Underneath Greenland's ice, world's mega canyon
Despite several years of satellite and geographical surveys over world’s largest island Greenland. There was much unknown about its properties of bedrock that lies beneath the Greenland ice canyon that covers more than 86%of the land. Scientists watching Greenland's enormous ice sheet have discovered what appears to be a 460-mile mega canyon far underneath the ice is the world's largest island. Radar images taken by NASA shows it’s buried below Greenland ice blankets, covering more than 3 kilometers. The groove is about half longer than Arizona's 445 kilometer Canyon, but not as deep as it ranges from 200- 800 meters. The canyon extends from middle of Greenland to its northern shore, and it's possibly 4 million years old. It’s difficult to determine the time it will take to melt or erode due to increasing global warming.
According to prof Jonathan Bamber a scientist, lead study author and a physical geography professor at Bristol university, United Kingdom he said it pretty deep and thought it’s a river system and that it was there long before ice was and perhaps was modified by the ice sheet that cover it. The ice sheet, is more than 3 kilometers deep, is heavy that it makes the island to sag hence moving it from 500 m to 200 m below sea level. This leaves with the world to wonder what lies in the areas or the Antarctica that still are not explored.
It was discovered by surprise this is due to intense focus on Greenland as due to rising global temperatures. British Antarctic Survey held it’s amazing to discover such a huge geographical feature. The canyon runs downhill, melt water from the ice below sea level at the northern end – at a relative trickle, rather than a torrent. nasa have also confirmed same about the ice canyon. Glaciologists says that the canyon is important in transporting sub-glacial water produced at the bed towards the Antarctic Ocean.