干旱区生态环境知识资源中心(Arid): Spatial-temporal differentiation of eolian sediments in the Yarlung Tsangpo catchment, Tibetan Plateau, and response to global climate change since the Last Glaciation

Arid

DOI	10.1016/j.geomorph.2020.107104
	Spatial-temporal differentiation of eolian sediments in the Yarlung Tsangpo catchment, Tibetan Plateau, and response to global climate change since the Last Glaciation
	Ling, Zhiyong 1,2; Yang, Shengli 2; Wang, Xin 2; Wang, Jianping 1; Xia, Dunsheng 2; Chen, Fahu2,3,4
通讯作者	Ling, Zhiyong ; Yang, Shengli
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	357
英文摘要	Eolian sediments, an important paleoenvironmental archive, are widespread in the Yarlung Tsangpo River (YTR) valley of the southern Tibetan Plateau (TP), but their chronology and spatial-temporal differentiation are poorly understood. And it is not clear whether eolian accumulation is controlled by global climate changes, or local paleoenvironment, or both. In this study, we applied quartz OSL dating to 30 eolian sediment samples (sandy loess and eolian sand) from eight profiles in the YTR catchment. Our new dates were combined with 72 previously published eolian sediment ages (OSL/TL and C-14) for the YTR catchment to analyze the response of eolian accumulation to paleoenvironmental changes. The overall dataset has eolian accumulation spanning the period from the Last Interglacial through to the Little Ice Age, ranging from 84.6 +/- 8.7 ka BP (possibly as old as 118 +/- 11 ka BP) to 0.4 +/- 0.1 ka BP, withmost occurring since the Late Glacial Period (15 ka BP), which suggests that the preservation of eolian deposits is controlled by geologic recirculation. Probability density function distributions (PDFs) of eolian ages from different parts of the YTR catchment show different age clusters, suggesting that factors controlling eolian accumulation vary across the catchment, so that spatial-temporal disparities are inherent in the system. To investigate the effect of regional and global paleoclimate since the Last Glacial Maximum(LGM) on eolian deposition processes in the YTR, we compared the PDF of ages fromthe combined dataset with a range of paleoclimate proxies. The PDF shows significant fluctuations since the LGM, including the Younger Dryas cold event. There is no consistent eolian sediment response to changes of the 30 degrees N summer insolation, Asian SummerMonsoon, and westerlies. Phases of strong eolian sediment accumulation in the YTR basin do not show a simple correspondence with the classical global climate curve, suggesting that eolian processes in the alpine valley environment may be modified by local responses to these changes. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Eolian sediments Quartz luminescence dating Spatial-temporal differentiation Paleoenvironment Yarlung Tsangpo valley
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000527306200009
WOS关键词	LAKE ; LUMINESCENCE ; DYNAMICS ; HOLOCENE ; PLEISTOCENE ; EVOLUTION ; MONSOON ; DESERT ; MOISTURE ; QINGHAI
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319112
作者单位	1.Chinese Acad Sci, Key Lab Comprehens & Highly Efficient Utilizat Sa, Qinghai Prov Key Lab Geol & Environm Salt Lake, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China; 2.Lanzhou Univ, Coll Earth & Environm Sci, Key Lab West Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China; 3.Chinese Acad Sci, Key Lab Alpine Ecol, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Chinese Acad Sci, Inst Tibetan Plateau Mee, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Ling, Zhiyong,Yang, Shengli,Wang, Xin,et al. Spatial-temporal differentiation of eolian sediments in the Yarlung Tsangpo catchment, Tibetan Plateau, and response to global climate change since the Last Glaciation[J]. 兰州大学,2020,357.
APA	Ling, Zhiyong,Yang, Shengli,Wang, Xin,Wang, Jianping,Xia, Dunsheng,&Chen, Fahu.(2020).Spatial-temporal differentiation of eolian sediments in the Yarlung Tsangpo catchment, Tibetan Plateau, and response to global climate change since the Last Glaciation.GEOMORPHOLOGY,357.
MLA	Ling, Zhiyong,et al."Spatial-temporal differentiation of eolian sediments in the Yarlung Tsangpo catchment, Tibetan Plateau, and response to global climate change since the Last Glaciation".GEOMORPHOLOGY 357(2020).