@prefix qx8: <http://data.loterre.fr/ark:/67375/QX8> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix chc: <http://data.loterre.fr/ark:/67375/CHC> .

qx8: a skos:ConceptScheme .
qx8:-G1VD5Q06-H
  skos:definition "La survie d'un glacier dépend de son bilan de masse ou bilan de masse de surface (SMB), c'est-à-dire de la différence entre accumulation et ablation (sublimation et fonte). Le changement climatique peut entraîner des variations à la fois de la température et de l'importance des chutes de neige, provoquant des modifications du bilan massique de surface. Les changements dans le bilan de masse contrôlent le comportement à long terme d'un glacier et sont les indicateurs climatiques les plus sensibles le concernant. Un glacier dont le bilan est durablement négatif est en déséquilibre et recule, au contraire d'un glacier dont le bilan est durablement positif, qui lui aussi est en déséquilibre mais avance. Le recul d'un glacier se traduit par une perte de la zone de basse altitude du glacier en question. (Adapté et traduit de : <a href=\"https://en.wikipedia.org/wiki/Glacier_mass_balance\">https://en.wikipedia.org/wiki/Glacier_mass_balance</a>)"@fr, "The mass balance, or mass budget, of a glacier or ice sheet is defined as the difference between (1) mass input (by net snow/ice accumulation at the surface caused by precipitation, drifting snow, and solid deposition from water vapor, or by subsurface accumulation caused by superimposed ice, where the base of the ice goes from wet to frozen, or by basal accretion in the case of ice shelves) and (2) mass loss (by basal melting, surface sublimation and melting, and ice calving). Crucial to the survival of a glacier is its mass balance or surface mass balance (SMB), the difference between accumulation and ablation (sublimation and melting). Climate change may cause variations in both temperature and snowfall, causing changes in the surface mass balance. Changes in mass balance control a glacier's long-term behavior and are the most sensitive climate indicators on a glacier. A glacier with a sustained negative balance is out of equilibrium and will retreat, while one with a sustained positive balance is out of equilibrium and will advance. Glacier retreat results in the loss of the low elevation region of the glacier. (Adapted from: <a href=\"https://en.wikipedia.org/wiki/Glacier_mass_balance\">https://en.wikipedia.org/wiki/Glacier_mass_balance</a> and P. A. Mayewski et al. (2009), Reviews of Geophysics, 47, RG1003, Paper number 2007RG000231.)"@en ;
  a skos:Concept ;
  skos:inScheme qx8: ;
  skos:broader qx8:-VG7N5DR1-T ;
  skos:prefLabel "bilan de masse glaciaire"@fr, "glacier mass balance"@en ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Glacier_mass_balance>, chc:-VTDSK0LF-F .

qx8:-VG7N5DR1-T
  skos:prefLabel "mass balance"@en, "bilan de masse"@fr ;
  a skos:Concept ;
  skos:narrower qx8:-G1VD5Q06-H .