Cryosphere- Ice on Earth, Dynamic Ice Flashcards
What part of the cryosphere is the quickest to respond to environmental change
Snow cover
Are ice sheets on land or over sea
On land or sea
How large does an ice mass have to be to be considered an ice sheet
50,000km2
Are ice caps over sea or land
Land (terrestrial)
Where do ice streams transport ice to
From accumulation zone to ablation zone/ocean
Where is the grounding line
Is the point where the ice starts to float, once it goes past this is when it starts to add to sea level
Where are ice shelves found
In the sea
When terrestrial ice sheets melt do they add to sea level
Yes, eustatic SLR
Geothermal heat flux is …
Convection currents in the mantle
What are the main 2 components of ice flow
Internal deformation and basal sliding
Explain the velocity/depth profile
Velocity increases with depth. Basal velocity in this case is zero, high basal drag
Explain the velocity/width profile
Velocity decreases at margins. Velocity at margin is low, high lateral drag
