In the next five years, the Earth is overwhelmingly likely to surge again and again past the international climate threshold set as safe and shatter its hottest-year record along the way, according to new United Nations climate projections.
The World Meteorological Organisation also forecasts an overheating Arctic that warms nearly 3 degrees Fahrenheit (1.66 degrees Celsius) between now and 2030 and a dangerous drought with potential wildfires for the Amazon, a crucial part of Earth’s natural defences to lessen human-caused climate change.
The projections by the UN climate agency and the United Kingdom’s Meteorological Office said there’s a 75% chance that the average global temperature between 2026 and 2030 will exceed 1.5 degrees Celsius (2.7 degrees Fahrenheit) since pre-industrial times.
A UN science report a few years later detailed how exceeding that 1.5 mark means more likely death, danger and species loss. Even though it’s only a few tenths of a degree, some of the planet’s ecosystems, such as coral and glaciers, can’t handle the strain.
There’s a 91% chance that at least one of the next five years will shoot past the 1.5 degree threshold and an 86% chance that one of those years will smash the record for Earth’s hottest year set in 2024, the WMO report said. The WMO projects each year between now and 2030 to be between 1.3 degrees Celsius and 1.9 degrees Celsius since the late 1800s.
“It’s important to note that (1.5) is not kind of a cliff edge that we’re going to fall off,” said report co-author Melissa Seabrook, a climate scientist at the U.K. Meteorological Office. “Every kind of 0.1 of a degree has a more and more severe impact.”
She pointed to the unprecedented May heat in Europe this week.
An entire year or more above the 1.5 degree mark “means a whole range of extreme weather events, probably many so hot/wet/dry that it exceeds anything we’ve experienced in the past and thus crucially, anything our city planning, agriculture etc. has anticipated,” Imperial College of London climate scientist Friederike Otto said. “This will mean many people will lose their lives, we are in for a lot of food price shocks, and more intense wildfires.”
Nearly all the shorter-term forecasts call for a strong El Niño — a natural warming of parts of the central Pacific that alters weather worldwide and spikes global temperatures — to form soon. The WMO report said it could stretch all the way to 2028. Because of that, Seabrook said 2027 will likely break the 2024 heat record.
And if the next five years do average more than 1.5 degrees Celsius since pre-industrial times, that means Earth will have warmed a quarter of a degree Celsius (0.45 degrees Fahrenheit) in a decade, which is faster than the previous rates of warming. Those were closer to two-tenths of a degree Celsius per decade.
The report also forecasts Arctic sea ice to continue to shrink in the summer.
Associated Press