| Term: | Seasonally-active permafrost |
| Definition: |
The uppermost layer of the permafrost which undergoes seasonal phase changes due to the lowered thawing temperature and freezing-point depression of its pore water. NSIDCCryosphere
The uppermost layer of the permafrost which undergoes seasonal phase changes due to the lowered thawing temperature and freezing-point depression of its pore water IPAPermafrost GCW |