Meteorology Air Masses, Fronts, and Weather
What is an air mass? <ul><li>10.  Air mass - A large region of the atmosphere where the air has similar properties through...
How do these air masses move?
<ul><li>Air masses are moved by global winds that tend to move from west to east.  </li></ul><ul><li>Between 30° North Lat...
 
What happens if two air masses collide?
<ul><li>When air masses of different temperatures meet they do not mix together.  </li></ul><ul><li>These air masses form ...
<ul><li>5.  Weather  changes often occur at  fronts  where different air masses meet  </li></ul>
Cold Fronts <ul><li>Cold air moves in under a warm air mass. </li></ul><ul><li>They often bring storms including thunderst...
Warm Fronts <ul><li>Warm air moves in over a cold air mass. </li></ul><ul><li>They often bring light, steady rain or snow....
<ul><li>VIDEO </li></ul>
Why are weather satellites so important?
<ul><li>Satellites in space allow us to see fronts and storms.  </li></ul><ul><li>These satellites orbit the Earth and tak...
 
<ul><li>Why is it so important that scientists are able to predict what the weather is going to be? </li></ul>
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Airmasses

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Airmasses

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