Nacreous Clouds

Polar stratospheric clouds are clouds in the winter polar stratosphere at altitudes of 15,000–25,000 m. They are best observed during civil twilight, when the Sun is between 1 and 6 degrees below the horizon, as well as in winter and in more northerly latitudes. One main type of PSC is made up mostly of supercooled droplets of water and nitric acid and is implicated in the formation of ozone holes. The other main type consists only of ice crystals which are not harmful. This type of PSC is also referred to as nacreous.

Sky and Weather
Add to Wishlist	Deck/File Name: Nacreous Clouds (nacreousclouds)
	Made/Donated by: Mio / saya	Color: Plum
	Released: 2021-09-11	Masterable: Yes
	Wished by: saya
	Mastered by: saya, StephJ

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