concept

Intertropical Convergence Zone

The belt around the equator where the trade winds of the two hemispheres meet, forcing warm moist air upward. This is the rising branch of the Hadley cell: water vapour condenses and falls as near-daily rain, which is why Earth's densest rainforests cling to it. On a slow-spinning world like Pandora, that rain belt broadens into a vast tropical band rather than a narrow stripe.