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Definitions (37)
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ablation
All processes by which snow and ice are lost from a glacier, floating ice, or snow cover; or the amount which is melted. These processes include melting, evaporation, (sublimation), wind erosion, and [..]
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accumulation
All processes that add snow or ice to a glacier or to floating ice or snow cover: snow fall, avalanching, wind transport, refreezing...
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alpine glacier
Any glacier in a mountain range which is dominantly confined by the surrounding topography. It usually originates in a cirque and may flow down into a valley previously carved by a stream. Synonym: mo [..]
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calving
Breaking off and floating away as icebergs of either a tidewater glacier or an ice shelf. Calving is a very efficient form of ablation, thus helps stabilize the extent of ice sheets (like Antarctica) [..]
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chattermark
A small, curved scar made by vibratory chipping of a bedrock surface by rock fragments carried in the base of a glacier. Each mark is roughly transverse to the direction of flow, and either convex (&q [..]
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continentality
The distance between a site and open ocean water. Continental interiors (obviously!) and areas surrounded by nearly permanent, continuous sea ice are highly continental.
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drift
An archaic term for heterogeneous sediment (presumed to be deposited by drifting icebergs, perhaps in Noah's flood!). Includes and retained in stratified drift, but not in till.
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energy
Ability to do work. Most evident in glacial systems as radiant energy from the sun and as latent energy required to melt ice to water.
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feedback loop
Reinforcement which either accelerates (positive feedback) or retards (negative feedback) a process. An example of positive feedback would be the accumulation of glacial snow and ice increasing the a [..]
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