Ferrel's law -Ferrel's law states that wind is deflected to the right in the Northern Hemisphere and to left in the Southern Hemisphere, derived from the effect of Coriolis effect to air masses.
The Coriolis force is an Inertial force that acts on objects that are in motion relative to a rotating reference frame. In a reference frame with clockwise rotation, the force acts to the left of the motion of the object. In one with anticlockwise rotation, the force acts to the right. Deflection of an object due to the Coriolis force is called the Coriolis effect.