Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor

doi:10.3389/feart.2021.728202

	Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor
	Zhu, Bing-Qi 1; Zhang, Jia-Xing 1,2; Sun, Chun 1,2
刊名	FRONTIERS IN EARTH SCIENCE
	2021-08-17
卷号	9 页码:24
关键词	sand dunes and gobi sediments geomorphological dynamics grain size sedimentology major- and trace-elements geochemistry sediment provenance desertification Hexi Corridor middle-latitude desert
DOI	10.3389/feart.2021.728202
通讯作者	Zhu, Bing-Qi(zhubingqi@igsnrr.cn)
英文摘要	Dynamic changes of aeolian landforms under changing environments in a middle-latitude desert belt is a typical problem of climate change and related landscape response. It need a comprehensive understanding of the formation mechanisms of dune landforms with the supply of material suitable for aeolian transport and favorable conditions of sediment availability and wind regimes in the region. Based on comprehensive evidences from geomorphological, sedimentological, geochemical, and hydrological analysis, this study discussed the dynamical changes of different dune landforms during the past half century and their provenance in the Hexi Corridor, China. The results show that there are two states of sand dunes movement in the Hexi Corridor in the past half century, dynamic migration and basically stable. The crescent-shaped dunes move the fastest, followed by the chains of barchan dunes. Only the top of the pyramid dunes wigwags, while the parabolic dunes and the longitudinal dunes hardly move forward. The moving speed of sand dunes is positively correlated with the wind speed >= 5 m/s at a yearly scale. The grain size of sand dunes in the western Hexi Corridor is coarser than that in the central-eastern part, and also larger than those in other deserts of northern China and of the world. Different motion modes of saltation, suspension, and creeping are identified between aeolian, alluvial/fluvial and gobi sediments. Dune sands are mainly "sediments of in-situ rising" that originated from alluvial/fluvial/lacustrine deposits of ancient rivers, lakes, and aeolian deposits in the erosion zone of the forelands of the Qilian and Beishan Mountains and the north-neighboring deserts. This reveals a significance interaction between wind and water dynamics in the formation and evolution of aeolian landforms in the arid study area. Sufficient transport capacity is evidenced for both the western and eastern parts of the Hexi Corridor, sufficient sand supply and sand availability, however, is the favorable factor for dune formation in the east part but is the limiting factor for the west.
资助项目	National Natural Science Foundation of China[41930640] ; National Natural Science Foundation of China[41771014] ; Project of the Second Comprehensive Scientific Investigation on the Qinghai Tibet Plateau[2019QZKK1003]
WOS关键词	QUATERNARY ENVIRONMENTAL-CHANGES ; QILIAN SHAN CHINA ; GRAIN-SIZE ; MOJAVE DESERT ; AGGREGATE STABILITY ; NEBKHA DEVELOPMENT ; TAKLAMAKAN DESERT ; AEOLIAN SEDIMENTS ; LAND DEGRADATION ; TIBETAN PLATEAU
WOS研究方向	Geology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000695926800001
资助机构	National Natural Science Foundation of China ; Project of the Second Comprehensive Scientific Investigation on the Qinghai Tibet Plateau
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165554]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhu, Bing-Qi
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Bing-Qi,Zhang, Jia-Xing,Sun, Chun. Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor[J]. FRONTIERS IN EARTH SCIENCE,2021,9:24.
APA	Zhu, Bing-Qi,Zhang, Jia-Xing,&Sun, Chun.(2021).Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor.FRONTIERS IN EARTH SCIENCE,9,24.
MLA	Zhu, Bing-Qi,et al."Physiochemical Characteristics, Provenance, and Dynamics of Sand Dunes in the Arid Hexi Corridor".FRONTIERS IN EARTH SCIENCE 9(2021):24.