Glacial Systems and Budgets (AQA A-Level Geography): Flashcards
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Practise the cards
10 cards from this deck
Accumulation (glacial term)
Accumulation (glacial term)
All inputs adding mass to glacier system
Ablation (glacial term)
Ablation (glacial term)
All outputs removing mass from glacier system
Snow line
Snow line
Lower edge where snow remains permanently year-round
Firn
Firn
Compact snow after ~2 seasons of accumulation
Zone of accumulation
Zone of accumulation
Upper glacier where inputs exceed outputs
Zone of ablation
Zone of ablation
Lower glacier where outputs exceed inputs
Equilibrium line
Equilibrium line
Boundary where net gain & net loss are balanced
Net balance (glacial)
Net balance (glacial)
Difference between total accumulation & ablation per year
Glacial advance occurs when
Glacial advance occurs when
Accumulation exceeds ablation
Glacial retreat occurs when
Glacial retreat occurs when
Ablation exceeds accumulation