Permafrost

Reduction of permafrost in Canada and Alaska. Infrastructure built on the permafrost foundation at risk.

For more information about the source of the headline on permafrost, see:

• Lawrence, D. M., and A. G. Slater (2005), A projection of severe near-surface permafrost degradation during the 21st century, Geophys. Res. Lett., 32, L24401, doi:10.1029/2005GL025080. View research (registration required)