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Formation | Pacific ITCZ |
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| Tropical cyclone formation also requires a trigger that initiates convection. One such trigger is the intertropical convergence zone (ITCZ), where warm sea-surface temperatures and convergence of surface trade winds foster convection (rising air). Conveniently, the ITCZ forms near the warmest surface waters.
You can see the ITCZ in the water-vapor image of the eastern Pacific below. |
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