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Ocean Surface Topography from Space
Higher-than-normal Sea Level
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June 25, 1997

In June, the white area of high sea level began to spread along the coasts of both the North and South America.

Because higher-than-normal sea level corresponded to warmer-than-normal water, the fishermen in Peru began to feel the impact: the warm water prevented upwelling of cold, nutrient-rich water that is necessary for abundant fish harvests.

Source: Jet Propulsion Laboratory

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