Weather Lesson Three

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Weather Lesson Three

• Wind Belts

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CORIOLIS EFFECT

• Deflection of winds caused by Earths rotation.
• Winds are deflected to the right in the northern
  hemisphere, and to the left in the southern
  hemisphere.

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WIND BELTS

• A series of parallel belts on Earths surface
  within which the winds generally move in a
  specific direction.
• Due to an unequal heating (insolation) of Earths
  surface, areas of different pressures are formed,
  which will result in the formation of convection
  currents.

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• 0 latitude greatest insolation air rises
  low pressure.
• 90 latitude least insolation air sinks
  high pressure.
• Due to Coriolis Effect, air bunches up and sinks
  at 30 latitude (creating high pressure) and
  rises at 60 latitude (creating low pressure).
• Therefore, 6 specific wind belts are set up on
  Earths surface.

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Surface Winds
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Global Wind Belts
Equatorial Wind Belts
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JET STREAMS

• Fast moving bands of air (up to 500 km/hr)
  between 6 to 12 kilometers high and 500
  kilometers wide.
• Day to day (and seasonal) changes in weather
  patterns are affected by these jet streams.

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