Which is the initial major effect of an el niño? cold offshore waters are replaced by warm nutrient-rich equatorial waters. warm offshore waters are replaced by cold equatorial waters. warm nutrient-rich equatorial waters are replaced by cold offshore waters. cold nutrient-rich offshore waters are replaced by warm equatorial waters.

Cold nutrient-rich offshore waters are replaced by warm equatorial waters.

Explanation:

The phenomenon of El Niño or simply El Niño, sometimes referred to as the El Niño phenomenon (FEN), is a phenomenon or climate event related to the warming of the equatorial eastern Pacific, which manifests itself erratically cyclical -Arthur Strahler speaks of cycles of three and eight years-, which consists in reality in the warm phase of the equatorial Pacific climate pattern called El Niño-Southern Oscillation (El Niño-Southern Oscillation, ENSO), where the cooling phase receives the name of The girl. This phenomenon, in its most intense manifestations, causes havoc in the intertropical and equatorial zone due to intense rains, affecting mainly the Pacific coastal region of South America.

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