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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
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.
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