needle ice
Link: http://w3id.org/permafrost/v/ipaglossary/t0213
Within: IPA Permafrost Glossary
Definition: Thin, elongated ice crystals that form perpendicular to the ground surface (see Figure 10g).
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needle ice
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Needle ice forms during nights when there is extensive radiative cooling, causing ice segregation in the surface layer of the soil. The needles can form under stones, soil peds, moss or other surface vegetation and are best developed in alpine areas with maritime temperate climates where silty or organic soils are present. They can also form on coarse-grained, porous volcanic ejectamenta (e.g., in British Columbia and Iceland). The Swedish term "pipkrake" is sometimes used to describe needle ice.
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| dcterms:source |
https://doi.org/10.4224/20386561
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