Learn about all of the different types of winds

What is wind? What causes it?

Have you ever wondered why the trees swing back and forth? Do you ever wonder why you feel a cool breeze on your face at the beach? All of those things are caused by wind!

  • Wind is the movement of air caused by differences in air pressure

  • The greater the difference, the faster the wind moves

Local Winds - How is it created?

  • generally move short distances and can blow in any direction
  • caused by geographic that produce temperature differences
  • occur over small areas
  • heats up more

Local Winds - How Sea Breezes Blow

  • High pressure is created over the ocean during the day and low pressure over land due to uneven heating

  • Air moves from the ocean to the land creating a sea breeze
  • cools slower than land breezes
  • occur during the day
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Local Winds - How Land Breezes Blow

  • low pressure occurs over the ocean during the night and high pressure over the land due to the uneven heating of the earth
  • this causes wind to move from the land to the ocean creating a land breeze
  • cools quicker than sea breezes
  • occurs during the night
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Global Winds

  • the combination of pressure belts and the Coriolis Effect cause global winds
  • these are polar easterlies, prevailing westerlies, and trade winds
  • occur over large areas
  • heats up less
  • there is a large convection current that occur between the equator and the poles

Global Winds - Horse Latitudes

  • occur at about 30 degrees north and south of the equator where the winds are very weak
  • most deserts on the earth are located here because of the dry air
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Global Winds - Trade Winds

  • winds that blow from 30 degrees almost to the equators
  • called trade winds because of their use by early sailors
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Global Winds - Polar Easterlies

  • wind belts that extend from the poles to 60 degrees latitude
  • formed from cold sinking air moving form the poles creating cold temperatures
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Global Winds - Prevailing Westerlies

  • wind belts found between 30 degrees and 60 degrees latitude
  • flows toward the poles from west to east carrying moist air over the United States
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