The flow of air caused by and the coriolis effect creates distinct wind patterns on earth's surface.

Unequal heating of the earth surface.

Explanation:

Wind refers to the moving mass of air. It originates due to the unequal heating of the surface of the earth that takes place because of the heat energy provided from the Sun. This difference in the heating of the earth's surface give rise to the formation of the low pressure and the high pressure zone. The wind flows from the region of high pressure zone to a region of low pressure zone.

This wind flow is affected by the Coriolis force that comes into the picture because of the rotation of the earth, that allows the wind to move in a distinct pattern in both the hemispheres. It flows in clockwise manner in the northern and anticlockwise manner in the southern hemisphere.