weatherone1011

weatherone1011 - APEnvSci20102011 ?NO AirMass...

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And The Weather’s Good…part I AP Env Sci 2010-2011
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Weather Basics – and a little more • Air Takes on the Temperature and Moisture Characteristics  of the Surface it is Over. – Does this happen instantaneously?  NO – Needs to be Stationary or Slow Moving Air • Air Mass:   – Large body of air (~1600 km across) – Perhaps several kilometers thick – Homogeneous Temperature  and Moisture Content    – When the Air Mass moves on, it can carry Temperature  and Moisture properties with it.
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Source: NOAA.gov Air Masses Important for North America
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Air Masses: Who’s Who • cA :  Continental Arctic – Source:  Arctic basin and Greenland ice cap – Bitterly cold and very dry in winter • cP :  Continental Polar – Source:  Interior Canada and Alaska – Very cold and dry in winter, cool and dry in summer • mP :  Maritime Polar – Source:  North Pacific – Mild (cool) and humid entire year
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weatherone1011 - APEnvSci20102011 ?NO AirMass...

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