Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau

doi:10.1016/j.yqres.2004.09.012

	Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau
	Jin, ZD ; Wu, YH ; Zhang, XH ; Wang, SM
刊名	QUATERNARY RESEARCH
	2005-03-01
卷号	63 期号:2 页码:161-170
关键词	Chemical Weathering Lake Sediment Climate Change Central Tibetan Plateau
ISSN号	0033-5894
DOI	10.1016/j.yqres.2004.09.012
文献子类	Article
英文摘要	The lightness (L*) and concentrations of Rb, Sr and organic carbon (C-org) have been measured in the age-constrained lake sediment cores recovered from Co Ngoin in the central Tibetan Plateau. Dissolved Sr flux is a dominant control on the variation of Rb/Sr ratios in the sediments. Variations in color and geochemical proxies of Co Ngoin sediments display a continuous history of late glacial to mid-Holocene chemical versus physical weathering intensity in response to past climatic changes between approximately 13,500 and 4500 cal yr B.P. A lower chemical weathering under a late glacial climate was followed by a higher weathering during the Holocene Optimum. Weathering intensity in the central Tibetan Plateau catchment also responds to well-known climatic events, such as the Younger Dryas (YD), and possibly the Holocene Event 5 (HE-5). Although there are differences in time or duration of the climatic events, many of the well-known late glacial to mid-Holocene events occurred in high-elevation Co Ngoin where atmospheric circulation might play a hemispherical role in climatic forcing. The sediment hiatus since c. 4200 C-14 yr B.P. in the Co Ngoin indicates a period of desiccation that was probably associated with a sharp decrease in summer monsoon strength. Our lascustrine results not only imply catchment weathering variations in response to late glacial to mid-Holocene climatic conditions in the central plateau, but also provide further evidence for global connections between regional climates. (c) 2004 University of Washington. All rights reserved.
WOS关键词	NORTH-ATLANTIC CIRCULATION ; BASIN WESTERN TIBET ; SEQUENTIAL EXTRACTION ; LAKE-SEDIMENTS ; SUMXI CO ; YR BP ; HOLOCENE ; RECORD ; CHINA ; COLOR
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000227574100005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65762]
专题	中国科学院地质与地球物理研究所
通讯作者	Jin, ZD
作者单位	1.Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geog & Limnol, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Jin, ZD,Wu, YH,Zhang, XH,et al. Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau[J]. QUATERNARY RESEARCH,2005,63(2):161-170.
APA	Jin, ZD,Wu, YH,Zhang, XH,&Wang, SM.(2005).Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau.QUATERNARY RESEARCH,63(2),161-170.
MLA	Jin, ZD,et al."Role of late glacial to mid-Holocene climate in catchment weathering in the central Tibetan Plateau".QUATERNARY RESEARCH 63.2(2005):161-170.