Airmasses
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Airmasses Presentation Transcript

  • 1. Meteorology Air Masses, Fronts, and Weather
  • 2. What is an air mass?
    • 10. Air mass - A large region of the atmosphere where the air has similar properties throughout.
    • Air masses get their properties from the region over which it forms.
      • For example, air over the Gulf of Mexico is above warm water so the water warms the air.
    • When air masses move they bring these conditions with them.
  • 3. How do these air masses move?
  • 4.
    • Air masses are moved by global winds that tend to move from west to east.
    • Between 30° North Latitude and 60° North Latitude is the zone of westerly winds . Westerly winds blow from the west.
    • What are lines of latitude? Who can show me on the globe?
  • 5.  
  • 6. What happens if two air masses collide?
  • 7.
    • When air masses of different temperatures meet they do not mix together.
    • These air masses form a boundary between them called a front.
    • Fronts often cause rainy, unsettled weather.
  • 8.
    • 5. Weather changes often occur at fronts where different air masses meet
  • 9. Cold Fronts
    • Cold air moves in under a warm air mass.
    • They often bring storms including thunderstorms and strong winds.
    • After the storm clears the skies are clear and the weather is cooler and drier.
  • 10. Warm Fronts
    • Warm air moves in over a cold air mass.
    • They often bring light, steady rain or snow. They may also cause fog.
    • After the weather is usually warmer.
  • 11.
    • VIDEO
  • 12. Why are weather satellites so important?
  • 13.
    • Satellites in space allow us to see fronts and storms.
    • These satellites orbit the Earth and take pictures of weather patterns.
    • When fronts collide, scientists can see places where the weather may change quickly and dangerously.
  • 14.  
  • 15.
    • Why is it so important that scientists are able to predict what the weather is going to be?