Polygons can form either in permafrost areas or in areas that are affected by seasonal frost.

The vault will have cooling systems, but its location in a permafrost area means operating costs will be extremely low.

No superflood effect has been noted within the recent permafrost area.

In periglacial environments, this mechanism is highly significant and it is the predominant process in ice lens formation in permafrost areas.

This area is interspersed with peatlands, bogs, fens, permafrost areas, and areas of arctic tundra.

He hopes to return to another permafrost area next summer, although he now lacks funds.

The construction itself took place in scarcely populated permafrost areas under harsh climatic conditions.

Lithalsa is a frost-induced raised land form in permafrost areas with mineral-rich soils, where a perennial ice lens has developed within the soil.

In permafrost areas corduroy road construction techniques were used.

One of the most widespread examples is the dominance of Black Spruce in extensive permafrost areas, since this species can tolerate rooting pattern constrained to the near surface.