Answer and Explanation:
Atmospheric circulation is the large-scale movement of air and also through which heat is distributed on the surface of the Earth. It describes how air moves across the planet in a specific pattern. It is how heat is redistributed around the globe.
3 cells make up the Global Atmospheric Circulation Model which are the following:
1. Hadley
2. Ferrell
3. Polar
Polar Cell stretches over the North and South poles, having its boundary at around 60° North and South. Ferrell Cell stretches between 30° and 60° North and South and Hadley Cell stretches between the Equator (0°) and 30° North and South.
We assume the seasonal shift of wind to create the single-cell model of global circulation to create the three-cell model.
The movement of air is caused by heat differentiation. It means that the sun heats the earth unevenly and the Equator receives the most concentrated dose of heat.