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# Long description

This figure is a radar profile. It shows wavy white lines on a black background. The white lines represent layers of ice underneath the surface. The lines are roughly parallel and run horizontal in the left hand side of the image. Here, there are many tightly packed white lines at the top of the image, which is labelled ice surface. A third down the image the lines are less frequent, labelled internal layers, and at the bottom they are not well defined but are labelled base of polar ice and basal unit. To the right hand side of the image the lines are uneven, broken and slope downwards, representing the edge of the icecap. They still follow the same pattern as the left hand side of the image.