Flexi Says: Global winds are winds that occur in belts that go all around the planet. Like local winds, global winds are caused by unequal heating of the atmosphere. Earth is hottest at the Equator and gets cooler toward the poles. The differences in heating create huge convection currents in the troposphere. At the Equator, for example, warm air rises up to the tropopause. When it can’t rise any higher, it flows north or south.