干旱区生态环境知识资源中心(Arid): Statistics and spectra of turbulence under different roughness in the near-neutral atmospheric surface layer

Arid

DOI	10.1002/esp.4588
	Statistics and spectra of turbulence under different roughness in the near-neutral atmospheric surface layer
	Li, Xuebo 1,2; Bo, Tianli 1,2
通讯作者	Bo, Tianli
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2019
卷号	44 期号:7 页码:1460-1470
英文摘要	Accurate knowledge of the contacts between surface roughness and the resultant wind speed are important for climatic models, wind power meteorology, agriculture and erosion hazards especially on sand saltation in arid and semi-arid environments, where vegetation cover is scarce. In this study, synchronous measurements of three-dimensional wind speed below 5 m are carried out in three different surface roughness conditions in Minqin, China, and the difference in the turbulence statistics and the structure of the very large-scale motions (VLSMs) were revealed. The results show that the slope of the mean wind profile (MVP), the turbulent kinetic energy (TKE) and Reynolds stress increase with the surface roughness. The roughness seems to suppress the ejection events and the surface roughness will not only weaken the energy of the VLSMs, but also reduce the scale values of VLSMs near the wall. These influences may cause some changes regarding the dust transportation in streamwise and vertical directions during the sand and dust storm (SDS). That is, the decrease of the mean velocity near the ground will reduce the dust transportation in the streamwise direction and influence of the roughness on the ejection and sweep events will change the dust transportation in the vertical direction. Furthermore, the increase of roughness will weaken the scale and energy of VLSMs, which will lead to the decrease of the capacity of dust transportation. (c) 2019 John Wiley & Sons, Ltd.
英文关键词	Atmospheric surface layer Very large-scale motions Turbulent kinetic energy Dust transportation Roughness
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000469991600008
WOS关键词	LARGE-SCALE MOTIONS ; SAND TRANSPORT ; BOUNDARY-LAYER ; SEDIMENT TRANSPORT ; SHEAR-STRESS ; WIND-SPEED ; EROSION ; DESERT ; FIELD ; VEGETATION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215090
作者单位	1.Lanzhou Univ, Dept Mech, Key Lab Mech Western Disaster & Environm, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ, Dept Mech, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Xuebo,Bo, Tianli. Statistics and spectra of turbulence under different roughness in the near-neutral atmospheric surface layer[J]. 兰州大学,2019,44(7):1460-1470.
APA	Li, Xuebo,&Bo, Tianli.(2019).Statistics and spectra of turbulence under different roughness in the near-neutral atmospheric surface layer.EARTH SURFACE PROCESSES AND LANDFORMS,44(7),1460-1470.
MLA	Li, Xuebo,et al."Statistics and spectra of turbulence under different roughness in the near-neutral atmospheric surface layer".EARTH SURFACE PROCESSES AND LANDFORMS 44.7(2019):1460-1470.