News / Science & Technology

Massive Lake Found Under Greenland Ice

Water from the Greenland perennial firn aquifer draining from a core extracted 12 m below the surface of the ice sheet. The core was drilled in April, months prior to seasonal melt, with air temperatures -15 C confirming the water was retained at depth th
Water from the Greenland perennial firn aquifer draining from a core extracted 12 m below the surface of the ice sheet. The core was drilled in April, months prior to seasonal melt, with air temperatures -15 C confirming the water was retained at depth th

Related Articles

Huge Freshwater Aquifers Found Under Ocean Floor

Fresh water trapped under ocean could potentially provide drinking water to parts of the world that face shortages

Climate Change Affecting Water Resources

Latest computer models show different parts of the world will see varied effects, especially with regard to fresh water supplies
VOA News
A massive lake has been found under the ice in Greenland.  The 43,500 square kilometer body of water could have major implications for understanding sea level rise.

Researchers at the University of Utah say the lake, known as a “perennial firn aquifer,” remains liquid year-round despite the otherwise perpetually frozen landscape.

“Large amounts of snow fall on the surface late in the summer and quickly insulates the water from the subfreezing air temperatures above, allowing the water to persist all year long,” said Rick Forster, lead author and professor of geography at the University of Utah.

The Greenland Ice Sheet is vast, covering roughly the same area as the states of California, Nevada, Arizona, New Mexico, Colorado and Utah combined. The average thickness of the ice is 5,000 feet. In 2012, the ice sheet lost volume of 60 cubic miles – a record for melt and runoff.

“Of the current sea level rise, the Greenland Ice Sheet is the largest contributor – and it is melting at record levels,” said Forster. “So understanding the aquifer’s capacity to store water from year to year is important because it fills a major gap in the overall equation of meltwater runoff and sea levels.”

Since 2010, Forster’s team has measured snow accumulation Greenland and how it varies from year to year. The area they study covers 14 percent of southeast Greenland yet receives 32 percent of the entire ice sheet’s snowfall, but there has been little data gathered.

In 2010, the team drilled core samples in three locations on the ice for analysis. Team members returned in 2011 to approximately the same area, but at lower elevation. Of the four core samples taken then, two came to the surface with liquid water pouring off the drill while the air temperatures were minus 20 degrees centigrade. The water was found at about 10 meters below the surface at the first hole and at 25 meters in the second hole.

“This discovery was a surprise,” Forster says. “Although water discharge from streams in winter had been previously reported, and snow temperature data implied small amounts of water, no one had yet reported observing water in the firn that had persisted through the winter.”

The consequences of losing the Greenland Ice Sheet could be catastrophic. If all the water retained in the ice sheet melted, it is estimated that the global sea level would rise about 6 meters, says Forster.

Although no one is predicting a total meltoff all at once, keeping an eye on ice formation, runoff amounts and how the water is moving is critical to accurately predicting sea level changes.

Until now, calculations of the ice sheet mass changes did not include a year-round storage mechanism for liquid water.

Forster says the reservoir’s exact role is unknown. “It might conserve meltwater flow and thus help slow down the effects of climate change. But it may also have the opposite effect, providing lubrication to moving glaciers and exacerbating ice velocity and calving increasing the mass of ice loss to the global ocean.”

As for whether climate change caused the aquifer to form, Forster says that’s not clear, but simulations of the Greenland Ice Sheet going back to the early 1970s would suggest it has been around for some time.

The study was published online Sunday, Dec. 22, in the journal Nature Geoscience.

You May Like

Egypt's Suez Canal Dreams Tempered by Continued Unrest

Seen as a potential driver of recovery, Cairo’s plan to expand waterway had been raising hopes to give country much needed economic boost More

Ebola Maternity Ward in Sierra Leone First of its Kind

Country already had one of world's highest maternal mortality rates before Ebola arrived, virus has added even more complications to health care More

Malaysia Flight 370 Disappearance Ruled Accident

Aircraft disappeared on March 8, 2014; with ruling, families of 239 passengers and crew can now seek compensation from airline More

This forum has been closed.
Comment Sorting
Comments
     
by: Anonymous
December 23, 2013 2:00 PM
last one in is a dirty rotten egg.....


by: Edwin Thomas
December 23, 2013 12:45 PM
Every little bit of new data will help. Although, even now the climate change deniers are likely to greet any changes with "Liar, liar!"

