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What is cyclone and how it is form

A cyclone is a large scale air massthat rotates around a strong center of low atmospheric pressure. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure.

The cyclones are classified on the basis of the maximum sustained surface wind speed (MSW) they generate as severe (MSW of 48-63 knots), very severe (MSW of 64-89 knots), extremely severe (MSW of 90-119 knots) and super cyclonic storm (MSW of 120 knots or more). One knot is equal to 1.8 kmph.

Structure of cyclone

There are a number of structural characteristics common to all cyclones. A cyclone is a low-pressure area. A cyclone's center is the area of lowest atmospheric pressure in the region.The pressure in the center of the cyclone compared to the pressure outside the cyclone ( pressure gradient force ) and the force from the Coriolis effect must be in an approximate balance, or the cyclone would collapse on itself as a result of the difference in pressure.

Formation of cyclone

The initial extratropical low-pressure area forms. It is usually perpendicular leaf-like cloud formation during the early stage of cyclogenesis.

Tropical cyclones form when the energy released by the condensation of moisture in rising air causes a positive feedback loop over warm ocean waters.

Nomenclature of cyclone

Henry Piddington published 40 papers dealing with tropical storms from Calcutta between 1836 and 1855 in The Journal of the Asiatic Society. He also coined the term cyclone, meaning the coil of a snake. In 1842, he published his landmark thesis, Laws of the Storms.
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