During an El Niño event, upwelling along the Peruvian coast is strengthened and cool water is carried far westward in an equatorial plume.

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During an El Niño event, the upwelling along the Peruvian coast is weakened, which reduces the amount of cool water that is carried westward in the equatorial plume. Instead, warm water from the western Pacific is pushed eastward, leading to changes in the ocean and atmospheric circulation patterns that affect global weather patterns.

During an El Niño Event, Upwelling Along the Peruvian Coast