Record-breaking El Niño could be a preview of Earth’s future. It’s not pretty

El Niño, an intense weather phenomenon, might give us a glimpse of Earth's future under even warmer conditions. This year's El Niño could become the strongest on record, potentially leading to extreme weather events such as prolonged droughts and intense storms, which could result in severe flooding. The strength of an El Niño is determined by the temperature of the ocean surface, which in turn affects atmospheric patterns.

Currently, this El Niño is occurring alongside already-record-high ocean temperatures and extreme heat, which could push global average temperatures above 2 degrees Celsius (3.6 degrees Fahrenheit) of warming. This threshold has been deemed the limit to avoid the "unpredictable and extensive damage" of climate change. Although there is no safe limit to global warming, every degree of temperature increase amplifies the impacts of climate change.

Experts note that while we're not yet at the +2-degree mark, the next 12 months could serve as a "stress test" of what a +2-degree world might look like, with record heat, extreme weather, crop losses, and cascading impacts. Robert Rohde, chief scientist for Berkeley Earth, likens this El Niño to a "time machine," as the warming it brings could be equivalent to what scientists predict for the year 2037.

However, there is a significant difference between El Niño and greenhouse gas-driven warming. While greenhouse gases trap heat and cause global warming, El Niño redistributes existing heat within the climate system, leading to unequal impacts across different regions. Some areas may experience record-breaking heat and excessive rainfall, while others may face cooler temperatures and altered precipitation patterns.

Thus, El Niño may provide a preview of some of the amplified impacts of a hotter Earth, but it won't fully replicate the global, human-induced warming caused by greenhouse gases.