We used Exiguobacterium sibiricum strain 255-15, a psychrotrophic bacterium from 3 million year old Siberian permafrost that grows from -5°C to 39°C to study its thermal adaptation.
Permafrost that is frozen hard supports the ground surface, almost the way a concrete pillar supports a building.
The permafrost that helps hold the state's mountain peaks together is also thawing rapidly, leading to a rise in the number of giant rock and ice avalanches.
Moreover, the warming reduces the effect of permafrost that once acted as a sort of glue binding together the mass of the mountains.
Under the corporate rubric of "energy independence," the company hopes to drill through the permafrost, a scheme that promises shivers that have nothing to do with the cold.
There are occasional tracts of the permafrost (ground that has a temperature below freezing for two or more years) that coats great stretches of northern Siberia.
Complete fire suppression would cause soil temperature to decline gradually, promoting permafrost development that would cause a significant decrease in site productivity.
The process that led to the demise of the lake is known as a permafrost thaw slump.
However, for the grids with a permafrost disappearance time within the near-term under the RCP2.6 scenario, the permafrost disappearance time shows only small changes.
As shown in Fig. 5, for the grids with a permafrost disappearance time later than the near-term (2006 2036) under the RCP2.6 scenario, the permafrost disappearance time advances with increasing RCPs (from 2.6 to 8.5).
