El Niño 2026 Strongest in 1,000 Years, Study Finds

El Niño events have become the strongest they have been in 1,000 years, according to new research from the University of Michigan. The study, which reconstructed ocean surface temperatures over the last millennium using fossilized corals from the Galápagos Islands, was published in the journal Science. Researchers observed a significant recent increase in the variability of sea surface temperature in the eastern equatorial Pacific, a finding that surpasses previous paleorecords. This increase in variability is also concurrent with rising global temperatures and is attributed to more powerful El Niño events. Lead study author Julie Cole, an environmental scientist at the University of Michigan, stated that while strong El Niño events have been observed in the late 20th and early 21st centuries, their unusual nature was not previously understood. Cole noted in The Conversation that, on average, El Niño events over the past four decades have exhibited higher temperatures than at any point in the preceding millennium, leading to more pronounced weather impacts. The equatorial Pacific Ocean has experienced dramatic warming in 2026, signaling the commencement of a robust and potentially historic El Niño. This phenomenon is expected to influence weather patterns not only within the Pacific region but also across the United States and globally, as El Niño events grow in intensity and destructiveness. The findings offer a long-term perspective for comprehending the Pacific El Niño–Southern Oscillation (ENSO) and its ongoing effects on ecosystems, infrastructure, and human populations worldwide. The National Oceanic and Atmospheric Administration’s (NOAA) Climate Prediction Center corroborates these findings, reporting that El Niño is intensifying and has a greater than 90% probability of developing into a "very strong event" in the Northern Hemisphere during the 2026 hurricane season, which spans the fall and winter months. El Niño is characterized as a complex weather pattern involving the warming of the ocean surface, defined by sea surface temperatures that are above average in the Pacific Ocean. This warming occurs when the trade winds, which typically blow from west to east, weaken. The study's methodology involved analyzing the chemical composition of ancient coral skeletons, which preserve records of past ocean temperatures. By examining these proxies, scientists can reconstruct historical climate conditions with a high degree of accuracy. The implications of this research extend to climate modeling and forecasting, providing crucial data for predicting future weather extremes and their societal impacts. The increased frequency and intensity of El Niño events are consistent with broader climate change trends, highlighting the interconnectedness of global climate systems.