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Terrifying satellite photos reveal Antarctica just shed a Manhattan-sized chunk of ice

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The growing crack in the Larsen C ice shelf is the most dramatic example of change in Antarctica right now. But it isn’t the continent’s only frozen feature changing in a warming world.

Ice around the continent is disappearing as the air and water heat up and the less dramatic breakdowns are just as important to understanding the fate of the ice and the world’s coastal areas.

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Before and after satellite imagery show an iceberg breaking off the calving front of the Pine Island Glacier.
Credit: NASA Earth Observatory
 

The Pine Island Glacier on the coast of West Antarctica is a case in point. A massive iceberg roughly 225 square miles in size — or in more familiar terms, 10 times the size of Manhattan — broke off in July 2015. Scientists subsequently spotted cracks in the glacier on a November 2016 flyover. And in January, another iceberg cleaved off the glacier.

Satellite imagery captured the most recent calving event, which Ohio State glaciologist Ian Howat said “ is the equivalent of an ‘aftershock’” following the July 2015 event. The iceberg was roughly “only” the size of Manhattan, underscoring just how dramatic the other breakups have been.

Simon Gascoin, an ice and remote sensing expert at France’s National Center for Scientific Research, noted on Twitter that another crack could be seen just inland from where the iceberg calved off, raising the possibility of another calving event.

In an email, he said that it’s hard to tie these individual events to climate change, but “many studies have shown that Pine Island Glacier is retreating and thinning. That the recent rifting and calving could totally be evidence of an ongoing, rapid disintegration of the ice shelf, mostly due to ocean warming.”

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The ocean under Pine Island Glacier’s ice shelf has warmed about 1°F since the 1990s. That’s causing the ice shelf to melt and pushing the grounding line — the point where the ice begins to float — back toward land, creating further instability.

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Since 1992, Pine Island and some of its glacial brethren in West Antarctica have seen the fastest grounding line retreat of any glaciers on the continent.

Cracks have formed elsewhere on Pine Island Glacier including about six miles inland from the calving front, according to NASA. It’s not time to put the glacier and its ice shelf on death watch like the Larsen C ice shelf on the Antarctic Peninsula, but it’s ice that researchers plan to monitor closely in the coming years.

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The glaciers and ice shelves help hold back a massive ice sheet on land. Their failure would send that ice to the ocean, pushing sea levels up to 13 feet higher than they are today. Some research has indicated that the melt of these glaciers is unstoppable, though their disappearance won’t necessarily happen overnight.

Other part of Antarctica from the peninsula to East Antarctica are also in danger of slowly melting out and raising sea levels. Cutting carbon pollution presents the only path forward to stave off the worst impacts of a melting Antarctic.

This article was originally published at Climate Central

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AG Bill Barr will ‘try to interfere’ in the 2020 election to re-elect Trump: MSNBC national affairs analyst

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Attorney General William Barr will use the Department of Justice to "try to interfere" in the 2020 presidential election to re-elect Donald Trump, MSNBC's national affairs analyst predicted on Tuesday.

John Heilemann was interviewed by Lawrence O'Donnell on MSNBC's "The Last Word."

"The attorney general, from the moment he walked into this job, has behaved in a -- as a ruthless, relentless political hack and a thug and who has behaved not as attorney general of the United States," Heilemann said.

"He made a travesty of the Mueller report and continues to lie on Donald Trump's behalf at every opportunity," he added.

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Trump welcomed Russia’s Sergey Lavrov to the White House — to humiliate us all

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Despite the fact that President Donald Trump still refuses to have Ukrainian President Volodymyr Zelensky to Washington for an officials meeting — a topic at the center of the scandal driving Trump’s impeachment — the White House hosted Russian Foreign Minister Sergey Lavrov on Monday.

And while Lavrov was honored with his second private Oval Office meeting (the first one was a cataclysmic disaster) and a press conference with Secretary of State Mike Pompeo, the foreign minister took his opportunity here to repeatedly humiliate the United States.

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United States, Mexico, Canada finalize Donald Trump’s USMCA trade deal

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The United States, Mexico and Canada signed a deal Tuesday to finalize their new trade agreement, paving the way to ratification after more than two years of arduous negotiations.

However, the impeachment trial of President Donald Trump in the US Senate would likely delay Congressional ratification of the agreement until next year, said Senate Majority Leader Mitch McConnell.

In reality, it is the second time the three countries have triumphantly announced the conclusion of the United States-Mexico-Canada Agreement (USMCA), the deal meant to replace the 25-year-old NAFTA, which President Donald Trump complains has been "a disaster" for the US.

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