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Black frost (or "killing frost") is not strictly speaking frost at all, because it is the condition seen in crops when the humidity is too low for frost to form, but the temperature falls so low that plant tissues freeze and die, becoming blackened, hence the term "black frost".
In the southern part of Finland, -15 °C (5 °F) is considered the limit of severe frost. The thermometer in the picture shows -17 °C (1.4 °F). The English word "frost" has 2 base meanings that are related to each other but nevertheless sufficiently different: temperature of air below the freezing point of water (ca 273 K)
Frost damage can occur as cracks, stone splinters and swelling of the material. When water freezes, the volume of water increases by 9 %. [ citation needed ] When the volumetric moisture content exceeds 91 %, then the volume increase of water in the pores of the material caused by freezing cannot be absorbed by sufficient empty pores.
Frost heaving (or a frost heave) is an upwards swelling of soil during freezing conditions caused by an increasing presence of ice as it grows towards the surface, upwards from the depth in the soil where freezing temperatures have penetrated into the soil (the freezing front or freezing boundary).
The post If You Have Frost in Your Freezer, This Is What It Means appeared first on Reader's Digest. It can impact food quality, cause a nasty odor, and weaken your freezer’s efficiency. But ...
Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice. The term serves as an umbrella term for a variety of processes, such as frost shattering, frost wedging, and cryofracturing.
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The term appears frequently in Ernest Shackleton's books South and Heart of the Antarctic, Apsley Cherry-Garrard's account of his Antarctic adventures in The Worst Journey in the World (wherein he recorded 109.5 degrees [Fahrenheit] of frost, –77.5 °F or –60.8 °C), in Jack London's "To Build A Fire", as well as Admiral Richard E. Byrd's ...