![]() ![]() You would need to live at a high altitude, between 45° and 60° North or South latitude, in countries such as Canada, Norway, Finland, Spain, Italy, and Serbia, to name a few. Earths Rarest Cloud Type Finally Caught on Camera Asperitas Clouds Astrum 1.37M subscribers Join Subscribe 52K Share Save 1.4M views 6 months ago astrum rareclouds Why Asperitas. Noctilucent clouds are visible the most when the Sun is below the horizon. ![]() They are the highest-appearing clouds in Earth’s atmosphere and the newest of all the clouds we have today, first seen in 1885 after the explosion of the Krakatoa volcano. (most commonly occurring mother- clouds are listed in the same order as. Clouds over Pocahontas, Missouri in 'asperatus' or 'undulatus asperatus' formation. Asperitas is characterised by localised waves in the cloud base, either smooth or dappled, sometimes descending into sharp points, as if viewing a roughened sea surface from below. Noctilucent clouds consist of ice crystals, but they don’t have precipitation as they occur during summer when the weather is dry. Other new types of cloud include in this cloud atlas are Asperitas, Cavum, Cauda, Fluctus, Flumen and Murus, Cataractagenitus, Flammagenitus, Homogenitus. Asperitas is a newly-classified cloud by WMO’s International Cloud Atlas, mainly because of its shape but also its inner dynamics. ![]() Also called night-shining clouds, these clouds occur in the mesosphere layer, almost 50 miles above the Earth’s surface. Noctilucent clouds are tied with Nacreous clouds for the rarest on our list because they are rarely seen, especially during the day when the Sun is the brightest. ![]()
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