A study of rocks exposed by melting ice shows that Andean glaciers have retreated further now than at any time since Earth’s last interglacial period
Mountain glaciers in the Andes are almost certainly the smallest they have been for at least 130,000 years, a study of rocks exposed by the melting ice has found.at the University of California, Berkeley. “I think this is clear evidence that at least one region in the world has now departed the hospitable climatic conditions that have fostered the development of human civilisation.”The Andes mountain range is so high up that there are permanent glaciers in many places, even in tropical areas.
While the shrinking of northern glaciers in the mid-interglacial was a regional rather than global phenomenon, the researchers expected to find something similar in the Andes at that time. Instead, levels of the isotypes they found were so low that they were almost undetectable. “We’re quickly blowing past climate milestones that we thought were decades away,” he says. “We chose the specific locations that we sampled at these glaciers with the implicit assumption that these glaciers were not smaller than they have ever been in human history.”
While the study doesn’t say this, Gorin agreed when asked that this means Andean glaciers have almost certainly shrunk to the smallest they have been since at least the previous interglacial, around 130,000 years ago.
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