Sea level height data collected between March and May 2026 by the international Sentinel-6 Michael Freilich satellite has revealed a significant phenomenon in the Pacific Ocean. A displacement of warmer, higher-sea-level water has been observed moving from the western Pacific towards the coasts of Colombia, Ecuador, and Peru. This event is a clear indication of a warm Kelvin wave, a well-known precursor to the El Niño climate phenomenon.

Oceanic Kelvin waves are gravity waves that propagate eastward along the equator, carrying temperature and sea level anomalies. The detection of this warm Kelvin wave by Sentinel-6 Michael Freilich is crucial for monitoring and predicting El Niño, a climate pattern that has significant global impacts on weather, fisheries, and agriculture. The satellite's ability to precisely measure sea surface height allows scientists to track these phenomena with valuable lead time.

This finding underscores the importance of satellite Earth observation missions for understanding our planet's complex climate systems. The information provided by Sentinel-6 Michael Freilich, designed to measure ocean surface topography with millimeter precision, is fundamental for improving climate models and seasonal projections, enabling better preparation for the effects of El Niño in affected regions.