Upon close inspection of prevailing winds and pressure regions, it was concluded
that there are actually three cells. The existence of these cells is driven
by the Coriolis effect (see next page). The three act like gears, each assisting the
one next to it. Moving from the equator to the poles, we notice:
Equatorial Low, or Intertropical Convergence Zone (ITCZ) where winds converge
on the equator and warmed air rises.
Subtropical High where cooler air sinks to create a high pressure region.
Subpolar Low where air rises. The exact nature and strength of this
region is not as well understood. The two convection cells on either side are
also not that strong, and are more theoretical than real.
Polar High where cool air descends to create another high pressure
zone.
