New Science Photo of the Day: 12

clouds
In 2017, the World Meteorological Organization added 12 new cloud classifications. The diagonal cloud in this photo is one of the new types. What is it?

Click here for the answer:

The diagonal cloud is actually an example of two of the new cloud classifications. In the upper right corner, it is Cirrus homogenitus, the new classification for a man-made cloud (contrail from an airplane.) In the lower left, the contrail has changed into one of the old classifications, Cirrus fibratus. Because it "mutated" from a man-made cloud , it is now classified as Cirrus fibratus homomutatus.

You can find all twelve of the new classifications on the World Meteorological Organization website at: https://www.wmo.int/wmocloudatlas/ICA-New-classifications.html