Greenland's ice sheet melt rate unprecedented, happening faster than anybody thought

07 December, 2018, 23:32 | Author: Kelly Sanders
  • Greenland ice sheet is melting more than it has in centuries, scientists say

Given that melting ice is significantly fueling sea-level rise, Trusel concluded: "How much Greenland melts matters".

A team of scientists journeyed to Greenland in 2015 to observe and measure the rate that the colossal ice sheets in the region are melting. Ice cover is disappearing faster than in the last four hundred years, and possibly in the last seven or eight millennia.

At today's higher Arctic temperatures, each degree of warming causes about double the amount of melting that the same degree would have caused in the 1800s, Das said. But more than half of the ice-sheet water entering the ocean comes from runoff from melted snow and glacial ice atop the ice sheet.

Global warming is melting ice in Greenland at "unprecedented rates", experts warned.

They found that the surface of Greenland's ice sheet melts on summer days.

Trusel's team of worldwide researchers analyzed ice cores extracted from Greenland, a massive island wedged between the Arctic and Atlantic Oceans.

The year 2012, in particular, was a standout for ice melt.


The research says the melting could contribute to rising sea levels - threatening low-lying cities, islands and industries worldwide. Another noteworthy aspect of the findings is how little additional warming it now takes to cause huge spikes in ice sheet melting. This frozen meltwater creates distinct ice bands that pile up over years to form layers of densely packed ice. They were able to go back as far as the 17th century.

The team analysed these results in combination with the imaging data collected by various satellites and the data from sophisticated climate models, which enabled them to determine the rate of ice melting, not only at core site, but also broadly across Greenland.

"We have had a sense that there's been a great deal of melting in recent decades, but we previously had no basis for comparison with melt rates going further back in time", Osman said.

"To be able to answer what might happen to Greenland next, we need to understand how Greenland has already responded to climate change", he said.

Because of a "nonlinear response of surface melting to increasing summer air temperatures, continued atmospheric warming will lead to rapid increases in [Greenland ice sheet] runoff and sea-level contributions", the study said.

In the wake of October's dire report from the UN Intergovernmental Panel on Climate Change warning that civilization has just more than a decade to stave off climate catastrophe, Thursday's report spells more bad news for the planet, especially the millions of people living near the world's oceans.

The core samples were brought back to ice core labs at the U.S. National Science Foundation Ice Core Facility in Denver, Colo., WHOI in Woods Hole, Mass., Wheaton College in Norton, Mass., and the Desert Research Institute in Reno, Nev. where the scientists measured physical and chemical properties along the cores to determine the thickness and age of the melt layers. Researchers drilled at such high elevations for good reason.

Recommended:



Popular

Kendrick Lamar Received The Most 2019 Grammy Nominations
Barbra Streisand's THE MUSIC.THE MEM'RIES.THE MAGIC! is nominated for Best Traditional Pop Vocal Album. Dave Chappelle, Chris Rock, Fred Armisen, Jim Gaffigan and Patton Oswalt are up for best comedy album.

WatchOS 5.1.2 is Available Today, Brings ECG and Irregular Heartbeat Detection
The all-important watchOS 5.1.2 update is rolling out now, so you should have it on your smartwatch over the next couple of days. It's available for Series 1 devices and newer that are paired to iOS devices running iOS 12.1.1 and higher.

German conservatives to replace Merkel with Annegret Kramp-Karrenbauer as party head
Regardless of which course the CDU charts, it is ironically the SPD that could decide Merkel's fate. The victor will likely lead the CDU in the next federal election due by October 2021.

Stocks battered by Wall Street, fears of U.S. slowdown
Regardless of other possible reasons, "it is mainly indicative of worries about how long growth in the US can remain so strong". Rather, I suggest there should not be a Fed at all and interest rates should be left to the free market.

Trump Mulling Former US Attorney General Barr to Replace Jeff Sessions
At least one other contender who has received serious consideration from the White House, according to the person, is Rep. Barr shares at least one of the president's views on the probe being conducted by special counsel Robert S.

Satellite images show expansion, activity at two North Korean missile bases
National Security Advisor John Bolton said Tuesday that Trump thinks the North Korean strongman hasn´t met the commitments he made at the Singapore summit.

Microsoft is Rebuilding Edge Browser using Chromium for Windows & macOS
Current Edge users don't need to do anything, as the switch isn't happening very soon. And, of course it will save Microsoft resources.

Best Companies To Work For In 2019, According To Their Employees
A Facebook employee at the company's Menlo Park headquarters warned Glassdoor visitors not to believe all the negative press. Microsoft-owned LinkedIn , however, is at sixth place with a score of 4.5, read the information on the Glassdoor website.

Every Game Confirmed to Be at the Game Awards
The embedded YouTube video above is a full 4K stream, ensuring you can get every new trailer in high-resolution goodness. If you're after awards darling Red Dead Redemption 2 , Amazon has it for just $69.00, cheaper then Sony's sale price.

Burger King announces it's giving away Whoppers for ONE CENT
Recently, the fast food chain announced a new promotion to encourage people to use their mobile app. Burger King shared a video explaining how to order the Whopper sandwich on its US Twitter profile.