NASA spots El Niño precursor from space: 'If it’s a big one, the globe will see record warming'
The Sentinel-6 Michael Freilich satellite recorded Kelvin waves moving eastward across the Pacific — a phenomenon often considered a precursor to El Niño.
TroibNews 
The Sentinel-6 Michael Freilich satellite recorded Kelvin waves moving eastward across the Pacific — a phenomenon often considered a precursor to El Niño.
