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Air Masses

Air Masses. An immense body of air, usually more than 1,000 miles across and several Km thick Characterized by a similarity of temperature, moisture It carries those characteristics with them and can affect Large portions of a continent. Defined by their source regions. Air Masses.

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Air Masses

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  1. Air Masses • An immense body of air, usually more than 1,000 • miles across and several Km thick • Characterized by a similarity of temperature, moisture • It carries those characteristics with them and can affect • Large portions of a continent. • Defined by their source regions

  2. Air Masses Source Regions: an area where an air mass acquires its characteristics Temperature Polar (P): originate in high latitudes toward poles Tropical (T): originate in low latitudes Moisture Continental (c): originate over land Maritime (m): originate over water

  3. Air Masses Four Basic Air Masses • Continental Polar (cP) • Continental Tropical (cT) • Maritime Polar (mP) • Maritime Tropical (mT)

  4. Air Masses FIG 9-1

  5. Fronts The transition zone between two air masses

  6. Fronts Cold fronts

  7. Cold Fronts: Wind Shifts

  8. Cold Fronts: Temperature and Dewpoints

  9. Cold Fronts: Precipitation and clouds

  10. Fronts Warm fronts

  11. Warm Fronts : Wind Shift

  12. Warm Fronts : Temperatures and Dewpoints

  13. Warm Fronts : Precipitation

  14. Fronts Stationary fronts

  15. Fronts Occluded fronts The cold front overtakes The warm front

  16. Fronts Dryline: a dewpoint front

  17. Cyclones and Associated Fronts

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