There is a high agreement between the CMIP6 projections and the previous findings that permafrost will undergo increasing thaw and degradation during the 21st century worldwide  . The CMIP6 models project that the annual mean frozen volume in the top 2 m of the soil could decrease by 10-40% for every degree increase of global temperature . The CMIP5-based equilibrium sensitivity of permafrost extent to stabilised global mean warming is established to be about 4.0 x 106 km2 °C-1 . The southern boundary of the permafrost is projected the move to the north: 1º-3.5º northward  at the level of 1.5℃ temperature rise .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report