Permafrost is the third solo album from German ambient music producer, Thomas Köner.

A serac is a group or column of ice intersecting crevasses on a glacier.

Firn is a type of snow that has been left over from past seasons and has been recrystallized into a substance denser than névé.

Permafrost is soil at or below the freezing point of water (0 °C or 32 °F) for two or more years.

In practice it is a large stretch of land (found mostly in Siberia) with soil frozen all over deep to the bottom.