Paris (ESA) May 15, 2023

Kelvin waves, a potential precursor of El Nino conditions in the ocean, are rolling across the equatorial Pacific toward the coast of South America. The most recent sea level data from the U.S.-European satellite Sentinel-6 Michael Freilich indicates early signs of a developing El Nino across the equatorial Pacific Ocean.

The data shows Kelvin waves – which are roughly 2 to 4 inches (5 to
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