雨幡洞云,也称穿洞云,是一个可出现在卷积云或高积云中的缝隙。
当云层中的部分水滴冻结形成冰晶体,从云层中降落下,便形成雨幡洞云,但由于缺乏冰核过程,处于过冷状态的水尚未结冰。
当冰晶形成时,由于韦格纳–伯杰龙–芬德森过程(Wegener–Bergeron–Findeisen process,又称为Bergeron process )而引起的骨牌效应,导致冰晶晶体周围的水滴蒸发,从而在云中形成了大洞。 [1]
参考资料
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