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Cards In This Set
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The two most important properties that should be relatively homogeneous at the same altitude in an are mass are...
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Moisture content and temperature
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An air mass from the Gulf of Mexico is called:
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MT
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An air mass from the Gulf of Mexico that moves northward over the U.S in winter would be labeled...
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MTw
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The air mass type most likely to form thunderstorms is...
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MT
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In North America the ______ air mass forms only in the summer.
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CT
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The pronounced cooling that occurs on continents at high latitudes during winter leads to the formation of ____ air masses.
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CP
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An ideal source region of air masses should be...
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Physically uniform
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An mP air mass is...
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Humid and cold
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The cP air mass in North America originates in...
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Interior Alaska and Canada
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Characteristics of an air mass source region include...
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Uniformity of temperature and moisture
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The air masses that have the greatest influence on weather conditions in the Midwestern United States are...
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CP and mT
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An air mass source region...
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Is characterized by a general stagnation of atmospheric circulation
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Why are cT air masses of minor importance for the U.S?
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No large source region is near the U.S
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The typical amount of time it takes for an air mass to pass over a given area is on the order of a few...
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Days
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An air mass is often modified as it moves over the Earth's surface. This modification is largely due to
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Contact with the ground below
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