Nature: Antarctica Is Melting From Below

[kristopher]

7. I'm afraid this has nothing to do with a volcano.

The researcher being quoted was referring to the strength of the upwelling current and the force of this newly identified (in 2009), localized convection effect.

One day, near the southern edge of Pine Island Glacier Ice Shelf, the researchers directly observed the strength of the melting process as they watched frigid, seawater appear to boil on the surface like a kettle on the stove. To Jacobs, it suggested that deep water, buoyed by added fresh glacial melt, was rising to the surface in a process called upwelling. Jacobs had never witnessed upwelling first hand, but colleagues had described something similar in the fjords of Greenland, where summer runoff and melting glacier fronts can also drive buoyant plumes to the sea surface.

http://phys.org/news/2011-06-ocean-currents-antarctic-ice.html