3a. What are the rules of the Coriolis Effect?

b. Be able to indicate the direction that wind will move in the upper and lower atmosphere, in the northern and southern hemisphere, around high and low pressure systems.

(A) The Coriolis force is the force that acts on an object due to the rotation of the earth. The basic rule of this force is that it causes the deflection of wind when it blows from one place to another. The magnitude of this Coriolis force directly depends upon the latitude at which the object is located. This force is maximum at the poles and minimum at the equator.

(B) - Correct answer is Option (2) i. e this force can indicate the wind direction in the northern and southern hemisphere,

When the air in a particular area becomes warm due to heating, then it becomes less dense and rises up. This area forms a low pressure zone. This low pressure zone is filled with the air from the high pressure zone. The wind that blows from the region of high pressure to the region of low pressure does not move in a straight line. Due to the Coriolis force, this wind gets deviate and reaches the low pressure zone.

Thus, this force indicates the direction from which a wind blows in both the southern and the northern hemisphere. In the southern direction it moves in anticlockwise direction, whereas in the northern hemisphere it moves in clockwise direction.