Refreezing of thawed materials. This term is used to describe: 1) seasonal refreezing of the thawed Active Layer or 2) refreezing of soil thawed as a result of construction activity or drilling of a w
ell in Permafrost, and of soil placed as backfill or a slurry around foundations or engineering facilities buried or embedded in Frozen Ground.
Statistical curve relating probability of first and last freeze (0C) occurrence in the fall and spring to specific dates; a tool to assess freeze risk. May be applied to other critical threshold tempe
ratures such as -1C, -2C, -4C, etc.
Freezing of a material followed by thawing. Natural Freeze-Thaw Cycles consist of the freezing and subsequent thawing during a freezing season and the following thawing season.
Pattern of alternating temperatures from above to below freezing causing freezing and thawing of upper soil layer, often resulting in damage to plant root systems, particularly small winter grains, mo
st commonly observed with soils near saturation in surface layers.
The change in state of matter from liquid to solid that occurs with cooling. Usually used in meteorology when discussing the formation of ice from liquid water.
1.The phase transition of a substance passing from the liquid to the solid state; solidification; the opposite of fusion. In meteorology, this almost invariably applies to the freezing of water. The p
hase change from the gaseous to the solid state is deposition. Like condensation, the freezing of water involves the process of nucleation. See ice point, freezing point, true freezing point, melting point. 2.Said of an environment when its temperature is equal to or less than 0C (32F).
A measure of how cold it has been and how long it has been cold; the cumulative fdd is usually calculated as a sum of average daily degrees below freezing for a specified time period (10 days, month,
season, etc.).