"Ice streams" refer to fast-flowing rivers of ice within a larger ice sheet or glacier. These streams move much quicker than the surrounding ice and are similar to rivers of water, but made up of frozen ice instead. Full definition
Model experiments on the evolution and stability of ice streams. (waisworkshop.org)
However, scientists have several ingenious ways in which they can observe changes to this fragile, important ice stream. (antarcticglaciers.org)
Recent observations (summarized by Alley et al. (2005); see references therein) of acceleration of glaciers behind the collapsed Larsen B ice shelf, of ice streams in the Amunden Sea sector of West Antarctica, and of many Greenland outlet glaciers suggest that the time - scales for ice - dynamical changes may be much shorter. (judithcurry.com)