干旱区生态环境知识资源中心(Arid): Nebkha dune morphology in the gobi deserts of northern China and potential implications for dust emission

Arid

DOI	10.1111/sed.12769
	Nebkha dune morphology in the gobi deserts of northern China and potential implications for dust emission
	Zhang, Zhengcai; Han, Lanying; Pan, Kaijia; Dong, Zhibao; Liang, Aimin; Nan, Ling; Li, Xingcai; Xiao, Nan; Li, Chao
通讯作者	Zhang, ZC
来源期刊	SEDIMENTOLOGY
ISSN	0037-0746
EISSN	1365-3091
出版年	2020
卷号	67 期号:7 页码:3769-3782
英文摘要	Nebkhas (coppice dunes) have formed throughout the gobi desert regions of China in response to the decreased near-surface wind speed caused by vegetation, combined with deposition of aeolian sediment in and around the vegetation. Although nebkhas have been extensively studied on several land surfaces, they have not yet been fully described where they form in areas of gobi desert. Based on field investigations of nebkha morphology and adjacent land surface sediment content on and inside the surface of these dunes, the following were found: (i) the nebkhas that develop in gobi deserts consist of two types - dunes with or without a depositional tail (a shadow dune); (ii) the nebkhas in the area of gobi desert were smaller than those found in sandy deserts, oases, or other areas with a rich sediment source, with a mean height of 0.28 m, mean width 1.63 m and mean length 1.34 m; and (iii) the dune height, length and width were significantly positively linearly related to the vegetation height, length and width. These patterns were similar at all four of the study sites, but the relationships with dune width differed among the sites. The average particle-size distributions on and inside the vegetation did not differ between the four sites. However, significant spatial differences in the sediments on and inside the dunes indicate that nebkhas can capture both local and distant sediments driven by the wind. These findings suggest a potential role of nebkhas in dust emission, although this role must be confirmed in future research.
英文关键词	Dust emission gobi desert nebkhas northern China sediment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000547287800001
WOS关键词	WIND EROSION ; AIR-FLOW ; LAND DEGRADATION ; SAND ; SEDIMENT ; RECOVERY ; SINGLE ; TUNNEL ; LEE ; INDICATORS
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324998
作者单位	[Zhang, Zhengcai; Pan, Kaijia; Liang, Aimin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Han, Lanying] Chinese Meteorol Adm, Northwest Reg Climate Ctr, Lanzhou 730020, Peoples R China; [Dong, Zhibao; Xiao, Nan; Li, Chao] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Peoples R China; [Nan, Ling] Tianshui Normal Univ, Sch Resources & Environm Engn, Tianshui 741001, Peoples R China; [Li, Xingcai] Ningxia Univ, Sch Phys & Elect Elect Engn, Ningxia Key Lab Intelligent Sensing Desert Inform, Yinchuan 750021, Ningxia, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhengcai,Han, Lanying,Pan, Kaijia,et al. Nebkha dune morphology in the gobi deserts of northern China and potential implications for dust emission[J],2020,67(7):3769-3782.
APA	Zhang, Zhengcai.,Han, Lanying.,Pan, Kaijia.,Dong, Zhibao.,Liang, Aimin.,...&Li, Chao.(2020).Nebkha dune morphology in the gobi deserts of northern China and potential implications for dust emission.SEDIMENTOLOGY,67(7),3769-3782.
MLA	Zhang, Zhengcai,et al."Nebkha dune morphology in the gobi deserts of northern China and potential implications for dust emission".SEDIMENTOLOGY 67.7(2020):3769-3782.