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Environmental conditions for snow cornice formation in a wind tunnel

Authors

Yu,  Hongxiang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Li,  Guang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Walter,  Benjamin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Michael,  Lehning
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang,  Jie
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Huang,  Ning
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Yu, H., Li, G., Walter, B., Michael, L., Zhang, J., Huang, N. (2023): Environmental conditions for snow cornice formation in a wind tunnel, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0797


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016693
Abstract
Snow cornices are common snow patterns in mountain ridge, which have potential to trigger snow avalanches. In this work, we present a series of wind tunnel experiments in a cold laboratory to simulate the formation processes of snow cornices. We quantitatively investigated the growth rates of snow cornice in length and in thickness, as well as the airborne particle concentration by using a COMOS camera. From a micro view, we also observed the snow particle trajectory that can stick on the edge and form the cornice through high-speed camera. Based on the experimental results, we explained the mechanism of the formation and development of snow cornices, and the effects of the environmental factors on the cornice growth such as air temperature, wind speed. A conceptual model that can predict the horizontal growth rate of snow cornice in field is established. Our predicted results are in good agreement with the field observation data from Gruvefjellet, Svalbard. Based on the physics of drifting snow, our results provide a new insight into snow cornice formation and improve the understanding of cornice processes that can influence avalanche activities. The experimental results and the conceptual model can be useful in future snow cornice simulation and prediction work for cornice-induced avalanches.