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Altocumulus (from Latin altus 'high' and cumulus 'heaped') [1] is a middle-altitude cloud genus that belongs mainly to the stratocumuliform physical category, characterized by globular masses or rolls in layers or patches – the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus. [2]
In the middle level are the alto- clouds, which consist of the limited-convective stratocumuliform cloud altocumulus and the stratiform cloud altostratus. Mid-level clouds form from 2,000 metres (6,600 ft) to 7,000 metres (23,000 ft) in polar areas, 7,000 metres (23,000 ft) in temperate areas, and 7,600 metres (24,900 ft) in tropical areas.
Altocumulus floccus is a cloud type named for its tuft-like, wooly appearance. [1] The base of the cloud can form as low as 2,000 metres (6,600 ft), or as high as 6,000 metres (20,000 ft). They often form in clusters, or patches, and bases can vary in height with differing atmospheric conditions within the PBL . [ 2 ]
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Clouds form as relatively warmer air carrying moisture rises within cooler air. As the moist air rises, it cools, causing some of the water vapor in the rising packet of air to condense . [ 4 ] When the moisture condenses, it releases energy known as the latent heat of vaporisation, which allows the rising packet of air to cool less than its ...
Crested wave-like stratocumulus, altocumulus, or cirrus cloud formed by wind-shear. Stratocumulus fluctus Incus "Anvil": Top part of a mature cumulonimbus cloud; anvil-shaped feature. Cumulonimbus incus mamma Mammatus WMO term mamma: "Breast": A feature in the form of round pouches on under-surface of a cloud. Mammatus over Squaw Valley Murus
Altocumulus clouds are small patches or heaps of white or light gray cloud. [49] [4] Like altostratus, altocumulus are composed of a mixture of water droplets, supercooled water droplets, and ice crystals. Although altocumulus clouds are mid-level clouds that form at roughly the same altitude as altostratus clouds, their formation methods are ...
The video of a massive wave crashing over a building’s roof also appears in the Sept. 11 video but is flipped. A clip showing a downed tree and a yellow car from above is included in an Aug. 28 ...