Which mechanism modifies global precipitation patterns during an El Niño event's mature phase?

💡 Explanation

During El Niño, the weakening of trade winds reduces upwelling in the eastern Pacific because surface waters become warmer, diminishing the usual temperature gradient. Therefore, weakening trade winds and upwelling influence precipitation by altering atmospheric circulation, not strengthened jet streams, heat transport, or ozone formation.

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• Which consequence results when rapid aggradation overwhelms river levees?
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• Which chemical process is enhanced when upwelling occurs within ocean gyres?