frozen ground or permafrost

thaw penetration

the downward movement of the thawing front during thawing of frozen ground.
Topic: 
frozen ground or permafrost

thaw consolidation ratio

a dimensionless ratio describing the relationship between the rate of thaw and the rate of consolidation of a thawing soil, which is considered to be a measure of the relative rates of generation and expulsion of excess water during thaw.
Topic: 
frozen ground or permafrost

thaw consolidation

time-dependent compression resulting from thawing of frozen ground and subsequent draining of excess water.
Topic: 
frozen ground or permafrost

thaw bulb

a zone of thawed ground below or surrounding a man-made structure placed on or in permafrost and maintained at temperatures above 0 degrees Celsius.
Topic: 
frozen ground or permafrost

temperature profile

the graphic or analytical expression of the variation in ground temperature with depth.
Topic: 
frozen ground or permafrost

talik

a layer or body of unfrozen ground occurring in a permafrost area due to a local anomaly in thermal, hydrological, hydrogeological, or hydrochemical conditions.
Topic: 
frozen ground or permafrost

syngenetic permafrost

permafrost that formed through a rise of the permafrost table during the deposition of additional sediment or other earth material on the ground surface.
Topic: 
frozen ground or permafrost

syngenetic ice wedge

an ice wedge developed during the formation of syngenetic permafrost.
Topic: 
frozen ground or permafrost

syngenetic ice

ground ice developed during the formation of syngenetic permafrost.
Topic: 
frozen ground or permafrost

surface freezing index

the cumulative number of degree-days below 0 degrees Celsius for the surface temperature (of the ground, pavement, etc.) during a given time period.
Topic: 
frozen ground or permafrost

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