Which atmospheric effect propagates eastward during moderate El Niño events across the Pacific?

💡 Explanation

During El Niño, weakening trade winds trigger an eastward shift of warm water, causing the Walker circulation, normally characterized by rising air in the west and sinking air in the east, to reverse. Therefore, the Walker circulation reversal results, rather than amplification, intensification, or weakening, which are caused by separate climatic forcings.

• Which outcome results specifically near desert latitudes when an air mass descends?
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• Which outcome occurs when groundwater depletion lowers the potentiometric surface in soluble bedrock?
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