气候变化领域集成服务门户(CCPortal): Study of Aerodynamic Grain Entrainment in Aeolian Transport

CCPortal

DOI	10.1029/2019GL086574
	Study of Aerodynamic Grain Entrainment in Aeolian Transport
	Li G.; Zhang J.; Herrmann H.J.; Shao Y.; Huang N.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Aeolian transport controls landform formations on Earth and other planets and crucially affects the atmospheric system. With elaborate wind tunnel measurements, we find that the aerodynamic entrainment rate follows a yet unreported exponential increase in the intermittent regime and only complies with the expected linear law for the condition of continuous entrainment. Subsequently, we propose a model accounting for the effects of turbulence on aerodynamic entrainment based on the distribution of local shear stress to describe the experimental results. We also provide evidence that aerodynamic entrainment can be an efficient way to directly induce a horizontal grain transport comparable to the steady and saturated saltation in unsaturated conditions and should not be ignored. Our findings substantially modify the present interpretation of surface erosion and bear thus important consequences on future soil protection techniques. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric movements; Shear flow; Shear stress; Soil conservation; Wind tunnels; Aeolian transport; Atmospheric systems; Entrainment rates; Exponential increase; Soil Protection; Surface erosion; Unsaturated condition; Wind tunnel measurements; Aerodynamics; aerodynamics; entrainment; eolian process; saltation; shear stress; turbulence; wind tunnel
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170275
作者单位	Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Lanzhou, China; School of Architecture, Civil, and Environmental Engineering, Swiss Federal Institute of Technology, Lausanne, Switzerland; PMMH, ESPCI, Paris, France; Department de Fisica, UFC, Fortaleza, Brazil; Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany
推荐引用方式 GB/T 7714	Li G.,Zhang J.,Herrmann H.J.,et al. Study of Aerodynamic Grain Entrainment in Aeolian Transport[J],2020,47(11).
APA	Li G.,Zhang J.,Herrmann H.J.,Shao Y.,&Huang N..(2020).Study of Aerodynamic Grain Entrainment in Aeolian Transport.Geophysical Research Letters,47(11).
MLA	Li G.,et al."Study of Aerodynamic Grain Entrainment in Aeolian Transport".Geophysical Research Letters 47.11(2020).