A 'super' El Niño may be on the way. Here's how it will impact summer weather

Summer

Hottest of the four temperate seasons

Summer or summertime is the hottest and brightest of the four temperate seasons, occurring after spring and before autumn. At or centred on the summer solstice, daylight hours are the longest and darkness hours are the shortest, with day length decreasing as the season progresses after the solstice....

Pacific Ocean

Largest ocean

The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It stretches from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is bounded by the continents of Asia and Australia in the west and the Americas in t...

Climate

Long-term weather pattern of a region

Climate is the long-term weather pattern in a region, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteorological variables that are commonly measured are temperature, ...

Weather and Forecasting

Academic journal

Weather and Forecasting is a scientific journal published by the American Meteorological Society. It includes articles on forecasting and analysis techniques, forecast verification studies, and case studies useful to forecasters. Common topics include reports on changes to the suite of operational n...

Climate change

Human-caused changes to climate on Earth

Present-day climate change includes both global warming—the ongoing increase in global average temperature—and its wider effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to Earth's climate. The modern-day rise in global temperatures is dri...

Why It Matters

A 'super' El Niño poses significant risks to global food security, water management, and infrastructure by reversing typical seasonal weather patterns. This event affects a wide range of stakeholders, including farmers planning harvests, utility companies managing power grids, and emergency services preparing for natural disasters. Furthermore, the heat associated with these events could push global average temperatures to record-breaking highs, exacerbating the effects of climate change. Supply chains may also face severe disruptions due to unpredictable weather affecting transportation and production routes.

Context & Background

• El Niño is the warm phase of the El Niño Southern Oscillation (ENSO) cycle, characterized by warming sea surface temperatures in the central and eastern Pacific Ocean.
• The term 'super' El Niño is reserved for events of extreme magnitude, with only four such instances recorded since reliable record-keeping began in 1950.
• The most recent comparable event occurred in 2015-2016, which contributed to record-breaking global temperatures and widespread climatic anomalies.
• Typical El Niño events occur naturally every two to seven years, but 'super' events are statistical outliers with much more severe impacts.
• These climate patterns influence atmospheric pressure and precipitation, creating a domino effect that alters weather across the globe.

What Happens Next

Meteorological agencies will continue to closely monitor atmospheric pressure and sea surface temperatures to confirm the intensity of the developing system. Governments and industries are expected to activate contingency plans to mitigate risks related to flooding, droughts, and extreme heat over the upcoming summer. If the event intensifies as predicted, global temperature records may be challenged, potentially leading to renewed discussions on climate resilience.

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