Analyze the mechanics of ocean current deflection: Assertion (A): Surface ocean gyres in the Northern Hemisphere rotate in a clockwise direction, whereas gyres in the Southern Hemisphere rotate counter-clockwise. Reason (R): The Coriolis force deflects moving fluids to the right of their motion in the Northern Hemisphere and to the left in the Southern Hemisphere. Which of the following is correct?

💡 Solution & Explanation

The rotation direction of subtropical ocean gyres is a direct consequence of wind stress combined with the Coriolis effect. The Coriolis force acts at right angles to fluid motion, deflecting currents to the right in the northern hemisphere and to the left in the southern hemisphere, which drives the closed circular flow pattern around high-pressure oceanic centers. Both statements are scientifically accurate and directly linked through fluid dynamics. Ekman spiral transport further explains how surface wind energy is transferred downward through ocean water columns.