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Melting bedrock of Antarctic Ice Sheet

Antarctic Ice Sheet at the South Pole is melting by a100km-by-50km hotspot which is discovered at the base of the ice sheet.

The affected area is three times in Greater London. Scientists have views that a combination of radioactive rocks and geothermal springs may cause the melting.

The warm bedrock clearing almost 6mm annually from the base of the 3km-thick ice sheet. It is also producing a mass of meltwater which flows away into the sub-glacial rivers and lakes to the continent’s coastline.

The researchers spotted the hotspot by observing the radar images of the ice sheet at 88 degrees South. These images further revealed a surprising sagging in the ice layers above the hotspot.

Dr. Jordan’s Discovery

Dr. Tom Jordan from the British Antarctic Survey and fellows has revealed the discovery in the journal Scientific Reports.

Dr. Jordan detailed about the discovery: “We can’t be 100% sure because we don’t have access to the rocks, but our interpretation is that this heat is coming from granites that contain lots of radioactive elements, such as uranium and potassium. That makes them hotter than you would expect.”

He further added: “But our calculations show this doesn’t quite give you enough heat. I think there’s a second process. The topography of the bedrock suggests there is faulting and that could allow hot water to circulate up through the rocks, like hot springs.”

No Danger Ahead

Antarctica is not on the risk of melting as a result of this hotspot. The affected area and amount of melting are minor to have a significant influence. This knowledge enhances our understanding of the under-ice hydrology of the continent.

The modeling of this frozen landscape might respond to future climate warming. Currently, scientists are looking for places for an unbroken record of snowfall going back more than 1.5 million years.

The trapped air bubbles and dust in ice will offer key insights about Earth’s atmosphere which continued to change through time.

The post Melting bedrock of Antarctic Ice Sheet appeared first on Ghana Live TV.



This post first appeared on Watch Gtv Ghana, Adom TV, Tune Ghana Radio GhanaLi, please read the originial post: here

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Melting bedrock of Antarctic Ice Sheet

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