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El Nino's Return: Record Heat Ahead?
2 Mar
Summary
- El Nino may form later this year, potentially breaking global temperature records.
- A 50-60% chance of El Nino developing exists from July onwards.
- El Nino influences global weather by altering ocean currents and wind patterns.
The climate phenomenon El Nino has a 50- to 60-percent chance of forming between July and September 2026, according to the U.S. National Oceanic and Atmospheric Administration (NOAA). This development could lead to record-breaking global temperatures. El Nino is a phase of the El Nino-Southern Oscillation (ENSO) and influences weather by weakening trade winds and warming central and eastern Pacific waters.
This oceanic warming releases energy into the atmosphere, temporarily increasing global temperatures. El Nino events typically occur every two to seven years and cause drier conditions in some regions like southeast Asia and Australia, while bringing wetter conditions to others, such as the Horn of Africa and the southern United States. The last El Nino contributed to 2023 and 2024 being among the hottest years on record.
Scientists note that El Nino's impact on global temperatures can take time to manifest, with potential effects being more pronounced in subsequent years. For instance, if El Nino develops later in 2026, its full impact might be felt more strongly in 2027. However, a continued global warming trend means that even without El Nino, record-breaking warm years are still a possibility.
The contrasting phase, La Nina, cools the eastern Pacific and typically lasts one to three years, producing opposite weather effects globally. The most recent La Nina episode, which began in December 2024, was relatively weak and is expected to enter a neutral phase soon. NOAA has also updated its methodology for identifying El Nino and La Nina events using the Relative Oceanic Nino Index (RONI) for more accurate real-time tracking.
