How to tropical cyclones occur?

Question

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Answer 1

Cyclones develop over warm seas near the Equator. Air heated by the sun rises very swiftly, which creates areas of very low pressure. As the warm air rises, it becomes loaded with moisture which condenses into massive thunderclouds. Cool air rushes in to fill the void that is left, but because of the constant turning of the Earth on its axis, the air is bent inwards and then spirals upwards with great force. The swirling winds rotate faster and faster, forming a huge circle which can be up to 2,000 km across. At the centre of the storm is a calm, cloudless area called the eye, where there is no rain, and the winds are fairly light.

Answer 2

The tropical cyclones form on the inter-tropical convergence zone near the equator where the the tropical airmasses from either hemisphere meet.These airmasses are warm and humid  and have favouirable lapse rates up to great heights.Therefore convection starts on a large scale producing a lot of rain-bearing and thunderstorm-producing clouds ,ultimately leading to the formation of tropical cyclones in which winds blow in an anti-clockwise direction as seen from above.Coriolis force deflects these winds and produces a whirling motion.Thus the cyclone becomes a rotating cylinder of clouds and winds with a diameter of 200 to 500 miles and a height of about 12 to 15 Kms (in tropics)sometimes.It will have a steep pressure gradient with a very low pressure near the centre.

The energy of the cyclone is derived from the latent heat of condensation of the ascending moist air.