All About Ablations
all processes that remove mass from a glacier
What type of calculator are you allowed to use?
Class 2 (non graphing/programmable)
what is accumulation
where glaciers gain more mass than they lose
Flow that occurs when glacier motion is decelerating down-slope.
what are Chattermarks
Striations or marks left on the surface of exposed bedrock caused by the advance and retreat of glacier ice.
what are 2 examples of ways ablation occurs in glaciers?
sublimation, evaporation
What resources are you allowed to bring as a reference
A standard 3-ring binder
what season does accumulation normally happen?
winter season
what is an alpine glacier?
A glacier that is confined by surrounding mountain terrain; also called a mountain glacier
what is Basal Sliding
The sliding of a glacier over bedrock
what season(s) do ablations normally happen in?
summer, spring
how many people compete in this competition per team (A,B,C)
a partner (2 people)
what is an accumulation zone
Area of a glacier where more mass is gained than lost
what are Band Ogives
Alternate bands of light and dark on a glacier; usually found below steep narrow icefalls and thought to be the result of different flow ablation rates between summer and winter
Branched Valley Glacier
Glacier that has one or more tributaries that flow into it; distinguished from a simple valley glacier that has only a single tributary glacier
What role does ablation play in the movement of glaciers?
If accumulation exceeds ablation, the glacier advances, and if ablation exceeds accumulation, the glacier retreats.
how much time does dynamic planet take
50 min
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what is an Arete
Sharp narrow ridge formed as a result of glacial erosion from both sides
what is Dead Ice
Any part of a glacier that has ceased to flow; dead ice is usually covered with moraine
What type of energy is involved with ablation?
turbulent fluxes of sensible and latent heat.
is dynamic planet test or lab based?
test
snow accumulates above which line of a glacier?
the firn line (the zone that separates bare ice from snow at the end of the ablation season.)
what is a glacial advance?
occurs when a glacier flows down a valley faster than the rate of ablation at it's terminus
what is bergschrund
Crevasse that separates flowing ice from stagnant ice at the head of a glacier