High pressure areas are usually caused by air masses
being cooled, either from below (for instance, the subtropical high pressure
zones that form over relatively cool ocean waters to the west of California,
Africa, and South America), or from above as infrared cooling of winter air
masses over land exceeds the warming of those air masses by sunlight.
So the correct answer would be “D”- Air being cooled
over cool land and then sinking
Apr 9th, 2015
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