What is a Super El Nino? How will it influence the global weather — Intensity and impact

Growing chatter around a potential super El Niño has captured global attention, with warnings of rising temperatures and extreme weather. However, climate scientists say that while an El Nino event is increasingly likely, the idea of a so-called “super El Nino” remains uncertain and, in many cases, overstated.

Experts, including researchers at the University of Virginia, note that seasonal forecasts are still evolving, and predictions made during the spring carry a higher degree of uncertainty, as per a report by Virginia news.

What is El Niño and why is it important?

El Niño is a naturally occurring climate phenomenon marked by the warming of ocean surface temperatures in the central and eastern Pacific Ocean. It typically occurs every two to seven years and can significantly influence global weather patterns.


During normal conditions, cooler waters dominate the eastern Pacific near South America, while warmer waters remain in the western Pacific near Indonesia. In an El Niño phase, this temperature gradient weakens as warmer waters spread eastward.

Scientists say this shift can disrupt atmospheric circulation, affecting rainfall, storms, and temperatures worldwide. The phenomenon often leads to warmer global conditions and can intensify extreme weather events such as floods and heatwaves.

‘Super El Niño’ — science or speculation?

While the term super El Niño has gained traction in media reports, experts emphasise that it is not an official scientific classification. Instead, El Niño events are measured using the Oceanic Niño Index (ONI), which tracks sea surface temperature anomalies.

According to the National Oceanic and Atmospheric Administration (NOAA), El Niño conditions are declared when ocean temperatures rise at least 0.5°C above average for a sustained period. Events are then categorised as weak, moderate, or strong based on the degree of warming.

A “super” El Niño is generally an informal way of referring to a strong event, typically when temperature anomalies exceed 1.5°C. However, scientists caution that current forecasts do not definitively support such an extreme scenario.

NOAA estimates a 62 per cent probability of El Niño developing during the summer, but also notes that projections of its eventual strength remain highly uncertain.

Why forecasts remain uncertain

Meteorologists highlight that spring is the least reliable time to predict El Niño development. Despite signals such as warming subsurface ocean temperatures and weakening trade winds, there is still considerable variability in how the phenomenon may evolve.

Recent climate patterns have further complicated predictions. While strong El Niño events occurred in 2015–16 and 2023–24, the past two decades have also seen prolonged La Niña phases, which are characterised by cooler-than-average Pacific waters.

This mixed behaviour has puzzled scientists, raising questions about whether long-term climate change is altering natural cycles.

Global impact: Heat, rain and extreme weather

If El Niño develops, it is likely to push global temperatures higher. Historically, El Niño years are among the warmest on record due to the additional heat released from the ocean into the atmosphere.

Scientists estimate that a typical El Niño can temporarily raise global temperatures by about 0.1 to 0.2 degrees Celsius. While this may seem modest, it can amplify existing warming caused by human-driven climate change.

A warmer atmosphere can hold more moisture, around 7 per cent more for every 1°C rise, leading to heavier rainfall and increased flooding risks in some regions. At the same time, tropical areas may face intensified heatwaves.

The last El Niño event, which lasted from mid-2023 to early 2024, contributed to record-breaking global heat, widespread wildfires, and severe flooding in multiple parts of the world.

El Niño vs La Niña: Key differences

El Niño and La Niña are opposite phases of the same climate system. While El Niño brings warmer ocean conditions in the eastern Pacific, La Niña is marked by stronger trade winds that push warm water westward, allowing cooler water to rise to the surface in the east.

La Niña events generally have a cooling effect on global temperatures, though their regional impacts can still be significant.

Scientists note that the recent transition from a La Niña phase increases the likelihood of El Niño forming, but also raises questions about whether there has been enough time for the ocean to accumulate the heat needed for a truly strong event, as per a report by Euro News.

Is climate change influencing El Niño?

Researchers are increasingly examining whether climate change is altering the frequency or intensity of El Niño events. Some studies suggest that rising global temperatures may be accelerating ocean warming, potentially affecting how quickly such events develop.

However, experts caution that more research is needed to establish clear links. The broader concern, they say, is the rapid pace of ocean surface warming, which could amplify the impacts of natural climate cycles like El Niño.

FAQs

What is a super El Niño?

A super El Niño is an informal term used to describe a very strong El Niño event, though it is not an official scientific category.

Will a super El Niño occur this year?

There is a strong chance of El Niño forming, but its intensity remains uncertain, with no confirmation of a “super” event.