- Eternally frozen ground
- Ever frozen ground
- Perennially frozen ground
- Permanently frozen ground
- Perpetually frozen ground
Exact Matching Concepts from Other Schemes
Closely Matching Concepts from Other Schemes
- found: Work cat.: Davis, N. Permafrost, 2001: p. 2 (a widely accepted definition of permafrost is that it is ground that has a temperature lower than 0 degrees C. (32 degrees F.) continuously, for at least two consecutive years) p. 3 (the word permafrost (permanent+frozen) also is a catch-all term used to describe the general area of science relating to all aspects of frozen ground, past, present, and future)
- found: OED, 1989 (permafrost: subsoil or other underground material that is at a temperature of less than 0 degrees C. throughout the year, as in Arctic regions; permanently frozen ground)
- found: Glossary of geology, 1987 (permafrost: the thickness of permafrost ranges from over 1000 m. in the north to 30 cm. in the south; it underlies about one-fifth of the world's land area; etymology: permanent+frost; see also: tjale; Cf.: pereletok. Term introduced by Muller (1947) who included as synonyms the terms "frozen ground" or "frozen soil" preceded by any of the following modifiers: "constantly," "eternally," "ever," "perennially," "permanently," "perpetually," and "stable;" Syn.: pergelisol; perennially frozen ground)
- found: LC database, Jan. 15, 2005 (permafrost terrain; permanently frozen terrain; permanently frozen ground; permafrost)
- 2005-03-01: new
- 2005-04-15: revised
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