El Niño can be seen in sea surface height, as warmer waters pile up due to weakening trade winds, raising sea level.
This map shows sea surface height anomalies from the Sentinel-6 Michael Freilich and Sentinel-3B satellites for June 1-10, 2023. https://go.nasa.gov/3JokwXH
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El Niño Returns
The climate phenomenon emerged in late spring 2023, as waters grew warmer and sea levels rose higher than usual in the tropical Pacific Ocean.go.nasa.gov