Climate Change is Not a Cliff, It's a Minefield

The extreme heatwaves and wildfires wreaking havoc around the globe are “the face of climate change,” one of the world’s leading climate scientists has declared, with the impacts of global warming now “playing out in real time.

  Emergency workers among damaged vehicles in a open parking area of northern Athens after a flash flood struck the Greek capital. Photograph: Angelos Tzortzinis/AFP/Getty Images 

Extreme weather has struck across Europe, from the Arctic Circle to Greece, and across the world, from North America to Japan. “This is the face of climate change,” said Prof Michael Mann, at Penn State University, and one the world’s most eminent climate scientists. “We literally would not have seen these extremes in the absence of climate change.”

“The impacts of climate change are no longer subtle,” he told the Guardian. “We are seeing them play out in real time and what is happening this summer is a perfect example of that.”

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The current heatwave has been caused by an extraordinary stalling of the jet stream wind, which usually funnels cool Atlantic weather over the continent. This has left hot, dry air in place for two months – far longer than usual. The stalling of the northern hemisphere jet stream is being increasingly firmly linked to global warming, in particular to the rapid heating of the Arctic and resulting loss of sea ice.

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 Other senior scientists agree the link is clear. Serious climate change is “unfolding before our eyes”, said Prof Rowan Sutton, at the University of Reading. “No one should be in the slightest surprised that we are seeing very serious heatwaves and associated impacts in many parts of the world.”

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“It is not going off a cliff, it is like walking out into a minefield,” he said. “So the argument it is too late to do something would be like saying: ‘I’m just going to keep walking’. That would be absurd – you reverse course and get off that minefield as quick as you can. It is really a question of how bad it is going to get.”