few 10 km during the last 170 kyr in Central Tibet and during the peak of the last glaciation (similar to24-13 kyr ago) in Eastern Tibet. Advances of Tibetan glaciers were much less prominent than elsewhere in the northern hemisphere most likely due to very and conditions and high sublimation rates. A proposed ice-dome covering the entire Plateau can be excluded. Thus, albedo increase of Tibet most likely did trigger neither northern hemisphere ice ages nor paleomonsoon changes during the last two glacial cycles. The glacial advance during Marine Isotope Stage 2 in East Tibet and the absence of significant glacial events during the Holocene suggest a relation of snowline lowering in East Tibet to North Atlantic cooling events rather than to periods of high precipitation by an intensified monsoon. (C) 2002 Elsevier Science B.V. All rights reserved.
学科主题	Geochemistry & Geophysics
WOS关键词	EAST-ASIAN MONSOON ; PRODUCTION-RATES ; COSMOGENIC NUCLIDES ; LAST GLACIATION ; ICE-SHEET ; NEON ; SURFACES ; PAKISTAN ; STAGE-2 ; PLATEAU
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000173610300001
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/11869]
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Schafer, JM,Tschudi, S,Zhao, ZZ,et al. The limited influence of glaciations in Tibet on global climate over the past 170 000 yr[J]. EARTH AND PLANETARY SCIENCE LETTERS,2002,194(3-4):287-297.
APA	Schafer, JM.,Tschudi, S.,Zhao, ZZ.,Wu, XH.,Ivy-Ochs, S.,...&Schluchter, C.(2002).The limited influence of glaciations in Tibet on global climate over the past 170 000 yr.EARTH AND PLANETARY SCIENCE LETTERS,194(3-4),287-297.
MLA	Schafer, JM,et al."The limited influence of glaciations in Tibet on global climate over the past 170 000 yr".EARTH AND PLANETARY SCIENCE LETTERS 194.3-4(2002):287-297.