Spatially variable till deformation and water transport in ice-stream shear margins from numerical simulations Academic Article uri icon


  • Abstract The ice-flow morphology of Antarctica is characterized by rapid ice motion in narrowly confined routes, called ice streams, bordered by nearly stagnant ice. The abrupt change in velocity at the boundary of ice streams leads to a zone of intense deformation, known as the shear margin. Shear margins remain enigmatic features. They have a profound impact on the ice flux to the ocean, but do not affect rapid ice flow in a straightforward way. From geophysical investigations and scattered core sampling it is …

publication date

  • February 1, 2016