what drives hadley cell circulation quizlet
-HADLEY cell circulates air between topics and subtropics (approximates real world well). Warm air rises at the equator-As the flow moves poleward, it begins to cool and sinks at 20Â°-35Â° latitude.-Trade winds meet at the equator, in a region with a weak pressure gradient, called the doldrums.-FERREL cell circulates air in the middle latitudes. -Circulation (at 60Â°-90Â°) within a POLAR cell produces polar easterlies, or surface flows that move toward the equator.Trade winds meet at the equator, in a region with a weak pressure gradient, called the doldrums. -FERREL cell circulates air in the middle latitudes. -Circulation (at 60Â°-90Â°) within a POLAR cell produces polar easterlies, or surface flows that move toward the equator.