The discovery raises fresh questions about the speed at which sea levels might rise in a warmer world due to the rate at which
parts of the ice sheets slide from the land into the ocean, scientists said at the American Association for the Advancement of Science in San Francisco.
When
parts of the
ice melt, liquid water trickles to the base and this can lubricate the underside
of the
ice sheet, allowing it to
slide more quickly into the sea and drive up sea levels at a faster rate.