Cyclones
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CYCLONES. Bianca Ricci, Sol Echandi and Agustina Fernandez 9ºA- 2013. What is a Cyclone?. A cyclone is a system of rotating winds over a warm water area, spinning inward to a low pressure center and generally causing stormy weather. Structure of a Cyclone.

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CYCLONES

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Cyclones

CYCLONES

Bianca Ricci, Sol Echandi and Agustina Fernandez

9ºA- 2013


What is a cyclone

What is a Cyclone?

A cyclone is a system of rotating winds over a warm

water area, spinning inward to a low pressure center and

generally causing stormy weather.


Structure of a cyclone

Structure of a Cyclone

  • EyeThe centre or eye of a tropical cyclone is at the area of lowest pressure and is characterized by little or no wind and often a cloudless sky. In severe cyclones the eye usually shows up as a circular hole in the central cloud mass.

  • Eye WallSurrounding the eye is a wall of dense convective cloud rising about 15 km into the atmosphere. This is the eye wall and is where the most violent winds and heaviest rainfall occur.

  • Spiral rain bands


Mayor cyclonic areas in the world

Mayor cyclonic areas in the world

  • North Atlantic

  • North-East Pacific

  • North-Central Pacific

  • North-West Pacific

  • North Indian Ocean

  • South-West Indian Ocean

  • Australian Region

  • Southern Pacific


How do cyclones form

How do cyclones form?

  • Sea water it’s at its hottest (27º or more).

  • Air above the sea surface is heated and the warm moist starts to rise.

  • A deep center of low atmospheric pressure is made while the moist rises.

  • Warm air spirals upward around the center of the cyclone, called the `eye´.

  • Very dark and heavy clouds form and precipitate torrential rainfall while in the `eye´ the weather is calm and dry.

http://www.youtube.com/watch?v=-AAG4HEsgMQ


Factors

Factors

  • Water temperature at least 27º or more

  • Down to a depth of at least 160 ft.

  • Rapid cooling with height

  • High humidity

  • Low wind speed difference in a small area


Impacts

Impacts

  • A cyclone can be still powerful enough to destroy vehicles, buildings and other structures and objects.

  • They can even make them fly in the sky, turning loose debris into fatal projectiles.

  • Cyclones have caused 1.9 million deaths worldwide.


Some famous cyclones around the world

Some Famous Cyclones Around the World


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