paos.colorado.edu

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Definitions (37)

1

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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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frost action- the mechanical weathering process caused by repeated freezing and thawing of water in pores


The general term for all glacial deposits, both unsorted and sorted (see Stratified Drift).
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