When weather conditions are disrupted by el nino how does this affect ocean nutrients

Oceans upwelling decreases, reducing levels of nutrient-rich water

Explanation:

Typically, trade winds blow from east to west in the Pacific pushing warm surface ocean waters towards Asia. This causes upwelling of cold ocean currents from the depths of the oceans on the west coast of South America bringing up nutrients from the depths.

During Elnino, however, these trade winds weaken, and predominant winds blow eastwards, reducing this upwelling of colder deeper waters.

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