Convergence zone

A convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions.

[3] As the two trade winds converge, the cool, dry air collects moisture from the warm ocean and rises, contributing to cloud formation and precipitation.

The low pressure area that is created by the movement of the trade winds acts as a vacuum, drawing in the cooler, dry air from high pressure areas (divergence zones), creating a convection cell commonly known as the Hadley Cell.

[3] Sea surface temperature is directly related to the position of the Sun or the location of the "energy flux equator," thus the ITCZ shifts corresponding to the seasons.

[5] The ITCZ is shifted farther south during the winter solstice (in the Northern Hemisphere), when the solar radiation is focused at 23.5°S.