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A large parcel of air that has relatively uniform properties in the horizontal dimension and moves as an entity
characteristics of air masses
must be large, homogeneous, and distinct from surrounding air
formed when atmosphere is calm for a few days
how are air masses classified?
classified according to temperature and moisture characteristics of their source regions.
Source regions tend to be...
Associated with air that is stationary over a long period of time
cold air displaces warm air
steep uplift causes cumulonimbus clouds and heavy precipitation
Strong humidity boundary
When maritime tropical and continental tropical air masses reside next to eachother
found in the southern great plains
Characteristics of cyclogenesis
begins along the polar front
low pressure forms
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