中国上空的虹彩幞状云

2022年9月6日

An Iridescent Pileus Cloud over China
Image Credit & Copyright: Jiaqi Sun （孙嘉琪）

Explanation: Yes, but how many dark clouds have a multicolored lining? Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different amounts. The featured image was taken last month in Pu’er, Yunnan Province, China. Also captured were unusual cloud ripples above the pileus cloud. The formation of a rare pileus cloud capping a common cumulus cloud is an indication that the lower cloud is expanding upward and might well develop into a storm.

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中国上空的虹彩幞状云
影像提供与版权: Jiaqi Sun（孙嘉琪）

说明: 多少乌云拥有色彩缤纷的衬套呢？如影像所示，这朵暗云的上头罩着一团虹彩幞状云，而其原始真身为一大团大小均一的小水滴，协同把不同颜色的阳光，不等量的衍射到不同的方向。这张在上个月摄于中国云南省普洱市的主题影像，还记录了幞状云上头的不寻常波纹。寻常的积雨云上方罩着罕见的幞状云，显示低层云正在向上扩张，或许会发展成风暴。

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明日的图片: tarantula’s webb