An international research team led by Dr. Guo Donglin from the Institute of Atmospheric Physics of the Chinese Academy of Sciences has revealed the extent of near-surface (about 3–4 m depth) permafrost during the mid-Pliocene warm period (about 3.264–3.025 million years ago). The findings, published in Proceedings of the National Academy of Sciences on Aug. 28, provide insights in understanding future permafrost change.
Click here for original story, Past warm period reveals limited near-surface permafrost extent
Source: Phys.org