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METEOROLOGY

METEOROLOGY. Chapter 5 Objective 5-4. Objective. Objective 5-4 Describe different fronts and the associated cloud types and precipitation. Air Masses. An air mass is a large body of air that takes on the characteristics of the surface over which it forms.

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METEOROLOGY

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  1. METEOROLOGY Chapter 5 Objective 5-4

  2. Objective • Objective 5-4 • Describe different fronts and the associated cloud types and precipitation.

  3. Air Masses • An air mass is a large body of air that takes on the characteristics of the surface over which it forms. • An air mass extends over hundreds to thousands of kilometers. • The temperature and humidity within an air mass vary little in the horizontal.

  4. Classification of Air Masses • Air masses are classified according to their source region: • Maritime or Continental • Polar or Tropical • Arctic

  5. Types of Air Masses http://www.physicalgeography.net/fundamentals/7r.html

  6. Fronts • The boundary between two different air masses is called a front. • There are several different types of fronts: • Cold Front: cooler air is moving in replacing warmer air. • Warm Front: warm is is moving in replacing cooler air. (continued…)

  7. Fronts • Stationary Front: Two air masses are sitting still with very little movement of one replacing the other. • Occluded Front: A cold front has over-taken a warm front forcing warm air up above two cooler air masses.

  8. Cold Front http://www.cs.berkeley.edu/~samw/projects/ay249/0_meteorology/coldfront.jpg

  9. Warm Front http://www.cs.berkeley.edu/~samw/projects/ay249/0_meteorology/warmfront.jpg

  10. Occluded Front http://www.physicalgeography.net/fundamentals/7r.html

  11. Weather Map Symbols http://www.freewebs.com/wonderfulweather/fronts.htm

  12. Weather Maps http://www.atmos.millersville.edu/~lead/Fronts_Module.htm

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