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Greenland ice sheet melting faster than thought: study

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This image obtained November 14, 2018 courtesy of NASA shows the Hiawatha impact crater covered by the Greenland Ice Sheet and a tongue of ice that breaches the crater’s rim NASA/AFP/File / John SONNTAG

Greenland’s ice sheet may have completely melted within the next millennium if greenhouse gas emissions continue at their current rate, according to a new study with implications for sea-level rise around the world.

The Greenland ice sheet holds the equivalent of seven meters (yards) of sea level.

“If we continue as usual, Greenland will melt,” said lead author Andy Aschwanden, a research associate professor at the University of Alaska Fairbanks’ Geophysical Institute.

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It is the most recent warning about warming in the world’s coldest regions.

“What we are doing right now in terms of emissions, in the very near future, will have a big long-term impact on the Greenland ice sheet, and by extension, if it melts, to sea level and human society,” Aschwanden said.

The study, which used data from NASA’s Operation IceBridge airborne campaign and was published in Science Advances, is the latest to suggest a much greater rate of melt than was estimated by older models.

The model relies on more accurate representations of the flow of “outlet glaciers,” river-like bodies of ice that connect to the ocean.

“Outlet glaciers play a key role in how ice sheets melt, but previous models lacked the data to adequately represent their complex flow patterns,” NASA said in a statement about the study.

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“The study found that melting outlet glaciers could account for up to 40 percent of the ice mass lost from Greenland in the next 200 years.”

As ocean waters have warmed over the past two decades, they have melted the floating ice that once shielded the outlet glaciers.

As a result, “the outlet glaciers flow faster, melt and get thinner, with the lowering surface of the ice sheet exposing new ice to warm air and melting as well.”

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In the next 200 years, the ice sheet model shows that melting at the present rate could contribute 48 to 160 centimeters (19 to 63 inches) to global sea level rise, 80 percent higher than previous estimates.

In October, the UN’s Intergovernmental Panel for Climate Change (IPCC) reported that avoiding global climate chaos will require a major transformation of society and the world economy that is “unprecedented in scale,” and warned time is running out to avert disaster.

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WATCH: Van Jones delivers epic lecture on CNN after Trump ‘refused to condemn white supremacy’

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CNN political analyst Van Jones tore into Donald Trump after the president's highly controversial decision to repeatedly refuse to condemn white supremacy at the first 2020 general election debate.

"Only three things happened for me tonight," Jone said.

"Number one, Donald Trump refused to condemn white supremacy," he explained.

"Number two, the president of the United States refused to condemn white supremacy," he continued.

"Number three, the commander-in-chief refused to condemn white supremacy on the global stage -- in front of my children, in front of everybody's families -- and he was given the opportunity multiple times to condemn white supremacy," Jones said.

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2020 Election

Jake Tapper stunned by Trump’s debate: ‘That was a hot mess inside a dumpster fire inside a train wreck’

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CNN Jake Tapper reacted in shock on Tuesday following the first presidential debate between Democratic nominee Joe Biden and President Donald Trump.

"That was a hot mess inside a dumpster fire inside a train wreck," Tapper said. "That was the worst debate I have ever seen. In fact, it wasn't even a debate. It was a disgrace."

"And it's primarily because of President Trump," he remarked, "who spent the entire time interrupting, not abiding by the rules that he agreed to, lying, maliciously attacking the son of the vice president. When asked to condemn white supremacists, he brought up the name of a neo-fascist, far-right group and said, 'Stand back and stand by.'"

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2020 Election

Trump causes widespread shock by refusing to call out white supremacy at first 2020 debate

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President Donald Trump was asked to call out white supremacy during the first 2020 general election presidential debate -- and refused to do so.

Instead of calling out white supremacists, Trump instead said, “Proud Boys, stand back and stand by!”

Here's some of what people were saying about Trump's views on racism:

https://twitter.com/MSNBC/status/1311133473437085698

https://twitter.com/MichaelEHayden/status/1311133700344737794

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