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Inter-Tropical Convergence Zone (ITCZ)

The intertropical convergence zone is a trough of low pressure in the tropics that circles the globe in an east-west direction. Its location shifts roughly between 23.5 degrees north and south latitude and tends to follow the subsolar point over the course of the year. The low pressure results from the intense heating of the vertical rays of the sun, which causes the warm air to ascend and causes the northeast and southeast trade winds to converge on the zone of lifting. The warm air is extremely humid, and as it rises along the convergence zone, the air cools and the moisture condenses, forming precipitation. The ITCZ represents the primary engine of the global circulation of the atmosphere, since it is the only global ...

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