Quantcast
Climate
Icebergs calving from an ice shelf in West Antarctica. NASA / GSFC / Jefferson Beck / CC BY-SA 2.0

Good News From Antarctica: Rising Bedrock Could Save Vulnerable Ice Sheet

After last week's disturbing news that ice melt in Antarctica has tripled in the last five years, another study published Thursday offers some surprising good news for the South Pole and its vulnerable West Antarctic Ice Sheet (WAIS).

The study, published in Science by an international research team, found that the bedrock below the WAIS is rising, a process known as "uplift," at record rates as melting ice removes weight, potentially stabilizing the ice sheet that scientists feared would be lost to climate change.


"The rate of uplift we found is unusual and very surprising. It's a game changer," study co-author and Ohio State University (OSU) earth science professor Terry Wilson said in an OSU press release.

The study is good news for coastal dwellers, since the WAIS could cause more than three meters (approximately 9.84 feet) of sea level rise if it collapsed, according to The Independent.

Luckily, as ice melts, weight is removed from the ground beneath it, which springs up and moves the remaining ice further from the warming water melting it from below.

"This very rapid uplift may slow the runaway wasting and eventual collapse of the ice sheet," study co-author and Colorado State University professor Rick Aster told The Independent.

"The uplift tends to stabilize the critical grounding line where the ice sheet loses contact with underlying bedrock or sediment and goes afloat," Aster said.

Researchers knew removing ice would lead to bedrock uplift, but they thought it would be a process that would take thousands of years and would not happen quickly enough to stabilize the ice sheet.

Instead, they measured an uplift rate of 41 millimeters (approximately 1.6 inches) a year, compared to uplift rates of 20 to 30 millimeters (approximately 0.79 inches to 1.18 inches) a year in Alaska and Iceland, which are considered fast.

"We previously thought uplift would occur over thousands of years at a very slow rate, not enough to have a stabilizing effect on the ice sheet. Our results suggest the stabilizing effect may only take decades," Wilson said in the release.

This is because the mantle, a layer of hotter, fluid rock under the earth's solid crust, is hotter and more fluid under the ice sheet than scientists previously thought, according to study lead author Valentina R. Barletta of the Technical University of Denmark.

Scientists not involved in the study said the findings would not ultimately save the ice sheet if humans keep "stomping on the climate gas pedal."

"It's not a get out of jail free card," Ted Scambos, a glaciologist at the National Snow and Ice Data Center in Boulder, Colorado told Science. "It's more of a refinement on the pace of [ice sheet] collapse,"

And the rate of uplift indicates weight removal, suggesting that 10 percent more ice has melted than previously thought, the OSU release said.

But the findings underline the fact that there is still more to discover about how exactly climate change will interact with other earth systems when assessing how its impacts will play out.

"The new findings raise the need to improve ice models to get a more precise picture of what will happen in the future," Barletta said.

Show Comments ()

EcoWatch Daily Newsletter

Sponsored
Business
The Overpass Light Brigade at Bascom Hall in Madison, Wisconsin on April 4, 2014. depthandtime / Flickr

Global Divestment Movement Celebrates Milestone: 1,000 Institutions With Nearly $8 Trillion in Assets Have Vowed to Ditch Fossil Fuels

By Jake Johnson

While the COP24 climate talks are at risk of ending without a concrete plan of action thanks in large part to the Trump administration's commitment to a dirty energy agenda, environmental groups on Thursday celebrated a major milestone in the global movement to take down the fossil fuel industry after the number of public and private institutions that have vowed to divest from oil, gas and coal companies surpassed 1,000.

Keep reading... Show less
Food

Slaughter-Free Lab Grown Steak Cast As Ethically Friendly Alternative

Lab-grown meat—also known as cultured meat or in vitro meat—is often cast as an environmentally and ethically friendly alternative to raising traditional livestock.

These slaughter-free products aren't available on the market yet, but the dream is so enticing that Bill Gates, Richard Branson and even Tyson Foods—one of the country's largest meat companies—have made big bets on it.

Keep reading... Show less
Energy
Northeast National Petroleum Reserve in Alaska. Bob Wick / BLM

Trump Administration's Alaska Oil and Gas Lease Sale a 'Major Flop'

Despite the Trump administration's unrelenting quest to drill the Arctic, Wednesday's oil and gas lease sale in the National Petroleum Reserve-Alaska (NPR-A) yielded a "disappointing" return of $1.5 million, E&E News reported.

Oil and gas giants ConocoPhillips, Emerald House and Nordaq Energy were the three companies that made uncontested bids on 16 tracts of land out of 254 tracts made available by the Bureau of Land Management's (BLM) annual sale in the western Arctic.

Keep reading... Show less
Climate
Dan Sedran

Environmental Changes Are Killing the Livelihood of Great Lakes Fishermen

By Corey Mintz

There's nothing in the fridge at Akiwenzie's Fish & More processing facility. The 918-square-foot building, adjacent to Natasha and Andrew Akiwenzie's house on the shores of Georgian Bay, Ontario, sits empty and dark. Out-front, gill nets lie on the ground, unused for months.

Keep reading... Show less
Sponsored
Climate
Fire in Yellowstone National Park. Mike Lewelling / NPS Climate Change Response

Poll: Most Americans Believe in Human-Made Climate Change, But a Shocking Number Still Don't

First the good news. A new Reuters/Ipsos poll out Thursday found that 57 percent of U.S. adults think climate change is caused by "human activity" or "mostly human activity"—a stance held by 97 percent or more of actively publishing climate scientists. That's up from the 47 percent in 2012.

The bad news? That implies 43 percent of U.S. adults still have doubts about the global phenomenon, similar to President Donald Trump.

Keep reading... Show less
Climate
Greta Thunberg and her father Svante at a press conference during COP24 on Dec. 4. JANEK SKARZYNSKI / AFP / Getty Images

'We Need to Act Now': 15-Year-Old Greta Thunberg Calls for Global Climate Strike

By Andrea Germanos

Greta Thunberg, the 15-year-old Swedish activist, on Wednesday called for a global climate strike. The day of action is set for Friday at "your school" or "anywhere you feel called."

Thunberg, who's made headlines for her now-weekly school strikes to urge her home country to take bold climate action, made the call from Katowice, Poland, where she's attending the COP24 climate talks, now in their second week.

Keep reading... Show less
Sponsored
Animals
Whale Shark. NOAA

Arabian Sea Sharks May be the Most Threatened in the World

By Joshua Learn

Sharks, rays and chimaeras are some of the most threatened fish in the world. More than 50 percent of species in the Arabian Sea are at elevated risk of extinction due to coastal development, overfishing, pollution and habitat destruction. According to an expansive new study, spanning more than a dozen countries, species like sawfish are particularly hard hit with extinction or local extirpation.

Keep reading... Show less
Popular

18 Cookbooks for Building a Diverse and Just Food System

By Danielle Nierenberg and Natalie Quathamer

For a delicious end to 2018, Food Tank is highlighting 18 cookbooks that embrace a diverse global food industry. The list features chefs of color and authors that identify as LGBTQ+ working to feed a food revolution that breaks the barriers of race, gender, and sexuality. These books examine everything from building Puerto Rican flavors, conquering the art of transforming leftovers into masterpieces, and grasping what merging queer culture and international cuisine looks—and tastes—like. Whether you cook seasonally, are on a budget, or eat plant-based, there's something here to inspire every reader to diversify their diet!

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!