Ice Streams

Bed-Surface Relation

  • Transfer-functions
    Transfer-functions are used to relate the condition at the bed to the surface.  For more information look at WAIS'99 pages below.

Flow Law

  • Comparison of temperature, stress dependence and anisotropy effects
    Temperature change from 0 to -25 C causes a change of viscosity by a factor of 72. Anisotropy causes a factor of 9 change in viscosity (max ??). For n=3 in stress dependence a change of stress from 0.1 bar to 1 bar causes a change in apparent viscosity by a factor of 100.

Papers

Presentations

 

Ísstraumar

Bed-Surface Relation

Relating conditions at the bottom of ice streams to surface topography.
The surface of ice streams is effected by the conditions at the bed, be it topography (a bump) or changes in slip resistance. This link leads to an Animation of a generation of a flow stripe due to a bedrock bump.

Transfer-functions
Transfer-functions are used to relate the condition at the bed to the surface.  For more information look at WAIS'99 pages below.

Flow Law

Comparison of temperature, stress dependence and anisotropy effects
Temperature change from 0 to -25 C causes a change of viscosity by a factor of 72. Anisotropy causes a factor of 9 change in viscosity (max ??). For n=3 in stress dependence a change of stress from 0.1 bar to 1 bar causes a change in apparent viscosity by a factor of 100.