Winds

By: Kaleigh Tsakiris

General Info on Wind

Definition

  • Wind is the movement of air from areas of high pressure to areas of low pressure How is it caused
  • Winds are caused by the difference in air pressure

Local Winds

Definition


  • Local Winds are winds that blow over a short distance. A cool breeze blowing in from the water over a beach is an example of a local breeze



  • These winds are caused by unequal heating of Earth's surface within a small area




  • Blows from an ocean (sea) or lake towards land
  • Usually happens during the day




  • Blows from the land over a lake or ocean
  • Usually happens during the night
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Land Breeze (Above)

Sea Breeze (Below)

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Global Winds

  • A winds that blows steadily over long distances-A global wind blows from the same direction every time

Can be caused by convection Currents



  • The sun heats Earth unequally-For example, the sun shines directly over the equator- The sun shines at an angle over the poles



  • Doldrums- These winds are at the equator (0 degrees latitude) and they are very weak



  • Trade Winds- Blows to the West

Lie between 0 degrees and 30 degrees latitude and are very strong- Sailors used these winds to help them move their cargo to other countries to TRADE goods




  • Prevailing Westerlies- Blows to the East

Lie between 30 degrees and 60 degrees North and South latitude and blow from the West



  • Jet Streams- These are high speed winds blow at the top of the troposphere

They are hundreds of kilometers away


They blow at speeds of 200 to 400 kilometers per hour

A band of very strong winds in the upper troposphere. Airplanes use theses to travel faster while saving fuel

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Jet Streams (Top)

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Prevailing Westerlies (Middle)

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Trade Winds (Bottom)