permafrost
It is known as the permafrost.
permafrost
it is called permafrost
Tundra
permafrost
Tundra
The permanently frozen layer of earth is called 'permafrost'. Please ensure you use a current referent when describing permafrost extent, since permafrost borders are rapidly changing in both directions.
That's called the 'permafrost'.
The best I can tell it's called permafrost
Permafrost.
permafrost