Why many scientists are now saying climate change is an all-out ‘emergency’

On Monday, scientists released a paper showing that the world’s “carbon budget” — the amount of greenhouse gas emissions the world can still emit without boosting global temperatures more than 1.5 degrees Celsius — has shrunk by a third. The world only has 6 years left at current emissions levels before racing past that temperature limit.

“There are no technical scenarios globally available in the scientific literature that would support that that is actually possible, or can even describe how that would be possible,” Joeri Rogelj, a climate scientist at Imperial College London, told reporters in a call.

Tim Lenton, one of the co-authors on Ripple’s most recent paper and a professor of earth system science at the University of Exeter, said that 2023 has been filled with temperatures so far beyond the norm that “they’re very hard to rationalize.” “This isn’t fitting a simple statistical model,” he said.

Lenton said he isn’t afraid to use terms like “emergency” or “climate and ecological crisis.” “If you say ‘urgent’ to a politician … that isn’t really enough,” he said.

The language has spilled into academic publications as well. As recently as 2015, only 32 papers in the Web of Science research database included the term “climate emergency.” In 2022, 862 papers contained the phrase.

It wasn’t always this way. In the 2000s and even early 2010s, most scientists shied away making any statements that could be seen as “political” in nature. Jacquelyn Gill, a professor of climate science and paleoecology at the University of Maine, said that when she was doing her PhD in the late 2000s, senior academics warned her against deviating at all from the science when interacting with the media or the public.