卷层云
卷层云(Cs)(拉丁学名Cirrostratus)白色透明均匀的云雾,地物有影,日月轮廓分明,常伴有晕。
一般可分为两种云状:
- 毛卷层云(Cs fil,Cirrostratus filosus):云体不均匀,可分辨,有明显的白色丝缕结构。
- 薄幕卷层云(Cs nebu,Cirrostratus nebulosus):均匀的云幕,较薄时不可见,只有日月晕可以证明云的存在,当云体较厚时,日月轮廓清楚,但光线应仍可以投影。
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