中国西北地区春季冻结层的融化，也是大规模黄土滑坡发生的诱因。
In Northwest China, the thawing of the frozen layer in spring is the main cause of large-scale landslides in loess region.
结果表明，冻结层和融化层之间的水汽辐合和较强的上升运动是冻雨产生的两个必要条件。
The results show that the water vapor convergence and the strong upward movement between the freezing layer and the melting layer are the essential conditions for the formation of freezing rain.
当考虑真实地形影响时， 冻结层在雪峰山脉的北面存在加厚过程， 冷中心温度明显偏低；
When the influence of actual terrain considered, there is a thickening progress of the frozen layer in the north of Xuefeng mountain area with a obviously low temperature in the cold center.
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