Which effect dominates airflow direction for air masses moving poleward beyond the subtropical jet?

💡 Explanation

When an air mass moves poleward, the Coriolis force deflects the air mass because Earth's rotation causes a velocity differential with latitude leading to deflection proportional to speed and latitude. Therefore, Coriolis deflection dominates, rather than gravity, viscosity, or buoyancy that generate weaker effects at those latitudes and speeds.

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