Atmospheric Cells — Hadley, Ferrell, Polar

Unequal solar heating creates large-scale atmospheric motion. Located mainly in tropical and subtropical regions. Warm air rises near the equator, moves poleward aloft, cools and sinks in subtropical regions.

Located in mid-latitudes. It lies between the Hadley and Polar cells.

Located at high latitudes. Cold dense air tends to sink near the poles and participates in circulation toward lower latitudes. These cells help redistribute thermal energy from low to high latitudes.

No single simple equation defines the three cells. Conceptually: **Unequal heating → pressure differences → large-scale circulation**