Fast-melting alpine permafrost may contribute to rising global temperatures
From the ancient sludge of lakebeds in Asia's Tibetan Plateau, scientists can decipher a vision of Earth's future. That future, it turns out, will look very similar to the mid-Pliocene warm period -- an epoch 3.3 million to 3 million years ago when the average air temperature at mid-latitudes rarely dropped below freezing.
"We wanted to estimate the stability of modern permafrost globally in a warmer-than-today climate scenario," said Feng Cheng, the paper's lead author and a professor at Peking University in China. Cheng formerly worked with Garzione as a postdoctoral fellow."Our findings were very surprising and highlight the fact that we need to put more effort into monitoring the stability of the permafrost in the alpine region.
The Tibetan Plateau, which sits at an elevation over 15,400 feet, is the largest alpine permafrost region on Earth, but others can be found in the Mongolian Plateau in central Asia, the Canadian and American Rocky Mountains, the southern stretches of the Andes, and other mountain ranges worldwide at elevations where the air temperature is consistently below freezing.
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