Here is an amazing animation revealing a complete picture of ice flow across Antarctica:

 

Follow this link for a BBC article on this map which is built from a composite of billions of radar data points collected between 1996 and 2009 by three different satellites (Europe’s Envisat, Japan’s Alos, and Canada’s Radarsat-2).

The research work which produced this fascinating insight into ice flow across the whole ice sheet has been published in the journal Science.

“We present a reference, comprehensive, high-resolution, digital mosaic of ice motion in Antarctica assembled from multiple satellite interferometric synthetic-aperture radar data acquired during the International Polar Year 2007-2009. The data reveal widespread, patterned, enhanced flow with tributary glaciers reaching hundreds to thousands of kilometers inland, over the entire continent. This view of ice-sheet motion emphasizes the importance of basal-slip–dominated tributary flow over deformation-dominated ice-sheet flow, redefines our understanding of ice-sheet dynamics, and has far-reaching implications for the reconstruction and prediction of ice-sheet evolution.”
Rignot, Mouginot, and Scheuchi. Ice Flow of the Antarctic Ice Sheet, Science, 2011.

doi: 10.1126/science.1208336 [subscription required for full article access]

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