El Niño, a climate phenomenon marked by warmer-than-average Pacific Ocean waters near the equator, has commenced and is likely to escalate into a super El Niño later in 2026, with forecasters assigning more than a 60% probability to this development.
Originating from observations by 17th-century fishermen in Peru and Ecuador who noticed dwindling anchovy catches during warmer waters near Christmas, El Niño has since been identified as a natural cyclical event influencing global weather patterns.
From Warmer Waters to Global Weather Extremes
The warming of equatorial Pacific waters sets off a chain reaction affecting weather worldwide, including severe floods, droughts, and storms. However, the intensity and impact vary across regions, as seen in the 2023-24 El Niño, one of the strongest on record, which caused significant flooding in Brazil and contributed to 2024 becoming the hottest year recorded.
Climate experts note that while temperature indicators suggest a large event, the actual impacts remain complex and regionally diverse. The interaction between El Niño and pre-existing ocean warming due to climate change tends to amplify adverse weather effects.
The Role of Climate Change
Current El Niño events occur against a backdrop of already elevated ocean temperatures driven by climate change. This overlap exacerbates the severity of weather disturbances linked to El Niño, making storms, droughts, and floods more intense than in past cycles.
Looking Ahead
- Scientists continue to monitor indicators to predict El Niño’s trajectory and potential impacts.
- Understanding the nuances of El Niño’s effects is critical for global preparedness, especially in vulnerable regions.
- Climate change mitigation remains essential to reduce the compounded risks associated with super El Niño events.
For a detailed explanation of El Niño’s mechanisms and its implications, listen to experts on The Conversation Weekly podcast.
