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-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.
Transcript of Explain the forces that drive global circulation patterns an. Explain the forces that drive global circulation patterns and how those patterns determine weather and climate. Global climate patterns are driven by a combination of unequal heating of Earth by the Sun, atmospheric convection currents, the rotation of Earth and the Coriolis effect, Earthâs orbit around the Sun on a tilted axis, and ocean currents. The unequal heating of Earth is the driver of atmospheric convection currents.