Thaw depth Thaw depth In soil science, the thaw depth or thaw line is the instantaneous level down to which the soil has warmed to zero degrees celcius. The active layer thickness is the maximum thaw depth over a period of two years. The layer of soil over the thaw depth is called the active layer, while the soil below is called permafrost. The term frost front refers to the varying position of the thaw line during the periods of freezing/thawing. The knowledge of the thaw depth is important for the two major reasons: its influence on the ecology and on construction
Life Below Zero Life Below Zero Life Below Zero is a documentary television series which illustrates the daily and seasonal activities of subsistence hunters as they make their living in remote areas of Alaska. Produced by BBC Worldwide, the show airs on the National Geographic Channel. The show follows people who live in the remote areas of Alaska, trying to survive in the below-zero conditions, demonstrating their everyday struggles as they hunt and depend only on themselves and survive using the resources they have. The show premiered on Sunday night. It switched to Tuesday night beginning in Season 4. It currently shows on