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  4. Snow Particle Motion in Process of Cornice Formation
 
preprint

Snow Particle Motion in Process of Cornice Formation

Yu, Hongxiang  
•
Lehning, Michael  
•
Guang, Li
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October 7, 2024

Snow cornices are a common snow pattern in cold regions, and their fracture and collapse can easily trigger avalanches. Despite numerous observations and experimental simulations on their formation process, the microscopic mechanism of their formation remains unclear. In this paper, based on wind-tunnel experiments and high-speed photography, experimental studies on the trajectory of particles surrounding the snow cornice were carried out. Results indicated that the cornice is composed of small-sized snow particles. Saltation is the most dominant moving pattern for particles adhering to cornice. Notably, particles at the edge exhibit lower impact velocities and a wider distribution of impact angles compared to those on the surface. Further analysis of force balance equations of particles at the edge explains the shape-forming mechanism of wedged-like snow cornice. This work enhances the understanding of the micro-mechanism of snow cornice formation, offering theoretical insights for avalanche prediction.

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Type
preprint
DOI
10.5194/egusphere-2024-2458
Author(s)
Yu, Hongxiang  
Lehning, Michael  

EPFL

Guang, Li

Lanzhou University

Walter, Benjamin

WSL Institute for Snow and Avalanche Research SLF

Huang, Jianping

Lanzhou University

Huang, Ning

Lanzhou University

Date Issued

2024-10-07

Publisher

Copernicus GmbH

Written at

EPFL

EPFL units
CRYOS  
Available on Infoscience
March 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/248243
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