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In July of this year, during record-smashing heat waves and forest fires, a group of scientists published “Trajectories of the Earth System in the Anthropocene,” exploring the risk that climate feedbacks could lead to runaway heating and a “Hothouse Earth.”
A study published in the Proceeding of the National Academy of Sciences tells a tale of two Earths. In one, humans are able to rein in global warming, and in the other, temperatures would be irreversibly warmer than pre-industrial levels, by 4 to 5 degrees Celsius. How societies act in the next few decades could determine the trajectory of our planet.
Report predicting spiralling global temperatures has been downloaded 270,000 times in just a few days
A domino-like cascade of melting ice, warming seas, shifting currents and dying forests could tilt the Earth into a “hothouse” state beyond which human efforts to reduce emissions will be increasingly futile, a group of leading climate scientists has warned.
It may sound like the title of a low budget sci-fi movie, but for planetary scientists, “Hothouse Earth” is a deadly serious concept.
We could be on the verge of triggering a series of cascading tipping points that result in the planet warming 4 or 5°C hotter than the pre-industrial benchmark.