Weather and Climate Ch9

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Weather and Climate Ch9
2011-08-21 22:59:11
Weather Climate

Weather and Climate Ch9
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  1. air masses
    a large body of air having more or less uniform temperature and moisture.
  2. fronts
    Air masses are commonly separated from each other by fairly narrow boundary regions called fronts
  3. source regions
    The areas of the globe where air masses form
  4. Continental polar (Cp) air masses
    Air masses thhat form over large, high latitude land masses
  5. Continental Arctic (cA) air masses
    colder than continental polar air and is separated from cP by a transition zone called the arctice front
  6. Maritime polar (mP) air masses
    similar to continental polar air masses but are more moderate in both temperature and dryness
  7. northeasters
    winds that can bring snowfall and cold winds in response to Maritime polar air masses
  8. Continental Tropical (cT) air masses
    forms in summer over hot, low latitude areas
  9. Maritime Tropical (mT) air masses
    develop over warm, tropical waters and are warm, moist, and unstable near the surface. Can form precipitation and clouds.
  10. cold front
    occurs when a wedge of cold air advances toward warm air
  11. warm front
    occurs when a wedge of warm air advances toward cold air
  12. stationary front
    similar to a cold front but does not move
  13. occluded front
    appear at the surface of the boundary of two fronts, but unlike the other three types of fronts, do not separate air masses
  14. overrunning
    warm air sliding over a dense cold air mass because the deifferent densities in the two air masses discourage mixing
  15. drylines
    areas where mT air and cT air masses reside next to each other