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Tropical cyclones are not found between 10° north latitude and 10° south latitude due to :


1. High Temperature
2. Low Salinity
3. Great Depth of Water
4. Minimum Coriolis Effect

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Correct Answer - Option 4 : Minimum Coriolis Effect

The correct answer is the Minimum Coriolis Effect.

  •  The air moves between degrees of latitude tend to turn because of Coriolis force and this twisting of air is responsible for the swirling shape of tropical cyclones.
  • Another thing the Coriolis Effect does is make these massive storms rotate in different directions in the Northern and Southern Hemispheres.
  • Tropical cyclones are violent storms that originate over oceans in tropical areas.

  • Coriolis Force-
    • The rotation of the earth about its axis affects the direction of the wind and this force is called the Coriolis force.
    • It is directly proportional to the angle of latitude.
    • It deflects the wind to the left direction in the southern hemisphere and the right direction in the northern hemisphere.
    • The deflection is more when the wind velocity is high.
    • It is maximum at the poles and is absent at the equator.
    • The force acts perpendicular to the pressure gradient force.
    • The pressure gradient force is perpendicular to an isobar.
    • The higher the pressure gradient force, the more is the speed of the wind and the larger is the deflection in the direction of wind happens.
    • As a result of these two forces functioning perpendicular to each other, in the low-pressure areas the wind blows around it.
    • The Coriolis force is zero at the equator and the wind blows perpendicular to the isobars.

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