Fig. 1From: Mitigating dry season food insecurity in the subtropics by prospecting drought-tolerant, nitrogen-fixing weedsGlobal water dynamics. Global rainfall patterns, temperature, Earth’s curvature, and rotation influence the formation of deserts in the subtropics. As the Earth rotates, convection currents carry moisture from the subtropics to the Tropics where heat causes the air to rise, and moisture to condense, leading to rainfall near the equator and dry zones in the flanking subtropicsBack to article page