Climate News Network: Researchers in the US have identified a new reason for the acceleration in the melting of Greenlands icecap - the ice underneath, as it melts and then refreezes, appears to speed up glacial flow. The melt-and-freeze-again cycle is not itself new, as a similar process has been diagnosed under the ice cap of Antarctica. Nor is the process itself necessarily connected with global warming. Such things must always have happened. But Robin Bell, a geophysicist at Columbia Universitys Lamont Doherty...