干旱区生态环境知识资源中心(Arid): Holocene climatic change reconstructed from trace elements of an aeolian deposit in the southeastern Mu Us Desert, northern China

Arid

DOI	10.3724/SP.J.1226.2019.00126
	Holocene climatic change reconstructed from trace elements of an aeolian deposit in the southeastern Mu Us Desert, northern China
	Liu, Bing; Jin, HeLing; Sun, LiangYing; Xue, WenPing; Liu, ZhenYu
通讯作者	Liu, B
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2019
卷号	11 期号:2 页码:126-138
英文摘要	In semi-arid and arid desert regions of northern China, aeolian deposits document the framework variation of an Asian monsoon during the late Quaternary. However, there is still a lack of detailed data pertaining to Holocene Asian monsoonal variation especial in the modern Asian summer monsoonal boundary belt. In this study, we reconstructed Holocene millennial-scale climatic changes in the Mu Us Desert, northern China, through systematic analysis of the variation of trace elements (324 samples) in different lithological units of the palaeosol-aeolian sand deposit, in combination with C-14 and OSL chronology. Statistical results, correlation and clustering analysis indicate that the high content of 11 trace elements (V, Y, Cr, Nb, P, Mn, Cu, Zr, As, Ni and Rb, represented by P) and lower Sr content corresponding to periods of palaeosol development, marked increase of vegetation, weathering degree, and enhanced Asian summer monsoonal strength. In contrast, their opposed variation arc coincident with accumulated aeolian sand layers, implying weaker summer monsoons and less geochemical weathering and degraded vegetation. These associations can be considered as signaling regional humid and dry changes of the Holocene environment. Accordingly, relatively arid conditions dominated the region before 7.2 ka, and there was an optimal humid climate in 7.2-4.6 ka. Afterwards, the climate became obviously dry, accompanied with several cycles of relatively wet and dry, such as relatively wet intervals around 4.1-3.7 ka, 3.5-3.3 ka and 2.5 ka. In addition, six millennial-scale dry events were recorded, and these events were consistent with weaker Asian summer monsoonal intervals in low latitudes, declined palaeosol development and precipitation in middle latitudes, as well as increased winter monsoon and periodic ice-rafting events in high latitudes of the Northern Hemisphere, within limits of accuracy of existing dating ages. This possibly suggests a noteworthy synchronism between millennial-scale climatic changes in this region and on a global scale.
英文关键词	Holocene climatic change Mu Us Desert Aeolian deposit trace element synchronism
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000466177400003
WOS关键词	ATLANTIC CLIMATE ; INNER-MONGOLIA ; SUMMER MONSOON ; RIVER
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
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/2XILL650/333519
作者单位	[Liu, Bing; Jin, HeLing; Sun, LiangYing; Xue, WenPing; Liu, ZhenYu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China; [Liu, Bing] Lanzhou Univ, MOE Key Lab Western China Environm Syst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bing,Jin, HeLing,Sun, LiangYing,et al. Holocene climatic change reconstructed from trace elements of an aeolian deposit in the southeastern Mu Us Desert, northern China[J]. 兰州大学,2019,11(2):126-138.
APA	Liu, Bing,Jin, HeLing,Sun, LiangYing,Xue, WenPing,&Liu, ZhenYu.(2019).Holocene climatic change reconstructed from trace elements of an aeolian deposit in the southeastern Mu Us Desert, northern China.SCIENCES IN COLD AND ARID REGIONS,11(2),126-138.
MLA	Liu, Bing,et al."Holocene climatic change reconstructed from trace elements of an aeolian deposit in the southeastern Mu Us Desert, northern China".SCIENCES IN COLD AND ARID REGIONS 11.2(2019):126-138.