Chapter11b - Air Masses and Fronts II Brief review

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Air Masses and Fronts – II
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Brief review An  air mass  is a large body of air whose properties of temperature and  humidity are fairly similar in any horizontal direction Source regions  for air masses tend to be generally flat, of uniform  composition, and in an area of light winds, dominated by surface high  pressure Continental  air masses form over land.  Maritime  air masses form over  water.  Polar  air masses originate in cold, polar regions, and extremely  cold air masses form over  arctic  regions.  Tropical  air masses originate in  warm, tropical regions. Continental polar  (cP) air masses are cold and dry;  continental arctic   (cA) air masses are extremely cold and dry;  continental tropical  (cT) air  masses are hot and dry;  maritime tropical  (mT) air masses are warm and  moist;  maritime polar  (mP) air masses are cold and moist
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Air mass source regions and their paths
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What is an atmospheric front? A front is a transition zone between two air masses of  different densities The density contrast results from: Difference in  temperature ; Difference in  humidity . The frontal zone   (surface)  is the  upward extension of the front.  Sometimes the frontal zones can be very sharp.
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Types of Fronts Cold front : cold, dry stable air is replacing  warm, moist unstable air. Warm front
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This note was uploaded on 01/26/2012 for the course MET 1010 taught by Professor Matchev during the Spring '08 term at University of Florida.

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Chapter11b - Air Masses and Fronts II Brief review

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