'Surprisingly high' temps beneath West Antarctica causing ice to melt
Mount Erebus Antarctica’s active volcano by jeaneeem – Flickr. Licensed under CC BY 2.0 via Wikimedia CommonsA new study published Friday in the journal Science Advances reveals what some geologists have known all along: geothermal heat flowing toward the base of the West Antarctic Ice Sheet is causing the ice to melt, and it has nothing to do with warmer oceans or atmosphere. For the very first time, geothermal heating has been directly measured beneath the West Antarctic Ice Sheet (WAIS) and the UC/Santa Cruz researchers found the amount of subglacial heat was “surprisingly high.” Direct measurements of geothermal heat flowing at the base of the WAIS, below subglacial Lake Whillans, showed an extremely high heat flux, which is “significantly higher than the continental and regional averages” that used traditional measuring methods.
Since satellite measurements began in 1979, Antarctic sea ice extent around the continent has been growing year after year and leaving many researchers puzzled, since because climate models have completely missed the mark and predicted rapid ice loss from both poles. This new research shows that, at least in West Antarctica, the continent is a geologically active area that sits on one of the world’s largest Rift Systems. Altered heat and fluid release from the WAIS has been hidden from scientific investigation because the primary heat release was in hitherto unreachable areas.
Source: http://www.climatechangedispatch.com/surprisingly-high-temps-beneath-west-antarctica-causing-ice-to-melt.html
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