Central West Antarctica (WAIS Divide). Contours and background color show surface topography and ice thickness. Gray stripes show radar profiles analyzed in this project. The inset shows the location of the main map.

West Antarctic Ice Sheet (WAIS) sits on bedrock much below the current sea level.  It inherently introduces strong interactions between ocean and the ice sheet until the ice sheet shrinks to small ice caps on several high subglacial mountains.  Scientists have revealed very complicated features in current ice flow and in evolution of the ice sheet terminus since the Last Glacial Maximum (about 20,000 years ago).

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