An analytical result of the diffusion-controlled melting of a snow layer is presented here when a snow layer was quickly immersed in CaCl
2 aqueous solution. The analytical result predicts the experimental results of melting well. The temperature in the melting system decreases quickly during the melting. The melting completes in a few seconds, which denotes a thermodynamical equilibrium. When the initial temperature Τ
i and the initial porosity of snow ε
i. the constant, the initial concentration C
mi in the solution strongly affects both the decrease in the temperature in the melting system and the melting mass per unit volume Μ. When C
mi, Τ
i and ε
i are the same, the maximum melting mass per unit volume Μ
max in equilibrium is independent of the snow particle diameter. A figure was presented for the relation Μ
max-Τ
i, C
mi, ε
i.
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