What Greenland Looks Without Ice Sheet

Posted: Dec 16 2017, 2:58am CST | by , in News | Latest Science News

What Greenland Looks without Ice Sheet
Credit: British Antarctic Survey

New map reveals landscape beneath Greenland's ice sheet

Scientists at the British Antarctic Survey alongside their international collaborators have created the most detailed map of the bedrock below the Greenland’s ice sheet. The map reveals a high resolution and accurate picture of the landscape beneath the Greenland’s ice sheet. It will help researchers better understand how the ice sheet might respond to a warming climate and how the melting of the ice sheet will contribute to the future sea level rise.

“This new compilation of the 3-D landscape beneath the Greenland Ice Sheet provides the first seamless transition between the landmass and its adjoining seabed, and this gives scientists a bird's eye view of the fringes of Greenland which are experiencing the most changes.” British Antarctic Survey (BAS) cartographer Dr Peter Fretwell, who was involved in producing the printed map, said in a statement.

Greenland is the second largest ice body in the world extending 1.7 million-square-kilometer. Its ice sheet has been losing mass in the past few decades and warming temperatures will mean more rapid melting of Greenland’s ice sheet. And sea level rise is the natural consequence of melting ice sheets.

The new map, named “Greenland Basal Topography BedMachine v3,”provides important data for future estimates of how much ice mass will be lost and how much water will enter the oceans. If all the ice on Greenland melts, it would raise global sea-levels by 7.42m or around 24 feet.

"What's also surprising is that there is more ice and the bed is deeper in some places than previous maps suggest, so this means the total contribution from the ice sheet to global sea level rise would be 7.42 meters if it were to melt completely, slightly higher than previously calculated." Peter Fretwell said.

The map was compiled using datasets collected from a number of sources – from satellite, airborne and ground-based radar and seabed mapping from research ships. The printed map is unveiled this week at the American Geophysical Union meeting in New Orleans.

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<a href="/latest_stories/all/all/47" rel="author">Hira Bashir</a>
The latest discoveries in science are the passion of Hira Bashir (). With years of experience, she is able to spot the most interesting new achievements of scientists around the world and cover them in easy to understand reporting.




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