Climate change intensifies El Niño frequency and strength, study finds

A recent study published in the scientific journal 'Science' indicates that human-induced climate change is significantly intensifying the El Niño phenomenon, a natural climate pattern. Researchers analyzed sea surface temperature data from coral records in the Galapagos Islands over the past millennium to reconstruct the history of the El Niño-Southern Oscillation (ENSO).

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Climate change has increased the frequency and intensity of El Niño.

The study found that ENSO variability, which drives El Niño and La Niña events, has increased dramatically since the onset of industrialization in the 19th century. The variability in the last 40 years has been particularly pronounced, showing a 36.5% increase compared to pre-industrial times and a 16.2% increase compared to the 20th century. This suggests that artificial climate change, driven by greenhouse gas emissions, is pushing the Earth's climate system towards extreme conditions.

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The extreme phenomena of El Niño-Southern Oscillation are amplified and intensified by climate change, in addition to ocean warming, causing enormous economic losses, ecosystem destruction, and human suffering worldwide.

El Niño events, characterized by warmer-than-average sea surface temperatures in the central and eastern Pacific Ocean, can lead to severe weather events such as droughts and floods globally, causing significant economic losses, ecological damage, and human suffering. The current "super El Niño" event, which officially began in June, is showing alarming temperature increases, raising the probability of it becoming one of the strongest on record.

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Although this paper is not research that can directly link the cause of recent El Niño intensification to global warming, considering that the observed El Niño intensification and the changes in climate model simulations due to greenhouse gas increases align very well, the possibility that global warming is having an effect is strongly suspected.

While the World Meteorological Organization has previously stated there is no definitive evidence directly linking climate change to the frequency or intensity of El Niño, this new research provides strong correlational evidence. Professor Guk-jong Seong of Seoul National University noted that while the study doesn't directly prove causation, the strong alignment between observed El Niño intensification and climate model simulations of greenhouse gas increases makes the influence of global warming highly suspected. The findings underscore the need to monitor potential increases in extreme weather events in regions like the Korean Peninsula due to more frequent and powerful El Niños.

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There is a need to pay more attention to the possibility of super El Niño events like this year becoming more frequent in the future and the resulting changes in temperature, precipitation, and extreme climate in Korea.