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
Centigrade 232 Centigrade 232 Centigrade 232 is an album and a book of poems by English writer and musician Robert Calvert, recorded in 1986 and released in 2007. The poem Centigrade 232 was set to music by Spirits Burning in 2001. Some titles were set to music by Hawkwind and issued as "The Brock/Calvert Project" in 2007. Calvert had regarded himself first and foremost as a poet and writer and his original involvement with the English rock group Hawkwind from 1971 was as a lyricist and narrator of "space-age poetry" at gigs. It was later as a solo performer and his second