There's Something Hot Hidden Under East Antarctica
There's something hot hidden under East Antarctica, and scientists aren't sure precisely what it is — though they have a pretty good guess.
East Antarctica is a craton, a big continent-size chunk of Earth's crust. It's solid, and thick. It's not supposed to let heat through from inside the Earth. ...
That craton means that East Antarctica shouldn't have much melted water at the bottom of its ice sheet. And yet, ... there is an unusually high amount of melted water down there. This melt isn't related to climate change, which causes intense melting at the fringes of the continent; it's an old, and separate, warm spot in the ice, insulated and kept far away from the atmosphere. Scientists were able to detect it thanks to a survey using specialized, ice-penetrating radar. ...
It's not entirely clear what causes the warmth down there. The craton should protect the ice from the Earth's inner heat. But the research team offered an educated guess: hydrothermal energy. A fault in the crust down there might be full of water, pulsing up and down between the warm depths of the Earth and the bottom of the ice. It provides a conduit for heat to escape and triggers melting. ...
