Which mechanism causes coastal hyperaridity when cold ocean currents deflect equatorward?

💡 Explanation

When winds drive cold ocean currents toward the equator, the resulting air-sea temperature contrast promotes atmospheric subsidence which prevents cloud formation, due to an inversion layer inhibiting convection. Therefore subsidence inversion causes hyperaridity, rather than increased evaporation, cyclogenesis, or reduced upwelling – which have opposite effects or require different conditions.

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