TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

A snow grain with flat faces separated by sharp corners.  7, record 1, English, - facet

Record number: 1, Textual support number: 1 CONT

Solid faceted crystals are those in which the original crystal form is often no longer discernible and the crystals begin to take on an angular, faceted or striated appearance with straight edges and angular corners beginning to predominate. Faceted grains typically tend to be larger grains and are often significantly larger than the grain from which they formed ... Commonly referred to as "facets" or "sugar snow" these grains tend to be found in softer or weaker snowpack layers. Faceted grains typically form when there is a strong temperature gradient in the snowpack (>1 degree/10 cm). This strong temperature gradient occurs most often in areas where the snowpack is shallow and temperatures are cold.  8, record 1, English, - facet

Record number: 1, Textual support number: 2 CONT

There is a weak layer of facets buried deep in the snowpack. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]  2, record 1, English, - facet

Record number: 1, Textual support number: 1 OBS

When faceted crystals develop deep in the snowpack, they are usually referred to as "depth hoar" crystals. Because these angular, faceted crystals have relatively no internal cohesion or bonding, they behave much like sugar crystals and are frequently referred to as "sugar snow."  9, record 1, English, - facet

Record number: 1, Textual support number: 2 OBS

facet; facetted grain; facetted crystal: terms officially approved by the Avalanche Bulletin Terminology Standardization Committee.  7, record 1, English, - facet

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Cristal de neige constitué d'une multitude de facettes qui résultent d'une métamorphose de gradient.  3, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 1 CONT

[...] l'effet de courbure permet au début de la métamorphose [de moyen gradient] de provoquer la sublimation des petits grains, induisant une augmentation moyenne des tailles de grains. Le résultat global est donc l'apparition d'un type de grains anguleux comportant des facettes faisant des angles à 120° [...]. Ces grains sont appelés grains à faces planes.  4, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 2 CONT

Les métamorphoses de la neige sèche. [...] Le devenir des particules reconnaissables va dépendre de la valeur du gradient de température de la couche concernée : - par faible gradient, elles vont se transformer en grains fins; - par moyen gradient, elles vont se transformer en grains à faces planes; - par fort gradient, elles se transformeront en grains à faces planes (passage intermédiaire obligé) puis en gobelets. Ces transformations sont irréversibles : il n'y a pas de retour en arrière possible.  5, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 3 CONT

Une couche fragile de grains à faces planes est enfouie profondément dans le manteau neigeux. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]  2, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 1 OBS

métamorphose de moyen gradient: métamorphose de neige sèche commandée par un gradient moyen (0,1<G<0,2 °C/cm), où le givrage concurrence l'effet de rayon de courbure.  4, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 2 OBS

Éviter l'emploi du terme «grain à facettes», mais privilégier les termes «grain à faces planes» et «face plane». [Éviter aussi l'emploi de «grain de neige à facettes».]  2, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 3 OBS

Le terme «facette» est un calque de l'anglais.  2, record 1, French, - grain%20%C3%A0%20faces%20planes

Record number: 1, Textual support number: 4 OBS

grain à faces planes; face plane : termes uniformisés par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.  6, record 1, French, - grain%20%C3%A0%20faces%20planes

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Ice crystals formed by sublimation within snow, but beneath the snow surface.  5, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 1 CONT

Depth hoar [are] large coarse recrystallized grains of snow that are the end result of the faceting or squaring process within the snowpack, a process driven by temperature gradients. Such crystals are often weak and develop as a result of (locally) strong temperature gradients and resulting vapor pressure differences in the snowpack, especially in shallow snowpacks with cold air temperatures. These grains are formed through re-crystallization of existing snow grains as water vapor is transferred (sublimation and deposition) from warmer regions of higher vapor pressure (near the ground) to colder regions with lower vapor pressure (upper layers closer to the snow surface).  6, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 2 CONT

According to the Colorado Avalanche Information Center (CAIC), shallow snow that sits on the ground under clear skies and cold temperatures creates depth hoar, also known as sugar snow or squares.  7, record 2, English, - depth%20hoar

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Depth hoar can be found near the base of the snowpack. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]  8, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 1 OBS

Depth hoar is often the weakest layer in the snowpack and is a potential sliding layer for avalanches.  9, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 2 OBS

Depth Hoar is also called : Temperature Gradient (TG) (but this is an outdated term), sugar snow, squares, sometimes incorrectly called "hoar frost" by old, rural geezers.  4, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 3 OBS

Cup-shaped crystals are a common form of depth hoar.  10, record 2, English, - depth%20hoar

Record number: 2, Textual support number: 4 OBS

depth hoar: term officially approved by the Avalanche Bulletin Terminology Standardization Committee.  11, record 2, English, - depth%20hoar

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Cristaux de glace formés par condensation solide au sein de la neige, mais sous la surface de la couche neigeuse.  6, record 2, French, - givre%20de%20profondeur

Record number: 2, Textual support number: 1 CONT

La conséquence en est un important changement de forme des cristaux. Ceux-ci deviennent anguleux avec l'apparition de petites facettes, un peu comme sur un diamant. On les appelle grains à face plane [...] Si la transformation dure assez longtemps et si le gradient de température est assez fort, ces cristaux vont grossir et prendre l'aspect de pyramides creuses, les faces striées un peu comme des gradins : leur taille peut devenir remarquable (5 à 6 mm de diamètre). On les appelle gobelets ou aussi givre de profondeur [...]  7, record 2, French, - givre%20de%20profondeur

Record number: 2, Textual support number: 2 CONT

Le givre de profondeur se trouve près de la base du manteau neigeux. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]  8, record 2, French, - givre%20de%20profondeur

Record number: 2, Textual support number: 1 OBS

givre de profondeur : Les Suisses Romands l'appellent aussi la neige coulante, à cause de sa grande instabilité.  9, record 2, French, - givre%20de%20profondeur

Record number: 2, Textual support number: 2 OBS

givre de profondeur : terme uniformisé par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.  9, record 2, French, - givre%20de%20profondeur

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Cristales de hielo formados por sublimación en el interior de la nieve pero debajo de la superficie nevosa.  1, record 2, Spanish, - nieve%20en%20forma%20de%20az%C3%BAcar