Simple ocean-based model forecasts a powerful El Niño, over 2 °C warmer than normal

For decades, scientists have worked to improve predictions of El Niño-Southern Oscillation (ENSO), a climate powerhouse that can cause droughts, flooding, marine heat waves, and more around the world. Researchers from the University of Hawai'i at Mānoa have published a study in Geophysical Research Letters showing that they can skillfully predict El Niño and La Niña 15 months ahead of time using only observations of the ocean surface temperature and height—no complex climate model needed.