干旱区生态环境知识资源中心(Arid): Long-term measurements of aeolian transport directional variations over a zibar surface in the northern Kumtagh Sand Sea

Arid

DOI	10.1016/j.geomorph.2020.107452
	Long-term measurements of aeolian transport directional variations over a zibar surface in the northern Kumtagh Sand Sea
	Qian, Guangqiang; Yang, Zhuanling; Dong, Zhibao; Luo, Wanyin; Zhang, Zhengcai; Lu, Junfeng
通讯作者	Qian, GQ
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	371
英文摘要	Zibars are aeolian bedforms created by armoring of the surface by coarse grains. The existence and movement of these grains strongly influence zibar morphodynamics. Although aeolian sediment transport has been investi-gated for arid surface processes with a range of grain sizes, the measurement durations were short, making it difficult to establish the relationship between microscopic aeolian transport processes and macroscopic geomorphological processes. In the present study, we conducted field observations of aeolian sediment transport above a zibar in northern China's Kumtagh Sand Sea with a segmented sand trap. During six measurement periods throughout 2014, the sampler collected 314.76 kg of sediments within 1 m above the ground. The directional variation indicated that about 52.5% of the sediments came from the north, northeast, and northwest; the southeast provided the least sediments. The strongest aeolian transport occurred between August and October; the weakest was in winter. The aeolian sediment flux decreased with height, and 54% of particles were transported within 0.1 m above the ground. The transport profiles fit an exponential decay function. The flux's directional variation resulted from the combined effects of sediment availability and wind regime, so the calculated net transport differed from the drift potential. The seasonal and directional variations of aeolian transport significantly affect the morphodynamic process of zibars. The trend and the internal sedimentary structure of zibars were closely related to the aeolian transport process. (c) 2020 Elsevier B.V. All rights reserved.
英文关键词	Aeolian transport Sand trap Zibar Kumtagh Sand Sea
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591681200007
WOS关键词	SEDIMENT TRANSPORT ; FLUX PROFILES ; MASS FLUX ; DUNE ; DESERT ; EFFICIENCY ; MAGNITUDE ; FREQUENCY ; MOVEMENT ; DYNAMICS
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/2XILL650/327603
作者单位	[Qian, Guangqiang; Luo, Wanyin; Zhang, Zhengcai; Lu, Junfeng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, 322 West Donggang Rd, Lanzhou 730000, Gansu, Peoples R China; [Yang, Zhuanling] Guizhou Educ Univ, Sch Geog & Resources, Guiyang, Peoples R China; [Dong, Zhibao] Shaanxi Normal Univ, Sch Geog & Tourism, Xian, Peoples R China
推荐引用方式 GB/T 7714	Qian, Guangqiang,Yang, Zhuanling,Dong, Zhibao,et al. Long-term measurements of aeolian transport directional variations over a zibar surface in the northern Kumtagh Sand Sea[J],2020,371.
APA	Qian, Guangqiang,Yang, Zhuanling,Dong, Zhibao,Luo, Wanyin,Zhang, Zhengcai,&Lu, Junfeng.(2020).Long-term measurements of aeolian transport directional variations over a zibar surface in the northern Kumtagh Sand Sea.GEOMORPHOLOGY,371.
MLA	Qian, Guangqiang,et al."Long-term measurements of aeolian transport directional variations over a zibar surface in the northern Kumtagh Sand Sea".GEOMORPHOLOGY 371(2020).