The Hadley cell is a movement of warm air heated by the radiation from the sun hitting the surface of the Earth near the equator. The movement of air in the Hadley cell results in the formation of the trade winds moving from the northeast toward the west in the Northern Hemisphere at the equator.In each hemisphere, there is one primary circulation cell known as a Hadley cell and two secondary circulation cells at higher latitudes, between 30° and 60° latitude known as the Ferrel cell and beyond 60° as the Polar Cell. Each Hadley cell operates between zero and 30 to 40 degrees north and south and is mainly responsible for the weather in the equatorial regions of the world., The upward branch of the Hadley cell occurs not directly over the equator but rather in the summer hemisphere. In the upward branch is slightly offset into the northern hemisphere, making way for a stronger Hadley cell in the southern hemisphere. This evidences a small net energy transport from the northern to the southern hemisphere.[