Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands. They form when water vapor undergoes deposition at altitudes above 5,500 m in temperate regions, and above 6,400 m in tropical ones. Cirrus clouds also form in the atmospheres of other planets, including Mars, Jupiter, Saturn, Uranus, and Neptune.
About Cirrus cloud in brief
Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands. They form when water vapor undergoes deposition at altitudes above 5,500 m in temperate regions, and above 6,400 m in tropical ones. Jet stream-powered cirrus can grow long enough to stretch across continents, while remaining only a few kilometers deep. Interaction of visible light with the ice crystals in them produces, below, optical phenomena such as sun dogs and halos. Cirrus clouds also form in the atmospheres of other planets, including Mars, Jupiter, Saturn, Uranus, and Neptune. Some of these extraterrestrial cirrus clouds are composed of ammonia or ices of methane, much as with terrestrial water ice. The length of each of these ice crystals is usually 0. 25 millimeters long, but they range from as short as 0. 01 millimeter or as long as several millimeters. There are, on average, 30 ice crystals per liter , but this ranges from one ice crystal per 10,000 liters to ten,000 ice crystalsper liter, a difference of eight orders of magnitude. The ice crystals have different shapes in addition to different sizes. Some shapes include solid columns, hollow columns, plates, rosettes, and conglomerations of the various other types. In Antarctica, cirrus are usually composed of only the columns and plates, and these are much longer than normal. Ranging the different columns are different columns, giving highly accurate information on the altitude, length, width and humidity of the cirrus cloud.
Radar is not accurate enough to measure the depth of the cloud, but it is assumed that there are cirrus Clouds in that location. The National Aeronautics and Space Administration’s MODerate Aerosol Administration’s satellite program measures the altitude and thicknesses of cirrus. These satellites measure where infrared radiation is absorbed in the atmosphere and if it is absorbed at cirrus altitudes, then it is presumed that cirrus is there. The U.S. Air Force’s Stratospheric Aerosols and Experiment and Gas Experiment program also measures the altitudes and Thickness of Cirrus Clouds from the U.N.’s Stratosphere Stratosol Gas Experiment and Experiment program. This data is used to determine the altitude of cirruus clouds in the northern Arctic region of the United States and other parts of the world, and to predict weather conditions in the region. The shape of the ice crystal is determined by the air temperature, atmospheric pressure, and ice supersaturation. cirrus in temperates typically have the shapes segregated by type: the Columns and plates tend to be at the top of thecloud, whereas the rosette and conglomeration tend tobe near the base. The clouds also arrive in advance of those storms’ associated frontal systems, likely presaging a deterioration in weather conditions, but these clouds produce, themselves, at most fall streaks.
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This page is based on the article Cirrus cloud published in Wikipedia (as of Dec. 05, 2020) and was automatically summarized using artificial intelligence.
