Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL082195 |
Cohesion-Induced Enhancement of Aeolian Saltation | |
Comola, F.1,2; Gaume, J.1,3; Kok, J. F.2; Lehning, M.1,3 | |
2019-05-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:10页码:5566-5574 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | The wind-driven saltation of granular material plays a key role in various geophysical processes on Earth, Mars, Venus, and Titan. Although interparticle cohesion is known to limit the number of grains lifted from the surface through aerodynamic entrainment and granular splash, the role of cohesion in the development of saltation from onset to steady state is still poorly understood. Using a numerical model based on the discrete element method, we show that saltation over cohesive beds sustains itself at wind speeds 1 order of magnitude smaller than those necessary to initiate it, giving rise to hysteresis in which the occurrence of transport depends on the history of the wind. Our results further suggest that saltation over cohesive beds requires much longer distances to saturate, thereby increasing the size of the smallest stable bed forms. These findings have implications for dune formation, dust emission, and snow sublimation over cohesive beds. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000471237500062 |
WOS关键词 | TURBULENT-FLOW ; SNOW ; SAND ; GRAIN ; COLLISIONS ; BED ; MODEL ; SIMULATIONS ; ENTRAINMENT ; INITIATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183425 |
专题 | 气候变化 |
作者单位 | 1.Swiss Fed Inst Technol, Sch Architecture Civil & Environm Engn, Lausanne, Switzerland; 2.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; 3.WSL Inst Snow & Avalanche Res, SLF, Davos, Switzerland |
推荐引用方式 GB/T 7714 | Comola, F.,Gaume, J.,Kok, J. F.,et al. Cohesion-Induced Enhancement of Aeolian Saltation[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(10):5566-5574. |
APA | Comola, F.,Gaume, J.,Kok, J. F.,&Lehning, M..(2019).Cohesion-Induced Enhancement of Aeolian Saltation.GEOPHYSICAL RESEARCH LETTERS,46(10),5566-5574. |
MLA | Comola, F.,et al."Cohesion-Induced Enhancement of Aeolian Saltation".GEOPHYSICAL RESEARCH LETTERS 46.10(2019):5566-5574. |
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