地形作用也能形成云,这种云被称为“地形云”。地形云一般没有固定形状,可以归入各云族中去。但是,也有少数形态独特的云不适合归入各云族中去。比如,有一种出现在山巅的波状云,云体颜色洁白,形体独特,被称为天然艺术品。还有一种浪涛状的地形云,暗黑色的浪涛像大海里的浪花滚滚推进。有人在实验室里模拟了这种波涛形成过程的3个阶段,这种波涛形成过程被称为“凯尔文·赫姆霍兹波涛形成过程。”
About northwest air current cold advection and Hetao cold vortex weather situation,The instability stratification that caused by humidity static instability and cold advection was advantaged to orographic cloud growth.
西北气流冷平流型和河套冷涡型下,由湿静力不稳定层结和冷平流引起的不稳定层结对地形云的发展较为有利。
参考来源 - 祁连山南麓河谷地形云生长的层结特征·2,447,543篇论文数据,部分数据来源于NoteExpress
然后研究人员推动这个冷却的云斑,并进一步把反质子压缩,以致可以用一个相似大小的中子云来与它相重叠,就在那时,两个粒子(反质子和中子)成对地形成了反氢原子。
Then the researchers nudged this cloud of cold, compressed antiprotons so it overlapped with a like-size positron cloud, where the two particles mated to form antihydrogen.
建立了一个适用于复杂地形的冰雹云模式。模式是二维、弹性、非静力、采用地形跟随坐标、包含双变参数冰相微物理过程参数化。
A hail cloud model that is two dimensional elastic non hydrostatic, USES a terrain following coordinate system and includes double parameters for ice phase microphysics, has been developed.
在积云云底之上较底的高度上可以较早地形成较为稳定的云滴谱谱型,而在较高的高度上则要晚一些。
Cloud droplet spectra could be formed in a comparatively low level above cloud base and developed later in higher levels.
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