雾凇俗称树挂,是在严寒季节里,空气中过于饱和的水汽遇冷凝华而成,是非常难得的自然奇观。雾凇非冰非雪,而是由于雾中无数零摄氏度以下尚未凝华的水蒸气随风在树枝等物体上不断积聚冻粘的结果,表现为白色不透明的粒状结构沉积物。雾凇形成需要气温很低,而且水汽又很充分,同时能具备这两个极重要而又相互矛盾的自然条件非常难得。 The haze, commonly known as the tree hung, is a very rare natural wonder in the cold season when the saturated water vapor in the air is condensed. The haze is not ice and not snow, but is the result of countless sub-zero degrees Celsius in the fog. As the wind continues to accumulate frozen sticks on the branches and other objects, it appears as white opaque granular structure deposits. The formation of haze requires very low temperatures, and the water vapor is very good. At the same time, it is very rare to have these two extremely important and contradictory natural conditions.