The “supersized” El Niño phenomenon, which is set to peak later this year, is plunging the planet into an extreme weather “danger zone”, UN chief Antonio Guterres warned Thursday.
According to him, El Niño is set to become “very strong” in the months ahead, with the weather phenomenon near certain to persist through to February.
“El Niño is being supersized before our eyes. The science leaves no room for doubt: the planet is in uncharted waters, and those waters are heating up. Sea surface temperatures are rising, temperatures keep climbing, and the world is in the danger zone of extreme weather,” Guterres said in a statement.
The World Meteorological Organization said El Niño would peak towards the end of this year — though its knock-on impacts for the climate will continue well into 2027.
“El Niño is firmly established and will intensify into a very strong event in the coming months, with big impacts on rainfall and temperature patterns and associated risks of floods, drought and extreme heat,” the WMO said.
El Niño is a natural climate phenomenon and is not caused by climate change.
But scientists expect it will exacerbate the heat of a planet already warming from burning fossil fuels, while amping up weather extremes.
“El Niño is being supersized before our eyes,” said UN chief Antonio Guterres.
“The science leaves no room for doubt: the planet is in uncharted waters, and those waters are heating up. Sea surface temperatures are rising, temperatures keep climbing, and the world is in the danger zone of extreme weather.
“The race now is between rising risks and our commitment to take climate action and protect people. We must win that race.”
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El Niño tends to peak late in the year, but heat in the oceans releases more slowly into the atmosphere, pushing up global temperatures the following year.
The hottest year on record is 2024, following the last El Niño.
“This exceptional El Niño… has the potential to deliver a massive blow to communities and economies across the world”, said WMO chief Celeste Saulo.
“We are already seeing disruption and devastation from droughts and floods, and we expect these impacts to increase as El Niño intensifies.”
She put disaster management authorities and climate-sensitive sectors like agriculture, health, energy and water on notice, saying there was “no time to lose” in getting ready.
El Niño warms surface temperatures in the central and eastern equatorial Pacific Ocean, bringing worldwide changes in winds, pressure and rainfall patterns.
It typically takes place every two to seven years and lasts around nine to 12 months.
Conditions oscillate between El Niño and its opposite La Niña, with neutral conditions in between.
“Fuelled by exceptionally warm ocean conditions across the tropical Pacific, El Niño is expected to strengthen further during the coming months to a very strong intensity,” the WMO said.
The UN agency classifies El Niño events as weak, moderate, strong, or very strong — meaning it is set to reach the highest level of the four.
The WMO said there was an “exceptionally high likelihood of nearly 100 percent” that El Niño will continue through to February.
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Pacific Ocean Heating Up
El Niño can reshape weather and climate patterns thousands of kilometres away from the tropical Pacific.
Every El Niño is different, but major events often follow familiar patterns. This includes drought across parts of the Amazon, Indonesia and Australia, disrupted monsoons in India, and shifting rainfall throughout the tropics.
For September-November, WMO forecasts indicate an increased likelihood of above-normal temperatures “across almost all land areas”, alongside rainfall patterns showing a “pronounced and classic atmospheric response to the strong Pacific El Niño”, the UN’s weather and climate agency said.
The index, which measures sea surface temperature anomalies in the central eastern equatorial Pacific, has strengthened from an average 1.5C above normal between May and July.
Weekly values between late July and mid-August ranged from around 2.2C to 2.6C above average, indicating continued El Niño intensification.
In some areas, subsurface ocean temperatures were more than 8C above average during July and early August.
AFP
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