write about cyclonic rainfall
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It is the rainfall which occurs after a violent cyclone....
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→️ This type of rainfall is associated with the passage of a cyclone or a depression.
→ The term cyclone is derived from the Greek word “Kyklon”, meaning “Revolving”.
→ There are two types of cyclones:
» The tropical cyclones
» The temperate cyclones
- Tropical cyclones are warm - core vortex circulation of tropical origin with a small diameter (some hundreds of kilometers).
- Often of an approximately circular shape, minimum surface pressure (less than 900 mb) with sustained maximum winds of at least 33m/sec.
- They are developed on the warm sea surface (26°C to 27°C) and move towards the land.
- The winds are lifted up by the moving of cyclones.
- The uplifted air gives heavy rainfall.
- Temperate cyclones occur when the cold,dry,denser air masses converge with warm,wet, lighter air masses.
- The warmer air, being lighter, is lifted up by the denser cold air and it results in the rainfall.
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