what are hadley cells and how do they work?

Answer 1

Technically, a Hadley cell is the one between
about 5 and 30 degrees latitude that transports air
southward near the surface and northward aloft. It
is one of three cells between the equator and pole.
The Hadley cell and the cell near the pole have similar
circulations. The cell in the mid-latitudes transports
air northward near the surface and southward aloft.
The Hadley cell creates the trade winds in the tropics.

Answer 2

Try this link out.

Answer 3

as above