Cyclone

In meteorology, a cyclone is an area of closed, circular fluid motion rotating in the same direction as the Earth. This is usually characterized by inward spiraling winds that rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere of the Earth. Most large-scale cyclonic circulations are centered on areas of low atmospheric pressure. The largest low-pressure systems are cold-core polar cyclones and extratropical cyclones which lie on the synoptic scale. According to the National Hurricane Center glossary, warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale.Mesocyclones, tornadoes and dust devils lie within the smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the Tropical Upper Tropospheric Trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars and Neptune.Cyclogenesis describes the process of cyclone formation and intensification.Extratropical cyclones form as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract to form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, cyclones occlude as cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the cancer or subtropical jet stream.

Cyclone (disambiguation)

A cyclone is an area of closed, circular fluid motion characterized by inwardly spiraling winds.

Cyclone may also refer to:

In the military

Transportation

Land

Cyclone (comics)

Cyclone, in comics, may refer to:

See also

Shade (Silverchair song)

"Shade" is a song by Australian alternative rock band Silverchair. It was released as the fourth single from their debut album, Frogstomp, in 1995. It was the group's only single not chosen to be on their compilation album The Best of Volume 1.

Track listing

Australian CD single (MATTCD014)

The single is no longer available and is considered a rarity.

Charts

References

External links

Silverwing (series)

The Silverwing Book Series is a series of books by Kenneth Oppel featuring the adventures of a young bat, Shade. The books are commonly assigned in the curriculum of upper elementary and middle school grades in Canada.

Summary

Great war

The great war between the birds and the beasts happened approximately 65 million years before the story (at the end of the dinosaurs). The bats, seeing themselves as being both, but neither, refrained from fighting. At the end of the war, the two warring factions banished the bats. They could not see the sun again because they refrained. The war is based upon a fable by Aesop called "The Birds, the Beasts and the Bat."

Sun Freedom

Tints and shades

In color theory, a tint is the mixture of a color with white, which increases lightness, and a shade is the mixture of a color with black, which reduces lightness. A tone is produced either by the mixture of a color with gray, or by both tinting and shading. Mixing a color with any neutral color (including black, gray and white) reduces the chroma, or colorfulness, while the hue remains unchanged.

In common language, the term "shade" can be generalized to furthermore encompass any varieties of a particular color, whether technically they are shades, tints, tones, or slightly different hues; while the term "tint" can be generalized to refer to the any lighter or darker variation of a color (e.g. Tinted windows).

When mixing colored light (additive color models), the achromatic mixture of spectrally balanced red, green and blue (RGB) is always white, not gray or black. When we mix colorants, such as the pigments in paint mixtures, a color is produced which is always darker and lower in chroma, or saturation, than the parent colors. This moves the mixed color toward a neutral color—a gray or near-black. Lights are made brighter or dimmer by adjusting their brightness, or energy level; in painting, lightness is adjusted through mixture with white, black or a color's complement.