Temperate Glacier
Warm Based
Close to 0’ throughout
Polar Glacier
Cold Based
Below freezing throughout
Polythermal Glacier
Warm based in thick/central regions
Cold based at surface + bed
Factors influencing movement
Gravity
Temperature/thermal regime
Thickness
Bedrock (Deformable, permeable)
PMP
Pressure Melting Point
Temperature at which ice melts at a given pressure
Cold Based Movement
Internal deformation
Warm based movement
Basal Slip
Internal Deformation