Geothermal Heat Contributing To West Antarctic Ice Sheet Melting

bricko sends this news from The University of Texas at Austin: Thwaites Glacier, the large, rapidly changing outlet of the West Antarctic Ice Sheet, is not only being eroded by the ocean, it's being melted from below by geothermal heat, researchers at the Institute for Geophysics at The University of Texas at Austin (UTIG) report in the current edition of the Proceedings of the National Academy of Sciences. The findings significantly change the understanding of conditions beneath the West Antarctic Ice Sheet, where accurate information has previously been unobtainable. The Thwaites Glacier has been the focus of considerable attention in recent weeks as other groups of researchers found the glacier is on the way to collapse, but more data and computer modeling are needed to determine when the collapse will begin in earnest and at what rate the sea level will increase as it proceeds. The new observations by UTIG will greatly inform these ice sheet modeling efforts.

Comments

meaningless, unless the geothermal is new

[dltaylor]

Usually (Yellowstone, Iceland, ...) geothermal sources are present tens of thousands, if not tens of millions, of years before present. Unless this is a newly-formed hot spot, the ice sheet has survived millions of years of it. Only the OTHER (read: us) source of heat is now exposing the ice sheet to more heat than it can withstand.

Re:Queue the deniers

[greenbird]

Yes, it does. It's the only way for practical research to ever happen. You can't go around questioning fundamental assumptions at every turn. This doesn't mean that those fundamental assumptions are "settled" for all time, but from a practical standpoint, science must treat some core assumptions as effectively "settled" in order to get on with any detailed research.

The level of ignorance is astounding. "questioning fundamental assumptions" is exactly what science is all about. Nothing is ever settle in science. Major breakthroughs occur when you successfully challenge fundamental assumptions. And this gets modded up. It's no wonder the current climate debate is so off kilter.