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Global Wind Notes

What is the relationship

  1. It is warmer at the equator and colder at the poles.

Between pressure and wind

Cold air sinks – it is under high pressure.


Warm air rises – it is under low pressure.

 

Cold air always move into warm air.

What is wind?

  1. The movement of air from one place to another is wind.
 

Coriolis Effect – winds/oceans move in a curved pattern due to the

 

The curvature of the Earth.

What are Global winds?

  1. Polar Easterlies – winds at the poles 90 to 60 degrees latitude
 

Move from the north to the south west.

 
  1. Prevailing Westerlies – winds that blow from 60 degrees to 30
 

In a southwest to northeasterly direction.

 
  1. Trade winds - flow from 30 degrees to the equator in a northwest
 

to southwest direction.

 
  1. Doldrums - are an area of calm winds at the equator
 

Winds from the N and S hemisphere meets there.

 
  1. Horse Latitudes – are located at 30 degrees. Is an area of low pressure
 

pressure of calm air/winds and ocean waters.

 

Ship merchants threw Horses overboard to save themselves

   

What is the Jetstream?

  1. A narrow belt of strong winds that blow in the upper troposphere
 

At 400 km per hour. It affects the movement of weather. It is not

 

Constant in that it changes its path of direction.

   

Local Winds: Land Breeze &

  1. During the day, sand heats up faster than the ocean water. Land =

Sea Breeze

Low pressure area. The water is cooler= high pressure. Air moves

 

From the ocean to land, creating a sea breeze.

 

During the night, sand cools faster than the ocean. Air moves from

 

The sand to the ocean, creating a land breeze.

   
   
 Summary  
   
   
   
   
   
   
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