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The winds move in a straight line from north to south, or south to north from the temperate the tropic zone. But actually, the winds move slightly to the right (towards east) in the northern hemisphere and to the left (towards the west) in the southern hemisphere. This is because of the impact of Earth’s rotation on its own axis. This effect is called the Coriolis Effect, having ‘0’ effect near the equator and maximum effect near the poles.

Thus, the atmosphere is always in circulation all around the world. The winds play a very important role in the weather and climate patterns around the world. This wind makes this Coriolis effects. The main effects of Coriolis force are:

• The most important effect of the Coriolis force in terms of geography is the deflection of winds and currents in the ocean. It also has a considerable effect on man-made items like planes and missiles. In terms of affecting the wind, as air rises off of the earth’s surface, its speed over the surface increases because there’s less drag as the air no longer has to move diagonally the earth’s many types of landforms. Because the Coriolis force increases with an item’s growing speed, it significantly deflects air flows and as a result the wind.

• The Coriolis force also affects the movement of the ocean’s currents. Many of the ocean's largest currents circulate around warm, high-pressure areas called gyres. Though the circulation is not as important as that in the air, the deflection caused by the Coriolis Effect is what creates the spiralling pattern in these gyres.