A group of international scientists reviewed climate literature to identify 41 climate feedback loops, 27 of which are accelerating global warming.
One instance of a positive feedback loop is that warming in the Arctic has led to melting sea ice, which has prompted even more warming because water has a darker surface than ice and therefore absorbs more heat.
These positive feedback loops, which can be large and difficult to quantify, threaten to cause a permanent shift away from Earth's current global climate, researchers warned. For instance, warming in the Arctic has led to melting sea ice, which has prompted even more warming because water has a darker surface than ice and therefore absorbs more heat.
"Consequently, the effects of greenhouse gas emissions could be underestimated and strong climate mitigation policies are needed," Wolf added. "That is yet another reason to accelerate action to limit global warming – because that also limits how much it is going to get amplified by the feedbacks in the climate system," Lenton said.
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