ABLATION in Glaciology (from the Late Latin word ablatio, meaning removal, taking away; EN: ablation; DE: Ablation, Eisschwund; FR: ablation; ES: denudacion, ablacion; RU: абляция), the melting of the glaciers, the firn snow, or the snowfield.

The factors, which are determining the ablation: the internal heat of the Earth, the hot springs, the friction of the glacier on its bed, and the others (the so-called subglacial ablation); the friction between the components of the glacier, the circulation of the air and water (the intra-glacial ablation), the climatic peculiarities (the surface ablation); the wind drift, the water erosion, the separation of the icebergs (the mechanical ablation).