Greenland ice sheet melt 'off the charts' compared with past four centuries

Share
Greenland ice sheet melt 'off the charts' compared with past four centuries

A contemporary study portrays this enormous melt out wasn't only an irregularity juxtaposed with the last 40 years but the last 350. The findings also clearly demonstrate the impact of climate change on Arctic melting and global sea level rise, according to the research team.

'The melting and sea-level rise we've observed will be dwarfed by what may be expected in the future'.

"What we found with our ice cores is that it's melting today more than at any time within at least the last three and a half centuries", he said, "and probably, melting more today than any time in the last seven to eight thousand years". The researchers found that the rate translated to a 50-percent increase in the runoff of meltwater into the sea compared with the preindustrial era.

Melting from Greenland's ice sheet is the largest single driver of global sea level rise, which scientists predict could swamp coastal cities and settlements in the coming decades. The team focused on these high elevations so they would be able to study records of the melting's intensity of the melting dating all the way back to the 17th century.

The report comes after naturalist Sir David Attenborough warned the collapse of civilisations and extinction of much of the natural world "is on the horizon" without urgent action to tackle climate change.

"Rather than increasing steadily as climate warms, Greenland will melt increasingly more and more for every degree of warming". Instead, it forms distinct icy bands that stack up in layers of densely packed ice over time.

Researchers from the MIT-WHO Joint Program, University of Washington, Wheaton College, University of Leige, Desert Research Institute, and Utrecht University also worked on the study. Thicker melt layers represented years of higher melting, while thinner sections indicated years with less melting. Mwltwater from the ice sheet runs off into the ocean, contributing to sea level rise.

The long-term record the researchers built from these layered ice cores allowed them to spot a slight trend of increased melting across Greenland coinciding with the beginning of modern-day warming in the mid-1800s.

Study co-author Matt Osman, a graduate student, said: "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". Headed by climate scientist and glaciologist Luke Trusel of Rowan University, a team of U.S. and European scientists carried out the first continuous, multi-century analysis of the Greenland ice sheet meltdown.

"We need to be aiming for net-zero emissions before 2050".

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.

This research was funded by the US National Science Foundation, institutional support from Rowan University and Woods Hole Oceanographic Institution, the US Department of Defense, the Netherlands Organization for Scientific Research, the Netherlands Earth System Science Center, and the Belgian National Fund for Scientific Research.

Share

Advertisement

Related Posts

Karnataka: Villagers Drain Lake After HIV-Positive Woman Found Drowned
Analysing the situation of the body, the villagers refused to drink the water claiming that it was contaminated with HIV . Pradeep Hanikere, another villager, said the daily hardship was preferable to drinking water from the lake.

Captain Marvel gets a new poster ahead of today’s trailer
And she gets unintentionally involved in their war. "We made you one of us, so you could live longer, stronger, superior". It's been almost three months since the first Captain Marvel trailer dropped, near breaking the internet in the process.

Mariners' Jean Segura traded to Phillies in five-player deal
Segura has $14.25 million per season owed to him each of the next four seasons while Nicasio is set to make $9 million in 2019. Washington reportedly offered the outfielder a 10-year, $300 million contract on the final day of the 2018 regular season.

What made Jennifer Aniston 'burst into tears'?
However, when Parton met Dolly at a dinner party at Aniston's house, she knew it was a sign of respect. You know, people actually spoke to each other and hung out with each other and talked", Aniston said.

'It's been an honour,' says Merkel as German party picks new leader
She is the preferred candidate to take over as the CDU leader - sometimes even dismissed as a mini-Merkel. However, it's possible elections could be called before then.

Ocasio-Cortez Promises $15-an-hour Intern "Living Wage" (Math & Economics Disagree)
Ocasio-Cortez acknowledged the new fund , noting that it will give $20,000 per member of Congress for their interns. She also tweeted on Monday that she has seen congressional employees waiting tables on the side.

NATO Vows To Stay In Afghanistan Despite 'High' Afghan Forces' Losses
Earlier this week, PM Khan had told a group of media persons that he could change the portfolio of ministers who won't perform. Defending ties with Beijing, the PM said our relationship with China is not one-dimensional.

Donald Trump blames Mueller probe, 'Presidential Harassment' for approval rating
Former FBI Director James Comey has arrived on Capitol Hill for a closed-door interview with two House committees. President Donald Trump , speaking behind a microphone during a press conference at the White House.

Liverpool lose Joe Gomez for six weeks
Dyche told his post match press conference. "I think the only one that was questionable was Bardsley's". Dyche sent his best wishes to the 21-year-old but insisted Mee had done nothing wrong.

Seal with eel stuck up its snout gets help from nosy scientists
Once revealed the seal was in good health, social media users couldn't help but poke a little fun at the "rebel" sea creature. Except ... is that an eel coming out of his nose?! Either way, all can agree it doesn't look comfortable.

© 2015 ExpressNewsline. All Rights reserved.