DOI: 10.1002/2016JD025316
论文题名: Numerical simulation of the falling snow deposition over complex terrain
作者: Wang Z. ; Huang N.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 2 起始页码: 980
结束页码: 1000
语种: 英语
英文关键词: complex terrain
; large-eddy simulation
; mixed grain size
; nonuniform distribution
; snow deposition
Scopus关键词: advection
; atmospheric deposition
; complex terrain
; grain size
; Lagrangian analysis
; large eddy simulation
; mountain environment
; numerical method
; snow
; spatial distribution
; wind field
英文摘要: Snow is one of the most dynamic natural elements on the Earth's surface, and the variations in its distribution in time and space profoundly affect the hydrological cycle, climate system, and ecological evolution as well as other natural processes. Most previous studies have paid less attention to the process determining the distribution of snow on the ground as a result of the effect of nonuniform mountain wind on the trajectories of snow particles. In this paper, we present a numerical study on the falling snow deposition process involving snow particles of mixed grain sizes over complex terrain. A three-dimensional large-eddy simulation code was used to predict the wind field by considering the fluid-solid coupling effect, and the Lagrangian particle tracking method was employed to track the movement of each tracking snow particle. The grid resolution and model parameters were determined by the best fit with the field experiment, and the coupling effect between snow particles and wind field was found to be nonnegligible when the drifting snow occurred. In general, the preferential deposition on a single ridge showed a tendency from windward slope toward leeward slope with the increasing advection, while it was hard to describe the snow distribution over complex terrains with a unified deposition model due to the interaction of surrounding topographies and different atmospheric stabilities, and the particle tracking approach was substantially suitable for this issue. Our study significantly improved the understanding of the evolution of snow distributions at high levels of resolution. ©2016. American Geophysical Union. All Rights Reserved. 资助项目: 41371034
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62742
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Key Laboratory of Mechanics on Disaster and Environment in Western China (Lanzhou University), The Ministry of Education of China, Lanzhou, China; Department of Mechanics, School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, China
Recommended Citation:
Wang Z.,Huang N.. Numerical simulation of the falling snow deposition over complex terrain[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)