干旱区生态环境知识资源中心(Arid): Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert

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DOI	10.1016/j.aeolia.2021.100710
	Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert
	Xiao, Jianhua; Xie, Xiaosong; Zhao, Hui; Chen, Can; Ma, Xixi; Qu, Jianjun; Yao, Zhengyi
通讯作者	Yao, ZY (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2021
卷号	51
英文摘要	The morphology of small longitudinal dunes responded clearly to wind fields in the northeastern Rub'al Khali Desert. Based on local meteorological data and high-resolution satellite images, we analyzed the wind regime, drift potential (DP), dune morphology changes, and migration rates. The wind roses revealed that two opposing winds (from the northwest and southeast), both at an oblique angle to the dune crest, dominated the structure of the wind regime, with periodic changes between these directions. The annual DP from 2017 to 2019 ranged from 615 to 688 vector units (VU), and the resultant drift potential (RDP) ranged from 149 to 311 VU, indicating a high-energy wind environment. The most erosive winds (DP > 60 VU) occurred from February to June. Controlled by the wind field, dune morphology remained longitudinal from September to May. However, small longitudinal dunes (height below 5 m) transformed into transverse dunes from June to August, and formed a dune network with the large longitudinal dunes. On flat land, a series of active longitudinal dunes migrated at 7.8 to 15.1 m yr(-1), with a mean of 11.9 m yr(-1). Their dominant migration mode was parallel to the resultant drift direction (RDD), with the dunes extending downwind via accretion at the downwind ends. These dunes also migrate laterally by 0.4 to 0.8 m yr(-1) while maintaining a symmetrical longitudinal dune morphology. These results expand our knowledge of dune migration and evolution, and provide guidance for protecting areas such as oases threatened by migrating dunes.
英文关键词	Longitudinal dunes Dune morphology Dune migration Rub'al Khali Desert
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000662685200005
WOS关键词	AL-KHALI ; MORPHOLOGICAL VARIABILITY ; SIMPSON-DESERT ; WIND REGIMES ; SEIF DUNES ; SAND DUNES ; WESTERN ; TITAN ; FIELD ; EDGE
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349301
作者单位	[Xiao, Jianhua; Ma, Xixi; Qu, Jianjun; Yao, Zhengyi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Xie, Xiaosong; Zhao, Hui; Chen, Can] Shanghai Elect Power Generat Engn Co, Shanghai 201612, Peoples R China
推荐引用方式 GB/T 7714	Xiao, Jianhua,Xie, Xiaosong,Zhao, Hui,et al. Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert[J],2021,51.
APA	Xiao, Jianhua.,Xie, Xiaosong.,Zhao, Hui.,Chen, Can.,Ma, Xixi.,...&Yao, Zhengyi.(2021).Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert.AEOLIAN RESEARCH,51.
MLA	Xiao, Jianhua,et al."Seasonal changes and migration of longitudinal dunes in the northeastern Rub'al Khali Desert".AEOLIAN RESEARCH 51(2021).