干旱区生态环境知识资源中心(Arid): A new aeolian activity proxy based on analysis of the grain size characteristics of surface soils across the Tengger Desert, northwest China, and its application to a Quaternary aeolian succession

Arid

DOI	10.1016/j.palaeo.2023.111594
	A new aeolian activity proxy based on analysis of the grain size characteristics of surface soils across the Tengger Desert, northwest China, and its application to a Quaternary aeolian succession
	Liu, Bing; Zhao, Hui; Yang, Fan; Liang, Aiming; Sun, Aijun; Niu, Qinghe; Li, Sen
通讯作者	Zhao, H
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2023
卷号	622
英文摘要	The arid regions of northwestern China are dominated by extensive areas of mobile sand dunes. These features cause environmental problems and exert global climatic impacts; however, due to the lack of systematicallyapplied indicators of aeolian activity, direct evidence of past changes in aeolian activity is unreliable, especially for aeolian sand source regions. In this paper, we analyze the end-member (EM) distributions of various types of surface soil across the Tengger Desert in northwestern China, and devise a sensitive proxy for aeolian activity using a spatio-temporal substitution approach. This proxy is then used to evaluate a Quaternary aeolian succession and to understand the response of aeolian activity to regional climate change. Our results suggest that gradual increases in the coarse-grained EM components 3-5 reflect enhanced dune mobility and reduced vegetation coverage, which are a direct function of the intensity of regional aeolian activity. In the aeolian section, coarse- and medium-grained sand layers resemble modern semi-mobile and mobile dunes, whereas finegrained sand layers are analogous to vegetated fixed/semi-fixed or semi-mobile dunes. Combining this record with independent multi-proxy evidence from the same section leads us to conclude that strong aeolian activity coincided with a dry climate, sparse vegetation cover, and strong surface winds during the Last Glacial Maximum, and that these conditions gradually attenuated at the beginning of the Last Deglacial. These inferences are in accord with independent paleoclimate records from this region, confirming that the intensity of aeolian activity in the southeastern Tengger Desert is closely associated with large-scale climate change. Our findings show that our EM proxy can be used to infer the intensity of aeolian activity and to reliably reconstruct the evolution of deserts in northwestern China.
英文关键词	Surface soil EM analysis Aeolian activity Spatio-temporal substitution Tengger Desert
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001012736000001
WOS关键词	QINGHAI-TIBETAN PLATEAU ; DUST SOURCE AREA ; MU US DESERT ; NORTHERN CHINA ; CLIMATE-CHANGE ; DUNE MOBILITY ; RECORD ; DEPOSITS ; LUMINESCENCE ; LAKE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397961
推荐引用方式 GB/T 7714	Liu, Bing,Zhao, Hui,Yang, Fan,et al. A new aeolian activity proxy based on analysis of the grain size characteristics of surface soils across the Tengger Desert, northwest China, and its application to a Quaternary aeolian succession[J],2023,622.
APA	Liu, Bing.,Zhao, Hui.,Yang, Fan.,Liang, Aiming.,Sun, Aijun.,...&Li, Sen.(2023).A new aeolian activity proxy based on analysis of the grain size characteristics of surface soils across the Tengger Desert, northwest China, and its application to a Quaternary aeolian succession.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,622.
MLA	Liu, Bing,et al."A new aeolian activity proxy based on analysis of the grain size characteristics of surface soils across the Tengger Desert, northwest China, and its application to a Quaternary aeolian succession".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 622(2023).