干旱区生态环境知识资源中心(Arid): Morphological characteristics and dynamic changes of seif dunes in the eastern margin of the Kumtagh Desert, China

Arid

DOI	10.1007/s40333-020-0099-1
	Morphological characteristics and dynamic changes of seif dunes in the eastern margin of the Kumtagh Desert, China
	Pang Yingjun; Wu Bo; Li Yonghua; Xie Shengbo
通讯作者	Pang, YJ (corresponding author), Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China. ; Pang, YJ (corresponding author), State Adm Forestry & Grassland, Key Lab Desert Ecosyst & Global Change, Beijing 100091, Peoples R China.
来源期刊	JOURNAL OF ARID LAND
ISSN	1674-6767
EISSN	2194-7783
出版年	2020
卷号	12 期号:5 页码:887-902
英文摘要	The seif dune field over the gravel desert surface in the eastern margin of the Kumtagh Desert is a valuable experimental site for the observation of dune formation and dynamics. We used high-resolution remote sensing and station observation approaches, combined with wind and grain size data, to study the characteristics of the aeolian environment and the morphologies of and dynamic changes in seif dunes. We observed the ratio of the resultant drift potential (RDP) to the drift potential (DP), which was 0.37, associated with an obtuse bimodal wind regime. The drift potentials in the west-northwest (WNW) and east-northeast (ENE) directions were dominant, and the angle between the two primary DP directions was 135.00 degrees. The dune orientations ranged from 168.75 degrees-213.75 degrees, which were parallel to the resultant drift direction (186.15 degrees). The dune lengths ranged from 51.68 to 1932.11 m with a mean value of 344.91 m. The spacings of the dunes ranged from 32.34 to 319.77 m with a mean value of 93.39 m. The mean grain size of the sediments became finer, and the sorting became better from upwind tail to downwind tip, which indicated that the sediment of the seif dunes in the study region may be transported from northward to southward. The rate of increase in the length, the mean longitudinal migration rate of the dune tail, and the mean longitudinal extension rate of the dune tip (also called elongation rate) were 4.93, 4.63, and 9.55 m/a, respectively. The mean lateral migration vector of the seif dunes was approximately 0.11 m/a towards the west (-0.11 m/a), while the mean amplitude of lateral migration was 0.53 m/a, ignoring the direction of lateral migration. We found that the seif dune field formed first beside seasonal rivers, which can provide sediment, and then expanded downwind.
英文关键词	seif dune Kumtagh Desert elongation migration drift potential
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000601529900013
WOS关键词	LONGITUDINAL DUNES ; LINEAR DUNES ; BARCHAN ; ORIGIN ; BASIN
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348971
作者单位	[Pang Yingjun; Wu Bo; Li Yonghua] Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China; [Pang Yingjun; Wu Bo] State Adm Forestry & Grassland, Key Lab Desert Ecosyst & Global Change, Beijing 100091, Peoples R China; [Li Yonghua] State Adm Forestry & Grassland, Kumtagh Desert Ecosyst Res Stn, Dunhuang 736200, Peoples R China; [Xie Shengbo] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Pang Yingjun,Wu Bo,Li Yonghua,et al. Morphological characteristics and dynamic changes of seif dunes in the eastern margin of the Kumtagh Desert, China[J],2020,12(5):887-902.
APA	Pang Yingjun,Wu Bo,Li Yonghua,&Xie Shengbo.(2020).Morphological characteristics and dynamic changes of seif dunes in the eastern margin of the Kumtagh Desert, China.JOURNAL OF ARID LAND,12(5),887-902.
MLA	Pang Yingjun,et al."Morphological characteristics and dynamic changes of seif dunes in the eastern margin of the Kumtagh Desert, China".JOURNAL OF ARID LAND 12.5(2020):887-902.