Cyclones

About Cyclones:

• Cyclones are centres of low pressure surrounded by closed isobars and having increasing pressure outwards.
• As air enters an area of low pressure from all directions, the Coriolis Effect bends the direction of the wind to the right of its path.
• This creates a counter clockwise rotation around the low and convergence near the centre of the system. As the air collides near the centre it is forced aloft where divergence takes air away from the centre of the system.
• A Cyclone is a system of low level convergence and high level divergence with a rising column of air in the centre of the rotating air mass. If the upper air is not diverging then there cannot be a cyclone present.
• Cyclones are broadly of two types:
  • Temperate cyclones (caused in middle and high latitudes, thus does not occur in India)
  • Tropical cyclones

Source : All India Radio

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