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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The change in snow grains as the snowpack becomes wet(snow temperature reaches 0 degrees C) and subsequently refreezes is known as melt-freeze metamorphism. This process usually occurs during late winter and spring when air temperatures are high, solar radiation is high, and cycles of melting and refreezing are common. Melt-freeze crust layers that exist in the freeze part of the cycle can be very strong.  5, record 1, English, - melt%2Dfreeze%20metamorphism

Record number: 1, Textual support number: 2 CONT

Melt-Freeze Metamorphism. When snow is warmed to 0°C(32°F) by rain, solar radiation or warm air, rounded grains develop which are joined into clusters by liquid water... In the spring, when melt-freeze cycles are repeated daily, the resulting spring snow has a coarse-grained appearance.  6, record 1, English, - melt%2Dfreeze%20metamorphism

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

La métamorphose de fonte [...] se traduit par l'apparition d'eau liquide au sein du manteau neigeux. Elle est provoquée par une chute de pluie ou un redoux prolongé. Il se forme des agglomérats dits grains ronds («gros sel») qui rendent le manteau neigeux très instable.  3, record 1, French, - m%C3%A9tamorphose%20de%20neige%20humide

Record number: 1, Textual support number: 2 CONT

Métamorphose concernant la neige humide (TEL>0%). [Cette métamorphose] aboutit à la formation de grains ronds.  4, record 1, French, - m%C3%A9tamorphose%20de%20neige%20humide

Record number: 1, Textual support number: 1 OBS

neige humide: Neige contenant de l'eau sous forme liquide (TEL>0%). Sa température est toujours de 0 °C.  4, record 1, French, - m%C3%A9tamorphose%20de%20neige%20humide

Record number: 1, Textual support number: 2 OBS

TEL = teneur en eau liquide.  5, record 1, French, - m%C3%A9tamorphose%20de%20neige%20humide

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The change in the structure and texture of snow grains which result from variations in temperature, migration of liquid water and water vapor, and pressure within the snow cover.  2, record 2, English, - snow%20metamorphism

Record number: 2, Textual support number: 1 CONT

Metamorphism is a term borrowed from the geological sciences. In snow hydrology it refers to changes in snow texture caused by pressure and temperature conditions. The temperature of the layer determines the rate of metamorphism, and the temperature gradient across the layer largely determines the type of metamorphism.... In a dry, seasonal snowpack, it is convenient to distinguish two types of metamorphism... temperature-gradient metamorphism [and] equitemperature metamorphism. A third type of metamorphism takes place when snowpack temperatures reach 0°C and surface snow layers undergo frequent melt-freeze cycles. [It is] a process called... melt-freeze metamorphism.  3, record 2, English, - snow%20metamorphism

Record number: 2, Textual support number: 1 OBS

There are two types of snow metamorphism : dry snow metamorphism(e. g. rounding and faceting) and wet snow metamorphism(or melt-freeze metamorphism).  4, record 2, English, - snow%20metamorphism

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

[...] nous distinguerons deux types de métamorphoses : les métamorphoses de la neige sèche et les métamorphoses de la neige humide.  1, record 2, French, - m%C3%A9tamorphose

Record number: 2, Textual support number: 1 OBS

Les métamorphoses de la neige sèche. La neige sèche est la neige qui ne contient pas d'eau sous forme liquide. Elle englobe [la métamorphose] - par faible gradient, [les particules reconnaissables] vont se transformer en grains fins; - par moyen gradient, [les particules reconnaissables] vont se transformer en grains à faces planes; - par fort gradient, [les particules reconnaissables] se transformeront en grains à faces planes (passage intermédiaire obligé) puis en gobelets.  2, record 2, French, - m%C3%A9tamorphose

Record number: 2, Textual support number: 2 OBS

La métamorphose de la neige humide. Le facteur qui intervient dans ce cas est unique : l'eau sous forme liquide. Le résultat de ce type de métamorphose aussi : le grain rond. [...] Le grain rond est donc le dernier stade d'évolution de la neige, avant sa disparition par fonte.  2, record 2, French, - m%C3%A9tamorphose

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Conditions of melt followed by conditions of freezing, either within the snowpack or the atmosphere.  2, record 3, English, - melt%2Dfreeze%20cycle

Record number: 3, Textual support number: 1 CONT

When the sun is sufficiently strong to melt the top layers of the snowpack during the day and when nighttime temperatures fall below 0°C, cycles of freezing and thawing will occur. In this process, called melt-freeze metamorphism, smaller grains will melt before large ones and so, during the course of a number of melt-freeze cycles, larger grains will grow at the expense of smaller ones.  3, record 3, English, - melt%2Dfreeze%20cycle

Record number: 3, Textual support number: 2 CONT

The mountains are under the influence of a melt-freeze cycle. [Example approved by the Avalanche Bulletin Terminology Standardization Committee.]  4, record 3, English, - melt%2Dfreeze%20cycle

Record number: 3, Textual support number: 1 OBS

melt-freeze cycle: term officially approved by the Avalanche Bulletin Terminology Standardization Committee.  5, record 3, English, - melt%2Dfreeze%20cycle

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Les montagnes subissent l'influence d'un cycle de dégel-regel. [Exemple entériné par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.]  2, record 3, French, - cycle%20d%C3%A9gel%2Dregel

Record number: 3, Textual support number: 1 OBS

cycle dégel-regel; cycle fonte-regel : termes uniformisés par le Comité d'uniformisation de la terminologie des bulletins d'avalanche.  3, record 3, French, - cycle%20d%C3%A9gel%2Dregel

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 OBS

Melt-freeze metamorphism : The change in snow grains as the snowpack becomes wet(snow temperature reaches 0 degrees C) and subsequently refreezes is known as melt-freeze metamorphism. This process usually occurs during late winter and spring when air temperatures are high, solar radiation is high, and cycles of melting and refreezing are common. Melt-freeze crust layers that exist in the freeze part of the cycle can be very strong.  2, record 4, English, - melt%2Dfreeze%20cohesion

Record number: 4, Textual support number: 2 OBS

Melt-freeze crust: A layer of snow that has been warmed until liquid water forms between the grains and then freezes to form a relatively strong layer.  3, record 4, English, - melt%2Dfreeze%20cohesion

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Cohésion due au gel de l'eau liquide au sein du manteau neigeux.  1, record 4, French, - coh%C3%A9sion%20de%20regel

Record number: 4, Textual support number: 1 CONT

Lorsque ces neiges humides subissent un refroidissement, l'eau liquide présente gèle progressivement, créant de solides liaisons de glace entre les grains ronds avec formation d'agglomérats de plusieurs mm et parfois de croûtes de glace. La neige acquiert alors une excellente cohésion dite de regel. C'est ce que l'on peut observer fréquemment au printemps avec l'alternance des réchauffements diurnes et des refroidissements nocturnes.  1, record 4, French, - coh%C3%A9sion%20de%20regel

Record 4,  Textual support,  Spanish