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Groundbreaking Hand-Painted Documentary About Van Gogh in Productioni
X
George Putic
January 29, 2015 9:43 PM
The troubled life of the famous 19th century Dutch painter Vincent van Gogh has been told through many books and films, but never in the way a group of filmmakers now intends to do. "Loving Vincent " will be the first ever feature-length film made of animated hand-painted images, done in the style of the late artist. VOA’s George Putic reports.
Video

Video Groundbreaking Hand-Painted Documentary About Van Gogh in Production

The troubled life of the famous 19th century Dutch painter Vincent van Gogh has been told through many books and films, but never in the way a group of filmmakers now intends to do. "Loving Vincent " will be the first ever feature-length film made of animated hand-painted images, done in the style of the late artist. VOA’s George Putic reports.
Video

Video Rock-Consuming Organisms Alter Views of Life Processes

Scientists thought they knew much about how life works, until a discovery more than two decades ago challenged conventional beliefs. Scientists found that there are organisms that breathe rocks. And it is only recently that the scientific community is accepting that there are organisms that could get energy out of rocks. Correspondent Elizabeth Lee reports.
Video

Video Paris Attacks Highlight Global Weapons Black Market

As law enforcement officials piece together how the Paris and Belgian terror cells carried out their recent attacks, questions are being asked about how they obtained military grade assault weapons - which are illegal in the European Union. As VOA's Jeff Swicord reports, experts say there is a very active worldwide black market for these weapons, and criminals and terrorists are buying.
Video

Video Activists Accuse China of Targeting Religious Freedom

The U.S.-based Chinese religious rights group ChinaAid says 2014 was the worst year for religious freedom in China since the end of the Cultural Revolution. As Ye Fan reports, activists say Beijing has been tightening religious controls ever since Chinese leader Xi Jinping came to office. Hu Wei narrates.
Video

Video Super Bowl Ads Compete for Eyes on TV, Web

Super Bowl Sunday (Feb. 1) is about more than just the NFL's American football championship and big parties to watch the game. Viewers also tune in for the world famous commercials that send Facebook and Twitter abuzz. Daniela Schrier reports on the social media rewards for America’s priciest advertising.
Video

Video Theologians Cast Doubt on Morality of Drone Strikes

In 2006, stirred by photos of U.S. soldiers mistreating Iraqi prisoners, a group of American faith leaders and academics launched the National Religious Campaign Against Torture. It played an important role in getting Congress to investigate, and the president to ban, torture. VOA's Jerome Socolovsky reports.
Video

Video Freedom on Decline Worldwide, Report Says

The state of global freedom declined for the ninth consecutive year in 2014, according to global watchdog Freedom House's annual report released Wednesday. VOA's William Gallo has more.
Video

Video MRI Seems to Help Diagnose Prostate Cancer, Preliminary Study Shows

Just as with mammography used to detect breast cancer, there's a lot of controversy about tests used to diagnose prostate cancer. Fortunately, a new study shows doctors may now have a more reliable way to diagnose prostate cancer for high risk patients. More from VOA's Carol Pearson.
Video

Video Smartphones About to Make Leap, Carry Basic Senses

Long-distance communication contains mostly sounds and pictures - for now. But scientists in Britain say they are close to creating additions for our smartphones that will make it possible to send taste, smell and even a basic touch. VOA’s George Putic reports.
Video

Video Former Sudan 'Lost Boy' Becomes Chess Master in NYC

In the mid-1980’s, thousands of Sudanese boys escaped the country's civil war by walking for weeks, then months and finally for more than a year, up to 1,500 kilometers across three countries. The so-called Lost Boys of the Sudan had little time for games. But one of them later mastered the game of chess, and now teaches it to children in the New York area. VOA’s Bernard Shusman in New York has his story.
Video

Video NASA Monitors Earth’s Vital Signs From Space

The U.S. space agency, NASA, is wrapping up its busiest 12-month period in more than a decade, with three missions launched in 2014 and two this month, one in early January and the fifth scheduled for January 29. As VOA’s Rosanne Skirble reports, the instruments being lifted into orbit are focused on Earth’s vital life support systems and how they are responding to a warmer planet.
Video

Video Crowded Republican Presidential Field Off to Early Start for 2016

It seems early, but the 2016 U.S. presidential election campaign is already heating up. Though no one has officially announced a candidacy, several potential Republican contenders have been busy speaking to conservative groups about making a White House run next year. Many of the possible contenders are critical of the Obama administration’s foreign policy record. VOA national correspondent Jim Malone reports.

Circumventing Censorship

An Internet Primer for Healthy Web Habits

As surveillance and censoring technologies advance, so, too, do new tools for your computer or mobile device that help protect your privacy and break through Internet censorship.
More

All About America

AppleAndroid