December 6, 2024
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Why ‘Tipping Points’ are the wrong way to talk about Climate Change
A new paper warns that the concept of “points” does little to encourage climate action from people and policymakers.
Meltwater flows from the ice on an exposed part of the Aletsch Glacier near Bettmeralp, Switzerland, on August 22, 2019.
KLIMAWIRE | Unstoppable ice loss in Antarctica. Irreversible thawing of permafrost in the Arctic. Blackout of a giant current in the Atlantic Ocean.
Scientists warn that these and other “tipping points” in Earth’s climate system lie ahead if global temperatures continue to rise. But there is still considerable uncertainty as to how and when the planet might cross these dangerous thresholds.
And without clearer public notice of exactly what a tip is—and what can be done to avoid it—the whole concept may not be all that useful in promoting climate action.
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That is the warning that is presented new perspective paperpublished Tuesday by a team of scientists, policy experts and communications specialists in the journal Nature Climate Change. Hidden points have captured the public imagination for years, they say, but it’s not clear the concept is driving significant policy change.
That’s partly due to widespread confusion about what a tipping point actually is, the paper suggests.
Early scientific literature on the subject presented the idea that certain aspects of Earth’s climate system may have physical limits, and once the point of no return is crossed, these systems fall into a death spiral of unstoppable and irreversible change.
Research suggests that enough warming and drought in the Amazon, for example, could cause ecosystem conversion. uncontrollable transformation from lush jungle to dry grassland.
But over the years, as the concept has become more popular, researchers have begun to apply the cutting-edge framework to many other scientific and social systems. Papers are beginning to suggest that there are points from energy pricing systems to humans. eating habits.
The authors suggest that uncertainty about the probability of climate tipping points is another source of public confusion.
The Intergovernmental Panel on Climate Change, the UN’s leading authority on climate science, has warned possible tipping points In the Earth’s climate system. But some are more likely than others, and many are shrouded in uncertainty; in other words, scientists don’t know how close we are to reversing them.
This makes it difficult to communicate the severity of tipping point threats or to encourage near-term action to prevent them.
If scientists knew for sure that the Antarctic ice sheet would melt rapidly and uncontrollably with global warming of 1.5 degrees, policymakers would be more inclined to implement emergency measures to keep temperatures below that threshold.
But almost all global tipping point thresholds have wide uncertainty as to when they will actually occur, if ever.
Instead, the authors argued, tangible and immediate climate emergencies—such as extreme weather events, which are worsening globally as temperatures rise—are likely to instill a greater sense of urgency among policymakers and citizens.
This does not mean that the tipping point can still be a useful concept in public messages about climate change, the authors add. But scientists should communicate more clearly about their definitions and uncertainties.
That’s because climate tipping points are still a big threat, even if their exact thresholds are still uncertain.
A last year’s main report – with contributions from more than 200 scientists – it warned of 26 possible tipping points around the world, affected by systems ranging from ice sheets to tropical clouds.
The report notes that this is an issue that requires further research and understanding.
“We know enough to identify the threat of tipping points in the Earth system that requires an urgent response. In fact, our best models probably underestimate the risks of tipping over,” he said. “The world is largely flying blind to this great threat.”
Reprinted E&E News Courtesy of POLITICO, LLC. Copyright 2024. E&E News provides essential news for energy and environmental professionals.
