WIND

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WIND

• I dont think were in Kansas anymore

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How is Wind Measured?

• With ANENOMETERS!

Aerovane, Lazer doppler anenometer and anenometer
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Westerlies come from the West

• They do not GO west, they COME FROM the west.
  Got it?
• Easterlies...
• Northwesterlies
• Southeasterlies well you get the idea.
• But a West wind goes West

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Wind Chill a measure of heat loss from your body
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What Causes the Wind?

• Wind moves from areas of high pressure to areas
  of lower pressure
• HIGH LOW

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1. Local Winds

• Caused by unequal heating of the Earths surface
  within a small area

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Local Wind (review)
Suns Radiation
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High Density
Hot Air Molecules Rise and cool
Low Density
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(No Transcript)
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Lake Effect or Sea Breeze
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Land Breezes
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Monsoons sea breezes that last a long long time
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Mountain Winds
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Global Winds

• Produced by the movement of air between the
  equator and the poles long distances!

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Global Winds

• Polar Easterlies
• Prevailing Westerlies above 60 degrees
• Horse Latitudes (neigh) calm at 30
• Trade Winds Easterlies
• Doldrums calm at the equator

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Global Winds
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Coriolis Effect

• Hot air is lighter than cold air and will rise
  into the sky until it reaches approximately 10 km
  (6 miles) altitude and will spread to the North
  and the South. If the globe did not rotate, the
  air would simply arrive at the North Pole and the
  South Pole, sink down, and return to the equator.
  BUT

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The Power of the Wind

• The sun radiates 174,423,000,000,000 kilowatt
  hours of energy to the earth per hour. ( the
  earth receives 1.74 x 10 17 watts of power )
• About 1 to 2 of the energy from the sun is
  converted into wind energy... That is about 50 to
  100 times more than the energy used by all plants
  on earth to grow!

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Summary

• Winds are caused by unequal heating of the
  Earths surface
• Its measured using anenometers
• 3 types of wind local, global, jet stream
• Coriolis Effect is due to the Earths rotation