干旱区生态环境知识资源中心(Arid): The southern boundary of the Mu Us Sand Sea and its controlling factors

Arid

DOI	10.1016/j.geomorph.2021.108010
	The southern boundary of the Mu Us Sand Sea and its controlling factors
	Wang, Zhongyuan; Wu, Yongqiu; Li, Dawei; Fu, Tianyang
通讯作者	Wu, YQ (corresponding author), Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Zhejiang, Peoples R China.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2022
卷号	396
英文摘要	Boundaries are important spatial attributes of sand seas. Recognizing the accurate location of these boundaries forms not only the basis of regional aeolian geomorphological research but also the premise of quantifying spatial changes in typical climatic epochs. Identifying the factors controlling boundary locations is beneficial for understanding their formation and evolution. While the boundary of sand seas was an ambiguous concept in previous studies, few studies have posed extraction rules and presented the definite position of a given sand sea. Based on the geomorphic map of Mu Us, which has a scale of 1:250,000, and according to the '50% sand cover' principle, this study quantitatively extracted the southern boundary of the Mu Us Sand Sea and investigated its controlling factors by analysing the geomorphology and grain size change along the margin and the history of aeolian activities outside of Mu Us from two sites. The results reveal the following: climatic features of northern China determine the spatial extent to which sand seas can occur, while the location of the Mu Us Sand Sea southern boundary is mainly controlled by topography. Dune construction occurred outside of the Mu Us Sand Sea under suitable topography, and the outside response of aeolian activity to climate change was also similar to that in the inner Mu Us. The southern and southeastern Mu Us is bounded by river valleys and loess landforms. Deeply incised and high-density gullies effectively limit sand transport, and the topography of loess landforms is unsuitable for aeolian sand preservation. In the southwestern Mu Us, outcropping groundwater at the edge of the alluvial fan at the Baiyu Mountain front impedes the downwind transport of saltating sand. As a consequence, the Sand Sea terminates at the extensive lacustrine landform in this area. In addition, the distribution of the localized dune provenance from immediate sources in margin areas may cause slight boundary location changes. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Mu Us Sand Sea Boundary Dune Loess gully
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000718563800003
WOS关键词	GRAIN-SIZE CHARACTERISTICS ; NORTHERN CHINA ; EOLIAN SAND ; DUNE FIELD ; DESERT ; FLOW ; GEOMORPHOLOGY ; ENVIRONMENT ; MODEL ; BELT
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374441
作者单位	[Wang, Zhongyuan; Li, Dawei; Fu, Tianyang] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China; [Wu, Yongqiu] Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhongyuan,Wu, Yongqiu,Li, Dawei,et al. The southern boundary of the Mu Us Sand Sea and its controlling factors[J],2022,396.
APA	Wang, Zhongyuan,Wu, Yongqiu,Li, Dawei,&Fu, Tianyang.(2022).The southern boundary of the Mu Us Sand Sea and its controlling factors.GEOMORPHOLOGY,396.
MLA	Wang, Zhongyuan,et al."The southern boundary of the Mu Us Sand Sea and its controlling factors".GEOMORPHOLOGY 396(2022).