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Cirrus spissatus or also called Cirrus densus and Cirrus nothus [1] clouds are the highest of the main cloud genera, and may sometimes even occur in the lower stratosphere.The characteristic features of cirrus clouds are fine threads or wisps of ice crystals, generally white, but appearing grey when dense and seen against the light.
Cirrus clouds are usually formed as warm, dry air rises, [2] causing water vapor to undergo deposition onto particles, including mostly mineral dust and metallic particles [17] [18] at high altitudes. Particles gathered by research aircraft from cirrus clouds over several locations above North America and Central America included mineral dust ...
Cloud decks in parallel bands of latitude at and below the tropopause alternately composed of ammonia crystals and ammonium hydrosulfate. Cirriform Bands of cloud resembling cirrus located mainly in the highest of three main layers that cover Jupiter. [28] Stratiform and stratocumuliform Wave and haze clouds that are seen mostly in the middle ...
Nacreous clouds, also known as "mother-of-pearl" clouds, are high-altitude clouds that form in the stratosphere, typically at altitudes of 15 to 25 kilometers, and are most commonly observed in ...
Tops of clouds lose hard, rough appearance and become smooth: Cb: Capillatus: cap: Tops of clouds become distinctly fibrous or striated. Cirrus clouds are often in appearance: Cb Castellanus: cas: Distinct turrets rising from a large base or line of cloud: Sc, Ac, Cc: Congestus: con
A cumulonimbus capillatus is a cumulonimbus cloud with dense cirrus clouds above it, making the cloud top appear to contain hair-like structures. The name comes from the Latin word capillatus, meaning "with hair". [1] It is an intermediate stage between cumulonimbus calvus and cumulonimbus incus.
This is an accepted version of this page This is the latest accepted revision, reviewed on 22 January 2025. Visible mass of liquid droplets or frozen crystals suspended in the atmosphere "Nephology" redirects here. Not to be confused with Nephrology. For other uses, see Cloud (disambiguation). Cloudscape over Borneo, taken by the International Space Station Part of a series on Weather ...
A thickening and lowering of these high clouds into middle-stage altostratus or altocumulus is a good sign the warm front or low has moved closer and precipitation may begin within less than six hours. Once the clouds have thickened to 2,500 metres (8,200 ft) from the earth’s surface, precipitation can begin to fall from heavy nimbostratus ...