干旱区生态环境知识资源中心(Arid): Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China

Arid

DOI	10.1016/j.catena.2020.104469
	Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China
	Shen, Yaping 1; Zhang, Chunlai 1; Wang, Rende 2; Wang, Xuesong 1; Cen, Songbo 1; Li, Qing 2
通讯作者	Zhang, Chunlai
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	188
英文摘要	Studies have previously discussed characteristics of aeolian activity for different gravel densities on gobi surfaces. However, the significance of the spatial heterogeneity of its surface to sand flow over its surface and to dust emissions from the region has not been clearly demonstrated. This is also the case for spatial variation in the aeolian environment. Accordingly, this study established two observation transects, both through the desert pavement area and the dune field in the gobi desert region of northwest China, to measure surface sediment grain size, wind speed and sand transport along these transects. Results showed that in areas where surface gravel content decreased and mobile sand dunes increased, surface sediments were better sorted and grain-size distribution changed from multimodal to roughly unimodal. Furthermore, sand transport increased significantly and properties of aeolian activity varied markedly within a short distance. This extreme variation in both grainsize parameters and in sand transport indicated that strong spatial heterogeneity exists in the aeolian environment of the study area. Furthermore, dune fields within gobi area are likely the main cause of sand flow over its surface as well as dust emissions from the region itself. The findings in this study have universal applicability in gobi regions with uneven surface properties in other arid areas.
英文关键词	Desert pavements Sand transport Aeolian environment Spatial heterogeneity
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000518488500039
WOS关键词	MOGAO GROTTOES ; WIND ; SAND ; ROUGHNESS ; DUNHUANG ; DRAG ; TRANSPORT ; LENGTH ; FLUX
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314241
作者单位	1.Beijing Normal Univ, Fac Geog Sci, MOE Engn Res Ctr Desertificat & Blown Sand Contro, State Key Lab Earth Surface Proc & Resource Ecol, 19 Xinjiekouwai St, Beijing 100875, Peoples R China; 2.Hebei Acad Sci, Inst Geog Sci, Shijiazhuang 050021, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Shen, Yaping,Zhang, Chunlai,Wang, Rende,et al. Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China[J]. 北京师范大学,2020,188.
APA	Shen, Yaping,Zhang, Chunlai,Wang, Rende,Wang, Xuesong,Cen, Songbo,&Li, Qing.(2020).Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China.CATENA,188.
MLA	Shen, Yaping,et al."Spatial heterogeneity of surface sediment grain size and aeolian activity in the gobi desert region of northwest China".CATENA 188(2020).