Climate change: 'Ice bumps' reveal history of Antarctic melting

They've traced the changing shapes of bumps on the ice surface that mark locations where glaciers are anchored in place.published in the journal Nature

That's bad news because they are regarded as a key braking mechanism, slowing the movement of ice off the continent. Dr Bertie Miles went back through the entire image archive from the long-running American Landsat spacecraft series to assemble new, cloudless mosaics of Antarctica's coastline. "As we go through the decadal snapshots, you see these bumps in general getting smaller and sometimes completely disappearing," Dr Miles said.

This deeper history gave us a much better grasp of where and when ice loss really got going, said Edinburgh co-worker Prof Rob Bingham.

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