積雪底面からの融雪にともなう空洞の発生について-2-2層構造の積雪のための理論

概要

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Air gaps are frequently formed when a snow cover is melted at its bottom boundary. In this paper, the condition of air gap formation is analysed theoretically for two different snow cover models: (1) a two-layered snow cover and (2) a one-layered snow cover with uniform load on its surface. It is shown that the condition of air gap formation in the short wave approximation in which the disturbance wave length of horizontal uniformity is much smaller than the snow cover depth is independent of hardness of the upper layer. When the lower layer is very hard in comparison with the upper layer, the upper layer functions only as a load to the lower layer. In the long wave approximation, when the upper layer is hard such as an ice layer, the condition of air gap formation becomes favorable.
社団法人日本雪氷学会の論文