A new study in Science suggests the ice sheet may be able to slow its melting rate.


To view photo descriptions, click full screen, then "Show info."

One of the primary forces behind climate change-driven sea level rise is the Greenland Ice Sheet. Covering 80 percent of Greenland, it's the world's second-largest chunk of ice (after the Antarctic Ice Sheet) and dumps 240 billion tons of fresh water into the oceans every year, accounting for a full fifth of annual sea level rise. And in recent years it's been melting faster than ever, enough to make it a primary target of the IPCC, which has tapped teams of scientists to see what the full effect of the increased melting could be. Some reports say the rise worldwide from a disappearing Greenland Ice Sheet could be as much as a meter, enough to wreak havoc on places like New York City and low-lying Palau.

But a study out yesterday in Science paints a more optimistic picture: Even with global warming, the ice sheet may be able to slow its melting rate much faster than previously thought. A team of Danish researchers used archived aerial photos (shown in the slideshow above) of the ice sheet, dating back to the early '80s, to compare other episodes of rapid melting in the last few decades. What they show, lead author Kurt Kjær of the University of Copenhagen said in a statement, is that the ice sheet is dynamic, able to shift quickly from melting to holding firm; the record melt we've seen recently could be over in as soon as eight years. For that reason, he said, it's wrong to use the current melting rate to make predictions about sea level rise in the coming century, as some studies have done.

"It's too early to proclaim the 'ice sheet's future doom' and subsequent contribution to serious water problems for the world," he said. "It turns out that the ice sheet is able to more quickly stabilize itself in comparison to what many other models and computer calculations predict."

Photos courtesy of Niels J. Korsgaard and Anders A. Bjørk, Natural History Museum of Denmark.

The Climate Desk is a journalistic collaboration between The Atlantic, Mother Jones, Slate, and others, dedicated to exploring the impact—human, environmental, economic, political—of a changing climate. Learn more at theclimatedesk.org.

About the Author

Most Popular

  1. A woman works in a store that has a sign indicating it is going out of business, in Nogales, Arizona
    Life

    How Cities Can Save Small Shops

    Some places are already taking action, but New York City is lagging behind. Here’s a blueprint for keeping local retail healthy.

  2. Equity

    How Venice Beach Became a Neighborhood for the Wealthy

    And what that means for affordable housing across the country.

  3. Tomatoes, scallions, asparagus, and other vegetables spread out on a table
    Life

    For Peak Happiness, Spend Money to Save Time

    A study suggests time-saving services like meal delivery and housekeepers boost life satisfaction—for the purchaser, of course.

  4. An illustration of a grid of canned food
    Equity

    What's the Matter With Little Free Food Pantries?

    They highlight food insecurity, without doing much to take a bite out of it.

  5. Design

    The Rivers of the U.S., Collected Into a Nifty Subway Map

    A designer who spent his youth floating on rafts has conjured up a delightful transit guide to America’s waterways.