María Gemma Llorens
Juan de la Cierva researcher in the Department of Geology at the Autonomous University of Barcelona
This is a very worrying rise in temperature. The ice mass over Antarctica is more than 3 kilometres deep. The temperature profile typically varies from -50°C at the surface to almost 0°C at depth, where the ice is in contact with the bedrock of the continent. It is the heat of the earth that causes the temperature of the ice to reach near melting point at the base.
A rise in surface temperature as severe as the one being recorded in Antarctica's Dome C, which is 40ºC higher than usual on a continuous basis, would also imply a brutal increase in the temperature of the ice at the base, exceeding 0ºC and producing a massive melting of the ice. All this molten water at the base would cause the polar ice cap to slide towards the ocean, producing a great acceleration and a massive arrival of the ice.