News / Science & Technology

Mega Canyon Discovered in Greenland

A massive canyon has been discovered beneath the Greenland ice.
A massive canyon has been discovered beneath the Greenland ice.

Related Articles

Massive Volcano Erupts on Jupiter's Moon, Io

The eruption was bigger than any ever recorded on Earth

Evidence Found of Water Deep Below Lunar Surface

The findings represent the first detection of water from lunar orbit

Video Titan's Surface More Rigid Than Thought, Says Study

Saturn's moon is of great interest because of its thick atmosphere and possible liquid ocean
VOA News
Scientists have discovered a massive canyon hidden almost two kilometers under Greenland’s ice cap.

The canyon is at least 750 kilometers long and, according to the U.S. space agency, NASA, has the characteristics of a winding river channel. In some places the canyon is 800 meters deep, which is on a similar scale as the Grand Canyon.

NASA says the canyon was made before the ice formed over much of Greenland.

"One might assume that the landscape of the Earth has been fully explored and mapped," said Jonathan Bamber, professor of physical geography at the University of Bristol in Britain and lead author of the study. "Our research shows there's still a lot left to discover."

Using radar data collected over decades, NASA and researchers from Britain and Germany were able to piece together the landscape of the canyon. A large portion of this data was collected from 2009 through 2012 by NASA's Operation IceBridge, an airborne science program studying polar ice.

One instrument in particular, the Multichannel Coherent Radar Depth Sounder, can see through massive amounts of ice to the bedrock below. The canyon appears to extend from almost the center of the island and ends beneath the Petermann Glacier fjord in northern Greenland.

Researchers think that before Greenland was covered in ice - some 4 million years ago - water flowed through the canyon as part of a massive river system. Now, researchers say the canyon “plays an important role in transporting sub-glacial melt water from the interior of Greenland to the edge of the ice sheet into the ocean.”

"It is quite remarkable that a channel the size of the Grand Canyon is discovered in the 21st century below the Greenland ice sheet," said Michael Studinger, IceBridge project scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "It shows how little we still know about the bedrock below large continental ice sheets."

Bamber's team published its findings Thursday in the journal Science.


Here's a video about Greenland's mega canyon:

You May Like

India PM Modi's Party Distances Itself From Religious Conversions

BJP under fire for being slow to rein in hardline affiliate groups allegedly trying to promote Hindu-dominant agenda by luring Muslims and Christians to convert More

Anti-Whaling Group Found in Contempt of Court

Radical environmentalists who threw acid and smoke bombs at Japanese whalers in the waters off Antarctica continue their campaign to disrupt Japan's annual whale hunt More

UN's Ban Urges End to Discrimination Against Ebola Workers

Ban was speaking in Guinea on the second day of a whistle-stop tour aimed at thanking healthcare workers of the countries at the heart of the epidemic More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
US Decision on Cuba Underscores Divisions Among Miami Cubansi
X
Sharon Behn
December 19, 2014 9:34 PM
For decades, older, more conservative Cubans have been gathering at Café Versailles on the corner of Calle Ocho to eat Cuban food and talk politics. After hearing of President Barack Obama’s decision, a number of them gathered in front of the café with posters to protest. VOA's Sharon Behn reports on the situation.
Video

Video US Decision on Cuba Underscores Divisions Among Miami Cubans

For decades, older, more conservative Cubans have been gathering at Café Versailles on the corner of Calle Ocho to eat Cuban food and talk politics. After hearing of President Barack Obama’s decision, a number of them gathered in front of the café with posters to protest. VOA's Sharon Behn reports on the situation.
Video

Video Three Cities Bid for Future Obama Presidential Library

President Barack Obama still has two years left in his term in office, but the effort to establish his post-presidential library is already underway. The bid for the Obama Presidential Library is down to four locations in three states -- New York, Hawaii, and Illinois. As VOA’s Kane Farabaugh reports, each of them played an important part in the president’s life before he reached the White House.
Video

Video Cuba Deal is Major Victory for Pope’s Diplomatic Initiatives

Pope Francis played a key role in brokering the US-Cuba deal that was made public earlier this week. It is the most stunning success so far in a series of peacemaking efforts by the pontiff. VOA religion reporter Jerome Socolovsky has more.
Video

Video Fears of More Political Gridlock in 2015

2014 proved to be a difficult year politically for President Barack Obama and a very good year for the U.S. Republican Party. Republican gains in the November midterm elections gave them control of the Senate and House of Representatives for the next two years -- setting the stage for more confrontation and gridlock in the final two years of the Obama presidency. VOA National Correspondent Jim Malone has a preview from Washington.
Video

Video Sudan School Becomes Target of Aerial Attacks

The school dropout rate is at an all-time high in Sudan's South Kordofan state because many schools have been destroyed during the three-year civil war between the government and SPLA-N rebel forces. Adam Bailes visited Sudan's Nuba Mountains' region and reports many children are simply too scared to go to school
Video

Video VOA Reporter Tours Devastated Peshawar School

Islamist militants wearing military uniforms and strapped with explosives attacked a military run school Tuesday in the northwestern Pakistani city of Peshawar. At least 141 people were killed in the horrific attack, most of them young students. VOA reporter Ayaz Gul visited the devastated school and attended the funeral of the principal who courageously tried to save her students from the deadly attack.
Video

Video Nigerians Fleeing Boko Haram Languish in Camp Near Capital

In its five-year effort to impose Islamic law in northeastern Nigeria, the Boko Haram extremist group has killed thousands of people and forced hundreds of thousands to flee. Some of those who ran for their lives now live in squalor on the edges of the capital, Abuja. Chris Stein reports for VOA.
Video

Video Aceh Rebuilt Decade After Tsunami, But Scars Remain

On December 26, 2004 there was an earthquake in the Indian Ocean so powerful it caused the Earth’s axis to wobble a few centimeters. Onshore on the island of Sumatra, the resulting tsunami was devastating. A decade later, VOA Correspondent Steve Herman reports from Banda Aceh, Indonesia, where although there is little remaining evidence of the physical devastation, the psychological scars among survivors remain.

All About America

AppleAndroid