Reference Terms
from Wikipedia, the free encyclopedia

Hadley cell

The major driving force of atmospheric circulation in the tropical regions is solar heating.

Because of the Earth's 23.5 ° axial tilt, the sun is never more than a few tens of degrees from directly overhead at noon in the tropics; as a consequence, incident solar radiation provides maximum energy at the equator.

Note:   The above text is excerpted from the Wikipedia article "Hadley cell", which has been released under the GNU Free Documentation License.
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