Consider the following statements regarding winds 1. The air at ITCZ rises and moves towards poles in the upper atmosphere and sinks near 30 degrees in both hemispheres and then again moves toward the equator at the surface, this cycle is known as Walker Cycle. 2. At polar latitudes the cold dense air subsides near the poles and blows towards middle latitudes as the polar easterlies. This cell is called the polar cell. Which of the statements given above is/are correct? Correct Answer Only 2 The correct answer is Only 2. Three major cells are formed due to the movement of air on earth- Hadley Cell - The air at ITCZ rises and moves towards poles in the upper atmosphere and sinks near 30 degrees in both hemispheres and then again moves toward the equator at the surface, this cycle is known as Hadley Cell. Hence statement 1 is incorrect. In both hemispheres, At polar latitudes, the cold dense air subsides near the poles and blows towards middle latitudes as the polar easterlies. This cell is called the polar cell. Hence statement 2 is correct. At 30 degrees in both hemispheres, cold air sinks and at the surface they flow toward poles and near 60 degrees they again rise, this circulation is called as Ferrel Cell. Walker circulation is caused by pressure gradient occurring by the high pressure of the eastern Pacific Ocean and low pressure over Indonesia.