Unlike most other Korean mountain environments, Hallsan has a unique vertical distribution of plants in three different zones: the subtropic, temperate, and frigid zones.

Originally developed for hunters in the frigid zones of the US and Canada, eventually most military organizations copied them.

We had left over our heads the murky sky and cold fogs of the frigid zone to revel under the azure sky of Italy!

We seemed to have made a sudden leap from the torrid to the frigid zone.

It is my intention to move one of the tropics up there and transfer the frigid zone to the equator.

They were up there now, ninety-seven bodies, around a thousand pounds each, neatly laid out in the frigid zone.

In many species that live in seasonally frigid zones the winter down hair is shed in clumps during springtime.

Earth's polar regions are the areas of the globe surrounding the poles also known as frigid zones.

"So you see, when tilt reaches pi-over-four radians- half a right angle-tropics and frigid zones meet; the temperate zone disappears."

For a group of patients in the public hospital here it was a frigid, barren zone where they said they were terrorized by American airstrikes.