Social Sciences and History / Unit 10 SSH 0935 short lesson, about 20 seconds
Air Masses by Letter Code; The Polar Front
Captions available
The idea
An air mass has uniform moisture and temperature, from a uniform source region. Its code: lowercase m for maritime, moist, or c for continental, dry; uppercase E equatorial, T tropical, P polar, A arctic. At the polar front, sixty to sixty-five degrees north, polar and subtropical air meet.
In practice
cP: continental polar.
Where people slip
Polar high, subtropical high: the anchor's named pressure cells.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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