Glaciation- EQ2

Question 1

3 Sources of Accumulation?

Answer 1

Snowfall
Freezing Rain
Deposition

Question 2

5 Sources of Ablation?

Answer 2

Melting
Sublimation
Calving
Evaporation
Avalanches

Question 3

5 Things that impact the Glacial Mass Balance?

Answer 3

Rate of Accumulation
Rate of Ablation
Time of year
Seasonality
Climate Change

Question 4

Cause of glacial movement?

Answer 4

Gravity increasing downslope pressure “shear stress”

Question 5

3 Processes involved in the movement of glaciers?

Answer 5

Basal Slip
Regelation Creep
Internal Deformation

Question 6

6 Factors that control rate of movement?

Answer 6

Altitude
Gradient
Ice Thickness
Bedrock Permeability
Mass Balance
Seasonality

Question 7

Extensional vs Compressional flow

Answer 7

Extensional: High gradient, leads to ice cracking open
Compressional: Flat area, ice slows down and compresses

Question 8

4 Types of crevasse

Answer 8

Bergschrunds
Longitudinal
Marginal
Transverse

Question 9

5 Types of Glacial Erosion

Answer 9

Quarrying
Plucking
Abrasion
Crushing
Basal Melting

Question 10

3 Types of debris entrainment

Answer 10

Supraglacial
Subglacial
Englacial