What is the origin of the jet streams?

Jet streams originate from the combination of the Earth's rotation and the uneven heating of its surface by the sun. These fast-flowing air currents form at the boundaries of different air masses, particularly between polar and tropical regions, where temperature gradients are strongest. The Coriolis effect, resulting from the Earth's rotation, helps shape and direct these streams. Jet streams typically occur in the upper levels of the atmosphere, influencing weather patterns and systems.