The equatorial ocean's surface salinity is characteristically lower than the adjacent subtropical gyres due to the heavy rainfall associated with the Intertropical Convergence Zone (ITCZ), where intense atmospheric convection produces excess precipitation over evaporation, freshening the sea surface.
The equatorial ocean lies beneath the Intertropical Convergence Zone (ITCZ), a band of intense atmospheric convection that produces heavy rainfall exceeding evaporation in this region....
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