Topic explanation

Standard explanation

The three-cell model describes large-scale atmospheric circulation in each hemisphere using Hadley, Ferrell and Polar cells.

Key points

• Unequal heating → pressure differences → large-scale circulation
• Hadley Cell: Unequal solar heating creates large-scale atmospheric motion. Located mainly in tropical and subtro
• Ferrell Cell: Located in mid-latitudes. It lies between the Hadley and Polar cells.
• Three circulation cells in each hemisphere help move heat poleward.
• The three-cell model describes large-scale atmospheric circulation in each hemisphere using **Hadley, Ferrell and Polar

Labelled diagram