Which effect is directly intensified when El Niño-Southern Oscillation (ENSO) causes a temporary reversal of the Walker circulation?

💡 Explanation

When El Niño reverses the Walker circulation, it reduces vertical wind shear in the central Pacific, because the typical east-to-west atmospheric pressure gradient weakens, favoring the formation and intensification of tropical cyclones. Therefore cyclone risk increases, rather than affecting sequestration, upwelling which are suppressed, or thermocline development which is influenced by many other factors.

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